View CXA3266Q_1401388.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

CXA3266Q pll ic for lcd monitor/projector description the CXA3266Q is a pll ic for lcd monitors/ projectors with built-in phase detector, charge pump, vco and counter. the various internal settings are performed by serial data via a 3-line bus. applicable lcd monitor/projector resolution are ntsc, pal, vga, svga, xga, sxga and uxga etc. the CXA3266Q is the same package as the previous cxa3106q and cxa3106aq. they have the same pin configuration excluding pin 38. features supply voltage: 5 0.25v single power supply package: 48-pin qfp power consumption: 328mw sync input frequency: 10 to 120khz clock output signal frequency: 10 to 203mhz clock delay: 8/32 to 48/32 clk sync delay: 8/32 to 48/32 clk i/o level: ttl, pecl (complementary) low clock jitter 1/2 clock output ttl output high level control function pin configuration (top view) functions phase detector enable unlock output output ttl disable function power saving function (2 steps) applications crt displays lcd projectors lcd monitors multi-media digital tv ?1 e99426-ps sony reserves the right to change products and specifications without prior notice. this information does not convey any licens e by any implication or otherwise under any patents or other right. application circuits shown, if any, are typical examples illustr ating the operation of the devices. sony cannot assume responsibility for any problems arising out of the use of these circuits. 48 pin qfp (plastic) 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 36 35 34 31 32 33 40 39 38 37 41 42 43 44 45 46 47 48 iov cc iognd vcoh vcol vco hold synch syncl sync senable sclk sdata peclv cc vbb dsynch dsyncl clkh clkl clk/2h peclv cc iognd ttlv cc ttlgnd irv cc irgnd rc1 rc2 iref vcohgnd vcognd vcov cc pllgnd pllv cc voclp iognd tload cs serout divout unlock dv cc dgnd clk/2 clkn clk dsync clk/2l clk/2n 1 2 3 4 5 6 7 8 9 10 11 12
? 2 CXA3266Q absolute maximum ratings (ta = 25 c) supply voltage iov cc , dv cc , ttlv cc , peclv cc , pllv cc , vcov cc , irv cc , ?.5 to +7.0 v iognd, dgnd, ttlgnd, vcohgnd, pllgnd, vcognd, irgnd ?.5 to +0.5 v input voltage vcoh, vcol, synch, syncl, vco, hold, sync, senable, sclk, sdata, tload, cs, voclp iognd ?0.5 to iov cc + 0.5 v rc2 irgnd ?0.5 to irv cc + 0.5 v output current serout, divout, unlock, clk/2n, clk/2, clkn, clk, dsync, clk/2l, clk/2h, clkl, clkh, dsynch, dsyncl, vbb ?0 to +30 ma iref, rc1 ? to +2 ma storage temperature tstg ?5 to +150 c allowable power dissipation p d 860 mw recommended operating conditions min. typ. max. supply voltage iov cc , dv cc , ttlv cc , peclv cc , pllv cc , vcov cc , irv cc 4.75 5.00 5.25 v iognd, dgnd, ttlgnd, vcohgnd, pllgnd, vcognd, irgnd ?.05 0 0.05 v digital input din (pecl) * 1 h level iov cc ?1.1 din (pecl) * 1 l level iov cc ?1.5 v din (ttl) * 2 h level 2.0 v din (ttl) * 2 l level 0.8 v voclp (clamp voltage) ttlgnd + 2.4 ttlv cc v sync, synch, syncl input jitter ns operating ambient temperature ta ?0 +75 c * 1 vcoh, vcol, synch, syncl * 2 vco, hold, sync, senable, sclk, sdata, tload, cs
? 3 CXA3266Q block diagram t t l o u t c o a r s e d e l a y t t l o u t t t l o u t 1 b i t o n / o f f 1 b i t o n / o f f 1 b i t o n / o f f d s y n c ( t t l ) d s y n c ( p e c l ) c l k ( t t l ) n c l k ( t t l ) c l k ( p e c l ) t t l o u t t t l o u t 1 b i t o n / o f f 1 b i t o n / o f f c l k / 2 ( t t l ) n c l k / 2 ( t t l ) c l k / 2 ( p e c l ) p e c l o n / o f f d i v 1 , 2 , 4 , 8 m u x v c o f i n e d e l a y c h a r g e p u m p p h a s e d e t e c t o r p e c l i n t t l i n p e c l i n t t l i n p o l a r i t y t t l i n p r o g r a m m a b l e c o u n t e r w h o l e c h i p p o w e r s a v e s y n t h e s i z e r p o w e r s a v e t t l i n t t l o u t c o n t r o l r e g i s t e r d a c r s e t 1 / 2 2 b i t 1 b i t 6 b i t 2 b i t 1 b i t 1 2 b i t 1 / 2 5 6 t o 1 / 4 0 9 6 1 / 3 2 t o 6 4 / 3 2 c l k 1 b i t 1 b i t 1 b i t c s t l o a d d i v o u t s e r o u t s d a t a s c l k s e n a b l e i r e f p o l a r i t y 1 b i t 2 b i t l a t c h l o g i c 1 b i t o n / o f f 1 b i t o n / o f f r c 2 r c 1 v c o ( t t l ) v c o ( p e c l ) s y n c ( t t l ) s y n c ( p e c l ) h o l d ( t t l ) r e a d o u t t t l o u t 2 t o 5 c l k u n l o c k v b b p e c l o u t p e c l o u t p e c l o u t u n l o c k d e t e c t d s y n c h o l d 1 b i t 2 b i t v o c l p d i v p u l s e w i d t h s w c o a r s e d e l a y d e l a y 1 b i t 1 t o 2 c l k 1 b i t
? 4 CXA3266Q pin no. symbol description reference voltage level 1 iov cc digital power supply 5v 2 iognd digital gnd 0v 3 vcoh external vco input pecl 4 vcol external inverted vco input pecl 5 vco external vco input ttl 6 hold phase detector disable signal input ttl 7 synch sync input pecl 8 syncl inverted sync input pecl 9 sync sync input ttl 10 senable control signal (enable) ttl 11 sclk control signal (clock) ttl 12 sdata control signal (data) ttl 13 tload programmable counter test input ttl 14 cs chip select ttl 15 serout register read output ttl 16 divout programmable counter test output ttl 17 unlock unlock signal output ttl 18 dv cc digital power supply 5v 19 dgnd digital gnd 0v 20 clk/2n inverted 1/2 clock output ttl 21 clk/2 1/2 clock output ttl 22 clkn inverted clock output ttl 23 clk clock output ttl 24 dsync delay sync signal output ttl 25 ttlgnd ttl output gnd 0v 26 ttlv cc ttl output power supply 5v 27 iognd digital gnd 0v 28 peclv cc pecl output power supply 5v 29 clk/2l inverted 1/2 clock output pecl 30 clk/2h 1/2 clock output pecl 31 clkl inverted clock output pecl 32 clkh clock output pecl 33 dsyncl delay sync signal output pecl 34 dsynch inverted delay sync signal output pecl 35 vbb pecl reference voltage peclv cc ?1.7v 36 peclv cc pecl output power supply 5v 37 iognd digital gnd 0v 38 voclp ttl high level clamp clamp voltage 39 pllv cc pll circuit analog power supply 5v 40 pllgnd pll circuit analog gnd 0v 41 vcov cc vco circuit analog power supply 5v 42 vcognd vco circuit analog gnd 0v 43 vcohgnd vco sub analog gnd 0v 44 iref charge pump current preparation 1.2v 45 rc2 external pin for lpf 2.0 to 4.4v 46 rc1 external pin for lpf 2.1v 47 irgnd iref analog gnd 0v 48 irv cc iref analog power supply 5v
? 5 CXA3266Q pin description and i/o pin equivalent circuit digital power supply. ground this pin to the ground pattern with a 0.1 f ceramic chip capacitor as close to the pin as possible. digital gnd. digital power supply. digital gnd. ttl output gnd. ttl output power supply. ground this pin to the ground pattern with a 0.1 f ceramic chip capacitor as close to the pin as possible. digital gnd. pecl output power supply. ground this pin to the ground pattern with a 0.1 f ceramic chip capacitor as close to the pin as possible. pecl output power supply. ground this pin to the ground pattern with a 0.1 f ceramic chip capacitor as close to the pin as possible. digital gnd. pll circuit analog power supply. ground this pin to the ground pattern with a 0.1 f ceramic chip capacitor as close to the pin as possible. pll circuit analog gnd. vco circuit analog power supply. ground this pin to the ground pattern with a 0.1 f ceramic chip capacitor as close to the pin as possible. vco circuit analog gnd. vco sub analog gnd. iref analog gnd. iref analog power supply. ground this pin to the ground pattern with a 0.1 f ceramic chip capacitor as close to the pin as possible. 1 2 18 19 25 26 27 28 36 37 39 40 41 42 43 47 48 iov cc iognd dv cc dgnd ttlgnd ttlv cc iognd peclv cc peclv cc iognd pllv cc pllgnd vcov cc vcognd vcohgnd irgnd irv cc 5v 0v 5v 0v 0v 5v 0v 5v 5v 0v 5v 0v 5v 0v 0v 0v 5v pin no. symbol i/o reference voltage level equivalent circuit description
? 6 CXA3266Q external vco input. programmable counter test input (switchable by a control register). when using the vco pecl input, open the pin 5 vco ttl input. external inverted vco input. when open, this pin goes to the pecl threshold voltage (iovcc ?1.3v). only the pin 3 vcoh input with vcol input open can be also operated but complementary input is recommended in order to realize stable high-speed operation. sync input. when using the synch pecl input, open the pin 9 sync ttl input. the sync signal can be switched between positive/negative polarity by an internal register. inverted sync input. when open, this pin goes to the pecl threshold voltage (iovcc ?1.3v). only the pin 7 synch input with syncl input open can be also operated but complementary input is recommended in order to realize stable high-speed operation. 3 4 7 8 vcoh vcol synch syncl pecl pecl pecl pecl i i i i 3 4 8 7 i o v c c i o g n d 1 4 k 1 4 k 5 0 0 5 0 0 pin no. symbol i/o reference voltage level equivalent circuit description
? 7 CXA3266Q external vco input. programmable counter test input (controlled by a control register). when using the vco ttl input, open the pin 3 vcoh and pin 4 vcol pecl inputs. phase detector disable signal. active high. when this pin is high, the phase detector output is held. this pin goes to high level when open. (see the hold timing chart.) sync input. when using the sync ttl input, open the pin 7 synch and pin 8 syncl pecl inputs. the sync signal can be switched between positive/negative polarity by an internal register. control signal (enable) for setting the internal registers. when senable is low, registers can be written; when high, registers can be read. (see the control register table and control timing chart.) control signal (clock) for setting the internal registers. when senable is low, sdata is loaded to the registers at the rising edge of sclk. when senable is high, the register contents are output from serout at the falling edge of sclk. (see the control register table and control timing chart.) control signal (data) for setting the internal registers. (see the control register table and control timing chart.) programmable counter test input. this pin is normally open status and high. register contents can be loaded immediately to programmable counter by setting tload low during the programmable counter test mode. 5 6 9 10 11 12 13 vco hold sync senable sclk sdata tload ttl ttl ttl ttl ttl ttl ttl i i i i i i i 5 6 9 1 0 1 2 1 3 1 . 5 v i o v c c i o g n d 1 1 1 9 2 4 0 k pin no. symbol i/o reference voltage level equivalent circuit description
? 8 CXA3266Q chip select. when low, all circuits including the register circuit are set to the power saving mode. when high, all circuits are set to operating mode. ttl output high level clamp. the ttl high level voltage is clamped at the almost same value with the voltage applied to this pin. when this pin is open, ttl output high level is approximately 2.7v by dividing the internal resistor. 14 38 cs voclp ttl clamp voltage i i i o v c c i o g n d 1 4 1 9 2 4 0 k 3 8 t t l g n d t t l v c c 3 k 3 . 5 k pin no. symbol i/o reference voltage level equivalent circuit description
? 9 CXA3266Q register read output. when senable is high, the register contents are output from serout at the falling edge of sclk. (see the control register timing chart.) ttl output can be turned on/off (high impedance) by a control register. programmable counter test output. (see the i/o timing chart.) ttl output can be turned on/off (high impedance) by a control register. inverted 1/2 clock output. (see the i/o timing chart.) ttl output can be turned on/off (high impedance) by a control register. 1/2 clock output. (see the i/o timing chart.) ttl output can be turned on/off (high impedance) by a control register. inverted clock output. (see the i/o timing chart.) ttl output can be turned on/off (high impedance) by a control register. clock output. (see the i/o timing chart.) ttl output can be turned on/off (high impedance) by a control register. delay sync signal output. (see the i/o timing chart.) ttl output can be turned on/off (high impedance) and switched between positive/negative polarity by a control register. unlock signal output. this pin is an open collector output, and pulls in the current when a phase difference occurs. the unlock sensitivity can be adjusted by connecting a capacitor and resistors to this output appropriately. (see the unlock timing chart.) ttl output can be turned on/off (high impedance) by a control register. 15 16 20 21 22 23 24 17 serout divout clk/2n clk/2 clkn clk dsync unlock ttl ttl ttl ttl ttl ttl ttl ttl o o o o o o o o i o v c c i o g n d t t l v c c t t l g n d 1 5 2 0 2 1 2 2 2 3 2 4 1 6 1 0 0 k pin no. symbol i/o reference voltage level equivalent circuit description 1 7 t t l v c c i o g n d t t l g n d
? 10 CXA3266Q inverted 1/2 clock output. (see the i/o timing chart.) this pin requires an external pull- down resistor. when not used, connect to peclv cc without connecting a pull-down resistor. 1/2 clock output. (see the i/o timing chart.) this pin requires an external pull- down resistor. when not used, connect to peclv cc without connecting a pull-down resistor. inverted clock output. (see the i/o timing chart.) this pin requires an external pull- down resistor. when not used, connect to peclv cc without connecting a pull-down resistor. clock output. (see the i/o timing chart.) this pin requires an external pull- down resistor. when not used, connect to peclv cc without connecting a pull-down resistor. delay sync signal output. (see the i/o timing chart.) this pin requires an external pull- down resistor. when not used, connect to peclv cc without connecting a pull-down resistor. inverted delay sync signal output. (see the i/o timing chart.) this pin requires an external pull- down resistor. when not used, connect to peclv cc without connecting a pull-down resistor. 29 30 31 32 33 34 clk/2l clk/2h clkl clkh dsyncl dsynch pecl pecl pecl pecl pecl pecl o o o o o o i o g n d i o v c c 2 9 3 0 3 4 3 1 3 2 3 3 p e c l v c c pin no. symbol i/o reference voltage level equivalent circuit description
? 11 CXA3266Q pecl reference voltage. when used, ground this pin to the ground pattern with a 0.1 f ceramic chip capacitor as close to the pin as possible. charge pump current preparation. connect to gnd via an external resistor (3.0k ). ground this pin to the ground pattern with a 0.1 f ceramic chip capacitor as close to the pin as possible. external pin for lpf. see the recommended operating circuit for the external circuits. note that external resistors and capacitors should be metal film resistors and temperature compensation capacitors which are relatively unaffected by temperature change. external pin for lpf. see the recommended operating circuit for the external circuits. vbb iref rc2 rc1 o peclv cc ?.7v 1.2v 2.0 to 4.4v 2.1v 35 44 45 46 pin no. symbol i/o reference voltage level equivalent circuit description p e c l v c c i o g n d 3 5 i r v c c i r g n d 4 4 i o g n d i o g n d i r g n d i r v c c 4 5 4 6
? 12 CXA3266Q control register table register no. register 1 register 2 register 3 register 4 register 5 register 6 register 7 register name register read no divreg1 register read no divreg2 register read no cenfrereg register read no delayreg register read no cpreg register read no ttlpolreg register read no testpowreg data7 msb 1 vco div bit 7 15 coarse delay bit 1 29 unlock enable data6 2 vco div bit 6 16 coarse delay bit 0 30 dsync enable data5 3 vco div bit 5 17 fine delay bit 5 23 dsync delay 31 nclk/2 enable 37 dsync hold data4 4 vco div bit 4 18 fine delay bit 4 24 dsync width bit 1 32 clk/2 enable 38 dsync by-pass data3 5 vco div bit 3 9 vco div bit 11 19 fine delay bit 3 25 dsync width bit 0 33 nclk enable 39 divout enable data2 6 vco div bit 2 10 vco div bit 10 20 fine delay bit 2 26 pd pol 34 clk enable 40 read out power data1 7 vco div bit 1 11 vco div bit 9 13 div 1, 2, 4, 8 bit 1 21 fine delay bit 1 27 c.pump bit 1 35 dsync pol 41 synth power data0 lsb 8 vco div bit 0 12 vco div bit 8 14 div 1, 2, 4, 8 bit 0 22 fine delay bit 0 28 c.pump bit 0 36 sync pol 42 vco by-pass addr2 msb 0 0 0 1 1 1 1 addr1 0 1 1 0 0 1 1 addr0 lsb 1 0 1 0 1 0 1 data address
? 13 CXA3266Q electrical characteristics (ta = 25 c, v cc = 5v, gnd = 0v) current consumption (excluding output current) current consumption 1 current consumption 2 current consumption 3 digital input digital high level input voltage (pecl) digital low level input voltage (pecl) vcol, syncl input open voltage (pecl) digital high level input current (pecl) digital low level input current (pecl) digital high level input voltage (ttl) digital low level input voltage (ttl) digital high level input current (ttl) digital low level input current (ttl) hold characteristics rc1 input pin leak current hold signal set-up time hold signal hold time digital output digital high level output voltage (pecl) digital low level output voltage (pecl) pecl output reference voltage digital high level output voltage (ttl) digital low level output voltage (ttl) cs = h, synth power = 1 cs = h, synth power = 0 cs = l v ih = iov cc ?0.8v v il = iov cc ?1.6v v ih = 3.5v v il = 0.2v rl = 330 rl = 330 rl = 330 cl = 10pf cl = 10pf 51.0 9.0 1.2 iov cc ?.15 ?00 ?00 2.0 ?0 ?0 20 20 peclv cc ?.6 2.4 65.5 13.0 1.5 iov cc ?.3 peclv cc ?.7 79.0 16.0 1.8 iov cc ?.5 100 0 0.8 ? 0 1.00 peclv cc ?.8 0.5 ma ma ma v v v a a v v a a na ns ns v v v v v i cc 1 i cc 2 i cc 3 v ih 1 v il 1 v io i ih 1 i il 1 v ih 2 v il 2 i ih 2 i il 2 ileak ths thh v oh 1 v ol 1 vbb v oh 2 v ol 2 item symbol conditions min. typ. max. unit
? 14 CXA3266Q unlock output unlock output current sync input sync input frequency range dsync output dsync output coarse delay time setting resolution (upper) dsync output coarse delay time (upper) dsync output fine delay time setting resolution (lower) dsync output fine delay time (lower) dsync output divout output delay time vco characteristics div output frequency operation range 1 div output frequency operation range 2 div output frequency operation range 3 div output frequency operation range 4 vco lock range vco gain 1 vco gain 2 vco gain 3 vco gain 4 charge pump current 1 charge pump current 2 charge pump current 3 change pump current 4 vco counter bits div = 1/1 div = 1/2 div = 1/4 div = 1/8 div = 1/1 div = 1/2 div = 1/4 div = 1/8 c.pump bit = 00, iref = 3.0k c.pump bit = 01, iref = 3.0k c.pump bit = 10, iref = 3.0k c.pump bit = 11, iref = 3.0k ?0 10 2 8/32 4 40 20 10 5 2.0 300 150 75 37.5 62.5 125 250 500 2 6 480 240 120 60 100 200 400 800 12 120 5 48/32 5 203 100 50 25 4.4 700 350 175 87.5 137.5 275 550 1100 ma khz bit clk bit clk clk mhz mhz mhz mhz v mrad/sv mrad/sv mrad/sv mrad/sv a a a a bit iunlock fin rdsync1 td1 rdsync2 td2 td9 f vco 1 f vco 2 f vco 3 f vco 4 vlock k vco 1 k vco 2 k vco 3 k vco 4 kpd1 kpd2 kpd3 kpd4 rdiv2 item symbol conditions min. typ. max. unit
? 15 CXA3266Q clk (clk, clk/2) output clk output (pecl) frequency range 1 clk output (pecl) frequency range 2 clk output (pecl) frequency range 3 clk output (pecl) frequency range 4 clk, clk/2 output (pecl) rise time clk, clk/2 output (pecl) fall time clk output (ttl) frequency range 1 clk output (ttl) frequency range 2 clk output (ttl) frequency range 3 clk output (ttl) frequency range 4 clk, clk/2 output (ttl) rise time clk, clk/2 output (ttl) fall time clk output (pecl, ttl) duty sync input (pecl) and clk output (pecl) delay offset clk output (pecl) and dsync output (pecl) phase difference clk output (pecl) and clk/2 output (pecl) phase difference dsync, clk, clk/2 output (pecl) and ttl output phase difference div = 1/1 div = 1/2 div = 1/4 div = 1/8 10% to 90%, rl = 330 10% to 90%, rl = 330 div = 1/1 div = 1/2 div = 1/4 div = 1/8 10% to 90%, cl = 10pf 10% to 90%, cl = 10pf cl = 10pf cl = 10pf cl = 10pf cl = 10pf cl = 10pf 40 20 10 5 1.0 1.0 40 20 10 5 0.8 0.8 40 1.0 1.0 0.3 1.8 2.0 2.0 1.1 1.1 50 1.6 2.0 0.7 2.5 203 100 50 25 3.0 3.0 100 100 50 25 1.6 1.6 60 2.2 3.0 1.1 3.2 mhz mhz mhz mhz ns ns mhz mhz mhz mhz ns ns % ns ns ns ns fclk1pecl fclk2pecl fclk3pecl fclk4pecl trpecl tfpecl fclk1ttl fclk2ttl fclk3ttl fclk4ttl trttl tfttl dclk2 td3 td4 td5 td8 item symbol conditions min. typ. max. unit
? 16 CXA3266Q clk (clk, clk/2) output clk vs. sync output jitter (ntsc) clk vs. sync output jitter (vga) clk vs. sync output jitter (svga) clk vs. sync output jitter (xga) clk vs. sync output jitter (sxga) clk vs. sync output jitter (uxga) clk vs. dsync output jitter control registers sclk frequency senable set-up time senable hold time sdata set-up time sdata hold time senable set-up time senable hold time triggered at sync fsync = 15.73khz fclk = 12.27mhz n = 780 triggered at sync fsync = 31.47khz fclk = 25.18mhz n = 800 triggered at sync fsync = 48.08khz fclk = 50.00mhz n = 1040 triggered at sync fsync = 56.48khz fclk = 75.00mhz n = 1328 triggered at sync fsync = 80khz fclk = 136.00mhz n = 1700 triggered at sync fsync = 93.75khz fclk = 202.50mhz n = 2160 triggered at dsync in write/read mode in write mode in write mode in write mode in read mode in read mode in read mode 1.8 1.2 1.0 0.9 0.7 0.5 3 0 3 0 3 0 2.5 1.5 1.4 1.3 1.0 0.8 4.0 1.9 1.7 1.6 1.4 1.0 0.1 12 ns ns ns ns ns ns ns mhz ns ns ns ns ns ns tj1p-p tj2p-p tj3p-p tj4p-p tj5p-p tj6p-p tj7p-p sclk tens tenh tds tdh tnens tnenh item symbol conditions min. typ. max. unit
? 17 CXA3266Q description of block diagram sync input sync signals in the range of 10 to 120khz can be input. input supports both positive and negative polarity. pecl input can also be a single input. when sync is positive polarity, the clock is regenerated in synchronization with the rising edge of the sync signal. when sync is negative polarity, the clock is regenerated in synchronization with the falling edge of the sync signal. vco oscillation stops when there is no sync input. register: sync pol sync input polarity 1 positive 0 negative phase detector the phase detector operates at the sync input frequency of 10 to 120khz. the pd input polarity should be set to the default pd pol = 1. phase comparison is performed at the edges. the input circuit of the phase detector does not contain a hysteresis circuit, so the waveform must be shaped at the front end of the CXA3266Q when inputting a noisy signal. the phase detector hold signal is supplied by ttl. (see the hold timing chart.) the pll unlock signal is output by an open collector. (see the unlock timing chart.) charge pump the gain (i, i/2, i/4, i/8) can be varied by changing the charge pump current using 2 bits of control register. register: c.pump bit 1 register: c.pump bit 0 0 0 1 0 1 1 charge pump current 100 a 0 1 200 a 400 a 800 a register: div 1, 2, 4, 8 bit 1 register: div 1, 2, 4, 8 bit 0 0 0 0 1 1 0 counter frequency divisions 1/1 1/2 1/4 1 1 1/8 lpf this is a loop filter comprised of the external capacitors and resistor. be sure to use metal film resistors with little temperature variation and a temperature-compensated capacitor. in particular, the 0.068 f capacitor should be equivalent to high dielectric constant series capacitor type b or better. (electrostatic capacitance change ratio 10%: t = ?5 to +85 c) vco the vco oscillator frequency covers from 40 to 203mhz. vco rear-end counter the vco output is frequency divided to 1/1, 1/2, 1/4 or 1/8 by switching 2 bits of control register. the operating range can be expanded to 5 to 203mhz by combining the counter with a vco frequency divider.
? 18 CXA3266Q feedback programmable counter this counter can be set as desired from 256 to 4096 using 12 bits. frequency divisions = (m + 1) 8 + n, n: 3 bits (vco div bits 0 to 2), m: 9 bits (vco div bits 3 to 11) when the register value is changed, the new setting is actually loaded to the counter when the counter value becomes "all 0". clock output when sync input is positive polarity, the clock is regenerated in synchronization with the rising edge of the sync signal. the clock output delay time can be changed in the range of 8/32 to 48/32 clk using 6 bits of control register. (see the i/o timing chart.) output is ttl and pecl (complementary), and supports both positive and negative polarity. clock ttl output can also be turned off independently. register: clock enable clock output status 1 on 0 off register: clock enable clock output status 1 on 0 off register: dsync pol dsync output polarity 1 positive 0 negative lower delay line fine delay bits 0 to 5 delay time 000111 8/32clk 001000 9/32clk ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 101111 48/32clk upper delay line coarse delay bits 0 to 1 delay time 00 2clk 01 3clk 10 4clk 11 5clk delay sync output the front edge of the delay sync pulse is latched by the pulse obtained by frequency dividing the clk regenerated by the pll, so there is almost no jitter with respect to clk. this front edge can be used as the reset signal for the system timing circuit. the rear edge of the delay sync pulse is latched by the clk regenerated by the pll. this relationship is undefined for one clock as shown in the timing chart. the delay sync output delay time can be varied in two stages. first, the delay time can be varied in the range of 8/32 to 48/32 clk using 6 bits of control register, and then in the range of 2 to 5 clk using 2 bits of control register. in other words, the total delay time is ((8/32 to 48/32) + (2 to 5)) clk. (see the i/o timing chart.) dsync output is ttl and pecl (complementary), and supports both positive and negative polarity. clock ttl output can also be turned off. 1/2 clock output reset is performed at the delay sync timing and the clock output is frequency divided by 1/2. (see the i/o timing chart.) both odd and even output are ttl and pecl output. ttl output can also be turned off independently. register: clock enable clock output status 1 on 0 off
? 19 CXA3266Q register: dsync width dsync width 00 1clk 01 2clk 10 4clk 11 8clk delay sync output width (dsync by-pass = 0) delay sync output pulse width can be varied to 1, 2, 4, or 8clk by switching 2 bits of control register. register: dsync by-pass output status from dsync 0 divout output 1 dsync output programmable counter ttl output switching output (pecl, ttl) from dsync output is possible by switching of control register. register: dsync delay delay time 0 4clk 1 5clk delay sync output delay (dsync by-pass = 0) divout output delay from delay sync output can be varied to 4 or 5clk by switching of control register. register dsync hold register dsync by-pass register dsync pol pin 6 hold output from dsync (pin 24) and dsynch (pin 34) 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 h l h l h l h l h l h l h l h l dsync output switching during hold by switching with a control register, dsync output during hold period is controlled. its output status is different according to dsync by-pass, dsync pol and hold signals of the register. the output for each setting is shown below. h divout l divout h dsync l dsync divout divout divout divout dsync dsync dsync dsync
? 20 CXA3266Q control circuit (3-bit address, 8-bit data) the timing and input methods are described hereafter. feedback programmable counter control register1, 2 12bit vcodiv bit0 to 11 vco rear-end counter control register3 2bit div1, 2, 4, 8 bit0, bit1 fine delay line control register4 6bit fine delay bit0 to 5 coarse delay line control register4 2bit coarse delay bit0, bit1 charge pump current dac control register5 2bit c.pump bit0, bit1 phase detector input positive/negative polarity control register5 1bit pd pol delay sync output width control register5 2bit dsync width delay sync output delay control register5 1bit dsync delay sync input positive/negative polarity control register6 1bit sync pol delay sync output positive/negative polarity control register6 1bit dsync pol clock ttl output off function register6 1bit clk enable inverted clock ttl output off function register6 1bit nclk enable 1/2 clock ttl output off function register6 1bit clk/2 enable inverted 1/2 clock ttl output off function register6 1bit nclk/2 enable delay sync ttl output off function register6 1bit dsync enable unlock output off function register6 1bit unlock enable programmable counter input switching register7 1bit vco by-pass power save with register contents held register7 1bit synth power register read function power on/off register7 1bit read out power programmable counter ttl output off function register7 1bit divout enable programmable counter ttl output switching register7 1bit dsync by-pass delay sync output hold function register7 1bit dsync hold power save the CXA3266Q realizes 2-step power saving (all off, control registers only on). this is controlled by a control register and the chip selector. step 1: chip selector control cs power saving status h power on l all off register: synth power power saving status 1 power on 0 control registers only on step 2: control register control readout circuit (during test mode) the control register contents can be read by serial data from serout. (see the control register timing chart.) register: read out power readout status 0 function off 1 function on
? 21 CXA3266Q register: divout enable divout output status 0 off 1 on register: vco by-pass input status 1 internal vco 0 external input tload forced load control status h function off l function on programmable counter output (during test mode) the programmable counter output is ttl output from the divout pin. (see the i/o timing chart.) this output is normally not used. tload input (during test mode) this control signal forcibly loads the control register contents to the programmable counter. this signal is normally not used. vco input (during test mode) this is the programmable counter test signal input pin. this pin can be switched internally by the mux circuit. ttl and pecl input are possible. this pin is normally not used.
? 22 CXA3266Q control register timing 1) write mode many functions of the CXA3266Q can be controlled via a program. characteristics are changed by setting the internal control register values via a serial interface comprised of three pins: senable (pin 10), sclk (pin 11) and sdata (pin 12). the write timing diagram is shown below. input the 8-bit data and 3-bit register address msb first to the sdata pin. some registers are not 8 bits, but the data is input aligned with the lsb side in these cases. (see the register table.) senable is the enable signal and is active low. sclk is the transfer clock signal, and data is loaded to the ic at the rising edge. when senable rises, sclk must be high. (registers are set at the rising edge of senable.) when senable falls, sclk may be either high or low. s e n a b l e s d a t a s c l k s e n a b l e s d a t a s c l k d a t a 8 b i t a d d r e s s 3 b i t e n l a r g e d t e n s t e n h t d h t d s e n l a r g e d for example, when inputting a 16-bit signal, the initial 5 bits are invalid and the latter 11 bits are valid. this is to say that the latter 11 bits are loaded to the register. s e n a b l e s d a t a s c l k d a t a 8 b i t a d d r e s s 3 b i t i n v a l i d d a t a 5 b i t
? 23 CXA3266Q the settings of the frequency divider (2 bits, div1, 2, 4, 8) and programmable counter (12 bits, vcodiv) at the rear end of the vco are transferred in the order shown below. (the data will be set when the three registers are transferred.) first divreg2, cenfrereg and divreg1 are set, and then the data is transferred independently at the timings shown below. divreg2 (upper 4 bits of vcodiv) cenfrereg (2 bits of div1, 2, 4, 8) divreg1 (lower 8 bits of vcodiv) all three of the above registers must be changed even when changing only (2 bits of div1, 2, 4, 8). this is the same when changing only (12 bits of vcodiv). s e n a b l e s d a t a s c l k d i v r e g 2 c e n f r e r e g d i v r e g 1
? 24 CXA3266Q 2) read mode data can be transferred from the shift register to the data register only when senable is high. binary data can be read from the data register by inputting sclk when senable is high. data is loaded from the data register to the scan path circuit each time one clock is input to sclk, and is output sequentially from the register read no. 1 data (vcodiv bit 7) through the serout pin. when the 42nd sclk clock pulse is input, the register read no. 42 data (vco by-pass) is output. then, when the 43rd clock pulse is input to sclk, the output returns to the register read no. 1 data (vcodiv bit 7) and the data output is repeated. also, the data output from the scan path circuit is automatically reloaded even when the shift register data is changed during data output. note) since all registers do not have 8 bits, only the valid bits of each register are loaded to the scan path circuit. (see the control register table for the actual register read no.) s e r o u t i / p s h i f t r e g i s t e r , 1 1 b i t s 8 b i t d a t a 3 b i t a d d r e s s c l k n e n t r e n c l k s c l k s e n a b l e 7 d a t a r e g i s t e r s ( 4 2 l a t c h e s ) . r e g i s t e r s a r e d i f f e r e n t l e n g t h s u p t o 8 b i t s c a n p a t h , 1 e l e m e n t p e r r e g i s t e r b i t t n e n s t n e n h r e a d n o . 1 r e a d n o . 2 r e a d n o . n n 1 2 s e n a s e r o u t s c l k block diagram during read mode timing chart during read mode
? 25 CXA3266Q timing chart (td1 = 2clk) 0 1 2 3 4 t d 3 ( t y p . 2 n s ) 5 c l k s y n c i / p ( + v e p o l ) ( p e c l ) c l k o / p ( p e c l ) d s y n c o / p ( + v e p o l ) ( d s y n c b y - p a s s = 1 ) ( p e c l ) r e s e t ( i n t e r n a l s i g n a l ) d s y n c o / p ( + v e p o l ) ( d s y n c b y - p a s s = 0 , d s y n c d e l a y = 0 ) ( p e c l ) c l k / 2 o / p ( n = e v e n ) ( p e c l ) a / d c o n v e r t e r 1 / 2 c l k o / p ( t t l ) a / d c o n v e r t e r p 1 & p 2 o / p ( t t l ) d s y n c o / p ( + v e p o l ) ( d s y n c b y - p a s s = 0 , d s y n c d e l a y = 1 ) ( p e c l ) c l k / 2 o / p ( n = o d d ) ( p e c l ) 1 c l k t d 2 = 1 / 3 2 t o 6 4 / 3 2 c l k t d 4 ( t y p . 2 . 0 n s ) t d 1 = 2 c l k t d 9 = 4 c l k t d 9 = 5 c l k 1 , 2 , 4 , 8 c l k 1 , 2 , 4 , 8 c l k t d 5 ( t y p . 0 . 7 n s ) t d 5 ( t y p . 0 . 7 n s )
? 26 CXA3266Q timing chart (td1 = 3clk) 0 1 2 3 4 t d 3 ( t y p . 2 n s ) 5 c l k s y n c i / p ( + v e p o l ) ( p e c l ) c l k o / p ( p e c l ) d s y n c o / p ( + v e p o l ) ( d s y n c b y - p a s s = 1 ) ( p e c l ) r e s e t ( i n t e r n l s i g n a l ) d s y n c o / p ( + v e p o l ) ( d s y n c b y - p a s s = 0 , d s y n c d e l a y = 0 ) ( p e c l ) c l k / 2 o / p ( n = e v e n ) ( p e c l ) a / d c o n v e r t e r 1 / 2 c l k o / p ( t t l ) a / d c o n v e r t e r p 1 & p 2 o / p ( t t l ) d s y n c o / p ( + v e p o l ) ( d s y n c b y - p a s s = 0 , d s y n c d e l a y = 1 ) ( p e c l ) c l k / 2 o / p ( n = o d d ) ( p e c l ) 1 c l k t d 9 = 4 c l k t d 9 = 5 c l k 1 , 2 , 4 , 8 c l k 1 , 2 , 4 , 8 c l k t d 2 = 1 / 3 2 t o 6 4 / 3 2 c l k t d 1 = 3 c l k t d 4 ( t y p . 2 . 0 n s ) t d 5 ( t y p . 0 . 7 n s ) t d 5 ( t y p . 0 . 7 n s )
? 27 CXA3266Q timing chart (td1 = 4clk) 0 1 2 3 4 t d 3 ( t y p . 2 n s ) 5 c l k s y n c i / p ( + v e p o l ) ( p e c l ) c l k o / p ( p e c l ) d s y n c o / p ( + v e p o l ) ( d s y n c b y - p a s s = 1 ) ( p e c l ) r e s e t ( i n t e r n a l s i g n a l ) d s y n c o / p ( + v e p o l ) ( d s y n c b y - p a s s = 0 , d s y n c d e l a y = 0 ) ( p e c l ) c l k / 2 o / p ( n = e v e n ) ( p e c l ) a / d c o n v e r t e r 1 / 2 c l k o / p ( t t l ) a / d c o n v e r t e r p 1 & p 2 o / p ( t t l ) d s y n c o / p ( + v e p o l ) ( d s y n c b y - p a s s = 0 , d s y n c d e l a y = 1 ) ( p e c l ) c l k / 2 o / p ( n = o d d ) ( p e c l ) 1 c l k t d 1 = 4 c l k t d 4 ( t y p . 2 . 0 n s ) 1 , 2 , 4 , 8 c l k 1 , 2 , 4 , 8 c l k t d 9 = 4 c l k t d 9 = 5 c l k t d 5 ( t y p . 0 . 7 n s ) t d 5 ( t y p . 0 . 7 n s ) t d 2 = 1 / 3 2 t o 6 4 / 3 2 c l k
? 28 CXA3266Q timing chart (td1 = 5clk) 0 1 2 3 4 t d 3 ( t y p . 2 n s ) 5 c l k s y n c i / p ( + v e p o l ) ( p e c l ) c l k o / p ( p e c l ) d s y n c o / p ( + v e p o l ) ( d s y n c b y - p a s s = 1 ) ( p e c l ) r e s e t ( i n t e r n a l s i g n a l ) d s y n c o / p ( + v e p o l ) ( d s y n c b y - p a s s = 0 , d s y n c d e l a y = 0 ) ( p e c l ) c l k / 2 o / p ( n = e v e n ) ( p e c l ) a / d c o n v e r t e r 1 / 2 c l k o / p ( t t l ) a / d c o n v e r t e r p 1 & p 2 o / p ( t t l ) d s y n c o / p ( + v e p o l ) ( d s y n c b y - p a s s = 0 , d s y n c d e l a y = 1 ) ( p e c l ) c l k / 2 o / p ( n = o d d ) ( p e c l ) 1 c l k t d 1 = 5 c l k t d 4 ( t y p . 2 . 0 n s ) 1 , 2 , 4 , 8 c l k 1 , 2 , 4 , 8 c l k t d 9 = 4 c l k t d 9 = 5 c l k t d 5 ( t y p . 0 . 7 n s ) t d 5 ( t y p . 0 . 7 n s ) t d 2 = 1 / 3 2 t o 6 4 / 3 2 c l k
? 29 CXA3266Q 2. hold timing a a a a a a a a a t h h t h s t h h t h s t h o l d t h e p h a s e c o m p a r i s o n o u t p u t i s h e l d a n d f i x e d v c o o u t p u t f r e q u e n c y i s o u t p u t . d i v o u t o u t p u t ( t t l ) s y n c i n p u t ( s y n c p o l = 0 ) c l k o u t p u t h o l d i n p u t ( t t l ) s y n c i n p u t ( s y n c p o l = 1 ) hold signal set-up time (ths) is a time from the rising edge of hold signal to the falling edge of divout. or, when sync pol = 1, it is a time from the falling edge of hold signal to the rising edge of sync; when sync pol = 0, it is the time from the falling edge of hold signal to the falling edge of sync. hold signal hold time (thh) is the time from the falling edge of divout to falling edge of hold signal. or, when sync pol = 1, it is the time from the rising edge of sync to the rising edge of hold signal; when sync pol = 0, it is the time from the falling edge of sync to the rising edge of hold signal. when the hold input is held, the clk frequency fluctuation can be calculated as follows. v c o i i s w s w c q + q d v i l e a k d f c ? ? v = q = i leak ?t hold c: loop filter capacitance ? v: voltage variation due to leak current i leak : internal amplifier leak current t hold : hold time ? v = i leak ?t hold /c ? f = ? v ?kvco = i leak ?t hold /c ?kvco for example, assuming f = 100mhz, i leak = 1na, t hold = 1ms, c = 0.068 f, and kvco = 2 ?75mhz, then: ? v = 1 10 ? ?1 10 ? /(0.068 10 ? ) = 15 10 ? [v] ? f = 1 10 ? ?1 10 ? /(0.068 10 ? ) ?75 10 6 = 1125 [hz]
? 30 CXA3266Q 3. relationship between sync input and dsync output during hold j k q q c k c l k d s y n c i n t e r n a l s i g n a l s y n c i n t e r n a l s i g n a l d i v o u t n i n t e r n a l s i g n a l when the above sync internal and divoutn internal signals are input, the dsync internal signal is output as shown in the table below. 1. dsync = l when sync = l and divoutn = l. 2. dsync = h * or l * (unchanged with the previous data) when sync = h and divoutn = l. 3. dsync = h when divoutn = h (sync = h or l) sync l h l l l l l l h l l h l h l l h l * * * l l h h l h * * * l l h h l h * * * l h l h l l h h divoutn j k q q dsync ( * ) is unchanged with the previous data. (1) (2) (3) (4) (5) (6) s y n c i n t e r n a l s i g n a l d i v o u t n i n t e r n a l s i g n a l d s y n c i n t e r n a l s i g n a l ( 1 ) ( 5 ) ( 6 ) ( 4 ) ( 2 ) ( 3 )
? 31 CXA3266Q during hold, the output from dsync can be controlled by register dsync hold. its output status differs according to the dsync polarity or dsync by-pass switching. the below diagrams show the relationship with dsync output for each sync input. (dsync pol = 1 for all of case1 to case3.) case1 h s y n c ( s y n c p o l = 1 ) h o l d i n p u t ( 1 ) d u r i n g d s y n c h o l d o n ( d s y n c h o l d = 1 ) ( 2 ) d u r i n g d s y n c h o l d o f f ( d s y n c h o l d = 0 ) d s y n c b y - p a s s = 1 d s y n c b y - p a s s = 0 d s y n c b y - p a s s = 1 d s y n c b y - p a s s = 0 h s y n c ( s y n c p o l = 1 ) h o l d i n p u t ( 1 ) d u r i n g d s y n c h o l d o n ( d s y n c h o l d = 1 ) ( 2 ) d u r i n g d s y n c h o l d o f f ( d s y n c h o l d = 0 ) d s y n c b y - p a s s = 1 d s y n c b y - p a s s = 0 d s y n c b y - p a s s = 1 d s y n c b y - p a s s = 0 case2
? 32 CXA3266Q h s y n c ( s y n c p o l = 1 ) h o l d i n p u t ( 1 ) d u r i n g d s y n c h o l d o n ( d s y n c h o l d = 1 ) ( 2 ) d u r i n g d s y n c h o l d o f f ( d s y n c h o l d = 0 ) d s y n c b y - p a s s = 1 d s y n c b y - p a s s = 0 d s y n c b y - p a s s = 1 d s y n c b y - p a s s = 0 case3
? 33 CXA3266Q 4. unlock timing u n l o c k d e t e c t u n l o c k v c c s i g n a l f r o m p h a s e c o m p a r a t o r c r 1 r 2 s 2 i 2 i 1 s 1 o u t s i d e t h e i c i n s i d e t h e i c the unlock detect output is an open collector. when unlock detect output s1 goes high, the current i1 is pulled in. the unlock sensitivity can be adjusted by connecting external resistors (r1, r2) and a capacitor (c) to this output pin appropriately and changing these values. operation during three modes is described below. case 1: when there is no phase difference, that is to say, when the pll is locked. the s1 signal is low and the s2 signal is high. the unlock output remains low. s 1 s 2 u n l o c k t h r e s h o l d l e v e l case 2: when there is a phase difference, that is to say, when the s1 signal goes high and low as shown in the figure below, the fall slew rate of the s2 signal is determined by the current i1 flowing into that open collector. therefore, increasing the resistance r1 causes the s2 signal fall slew rate to become slower. also, since the s2 signal rise slew rate is determined by the current i2, reducing the resistance r2 causes the s2 signal rise slew rate to become faster. if this integrated s2 signal does not fall below the threshold level of the next inverter, the unlock signal stays low, and the pll is said to be locked. s 1 s 2 u n l o c k t h r e s h o l d l e v e l case 3: however, even if a phase difference exists as shown above, if the resistance r1 is reduced, the current i1 flowing into the open collector increases, and the s2 signal fall slew rate becomes faster. also, if the resistance r2 is increased, the s2 signal rise slew rate becomes slower. if this integrated s2 signal falls below the threshold level of the next inverter, the unlock signal goes from low to high, and the pll is said to be unlocked. s 1 s 2 u n l o c k t h r e s h o l d l e v e l
? 34 CXA3266Q charge pump and loop filter settings the CXA3266Q's charge pump is a constant-current output type as shown below. s 1 s 2 t o l p f v c c when a constant-current output charge pump circuit is used inside the pll, the phase detector output acts as a current source, and the dimension of its transmittance kpd is a/rad. also, when considering the vco input as a voltage, the lpf transmittance dimension must be expressed in ohms ( = v/a). therefore, the pll transmittance when a constant-current output charge pump circuit is used is as follows. 1 / s k p d ( a / r a d ) f ( s ) ( w ) k v c o ( r a d / s v ) 1 / s 1 / n p d l p f v c o c o u n t e r q o n w 0 w 0 / n q r w r + the pll closed loop transmittance is obtained by the following formula. here, kpd, f (s), and kvco are: kpd: phase comparator gain (a/rad) f (s): loop filter transmittance ( ) kvco: vco gain (rad/sv) * 1 the reason for the 1/s inside the phase detector is as follows. q o (t)/n = t o w 0 (t)/ndt + q o (t = 0)/n ... (a) if q o (t = 0) = 0 , q o (t)/n = t o w 0 (t)/ndt ... (b) performing laplace conversion: q o (s)/n = w 0 (s)/n ... (c) 1 s q o/n q r kpd ?f (s) ?kvco 1/n ?1/s 1 + kpd ?f (s) ?kvco 1/n ?1/s = ... (1)
? 35 CXA3266Q the loop filter f (s) is described below. the loop filter smoothes the output pulse from the phase comparator and inputs it as the dc component to the vco. in addition to this, however, the loop filter also plays an important element in determining the pll response characteristics. typical examples of loop filters include lag filters, lag-lead filters, active filters, etc. however, the CXA3266Q's lpf is a current input type active filter as shown below, so the following calculations show an actual example of deriving the pll closed loop transmittance when using this type of filter and then using this transmittance to create a formula for setting the filter constants. current input type active filter v o c r i i v o 1 a the filter transmittance is as follows. + vo = (r + ) f (s) = = \t = rc here, assuming a > 1, then: f (s) = ........................... (2) next, substituting (2) into (1) and obtaining the overall closed loop transmittance for the pll: = ... (3) = ............................................ (4) w n = ...................................................... (5) z = w n t ................................................................. (6) the bode diagram for formula (2) is as follows. l o g w l o g w 4 5 d e g 0 9 0 p h a s e [ d e g ] l o g s c a l e g a i n [ d b ] 1 t 2 zw ns + w n 2 s 2 + 2 zw ns + w n 2 1 + src sc a 1 + a 1 + s t sc q o/n q r ?s + 1 + s t sc a 1 + a kpd ?kvco ? t nc kpd ?kvco nc ?s + s 2 + kpd ?kvco ? t nc kpd ?kvco nc kpd ?kvco nc vo a 1 sc 1 2
? 36 CXA3266Q here, w n and z are as follows. w n characteristic angular frequency: the oscillatory angular frequency when pll oscillation is assumed to have been maintained by the loop filter and individual loop gains is called the characteristic angular frequency: w n. z damping factor: this is the pll transient response characteristic, and serves as a measure of the pll stability. it is determined by the loop gain and the loop filter. a capacitor c2 is added to the actual loop filter. this added capacitor c2 is used to reduce the r noise, and a value of around 1/10 to 1/1000 of c1 should be selected as necessary. current input type active filter with added capacitor c2 v o c 2 c 1 r i i v o 1 a the filter transmittance is as follows. f (s) = = .................. (7) t 1 = c1 ?r t 2 = here, assuming c2 = c1/100, then: t 2 = = c1 ?r = t 1 the bode diagram for formula (7) is as follows. 1 t 1 l o g w l o g w 4 5 d e g 0 9 0 p h a s e [ d e g ] l o g s c a l e g a i n [ d b ] 1 t 2 1 + c1 r ?s s ((c1 + c2) + c1 ?c2 ?r ?s) 1 + t 1 ?s s (c1 + c2) (1 + t 2 ?s) c1 ?c2 ?r c1 + c2 c1 ?c1/100 ?r c1 + c1/100 1 101 1 101
? 37 CXA3266Q next, the various parameters inside an actual CXA3266Q are obtained. the CXA3266Q's charge pump output block and the lpf circuit are as follows. s 1 s 2 t o v c o v c c c 2 c 1 r 1 3 3 3 c x a 3 2 6 6 q 1 0 0 2 0 k 1 0 0 a o r 2 0 0 a o r 4 0 0 a o r 8 0 0 a 1 0 0 a o r 2 0 0 a o r 4 0 0 a o r 8 0 0 a 4 5 4 6 first, kpd is as follows. kpd = 100 /2 or 200 /2 or 400 /2 or 800 /2 (a/rad) typical kvco characteristics curves for the CXA3266Q's internal vco are as follows. 2 3 4 5 0 1 0 0 1 5 0 v c o i n p u t v o l t a g e [ v ] v c o f r e q u e n c y [ m h z ] v c o d i v = 1 / 1 v c o d i v = 1 / 2 v c o d i v = 1 / 4 2 0 0 2 5 0 0 v c o d i v = 1 / 8 therefore, kvco is as follows. kvco = 2 ?75m or 2 ?37.5m or 2 ?18.75m or 2 ?9.375m (rad/sv)
? 38 CXA3266Q w n and z calculated for various types of computer signals are shown below. here, the various parameters are as follows. fsync: input h sync frequency fclk: output clock frequency kpd 2 : phase comparator gain 2 (kpd 2 = +100 or 200 or 400 or 800) kvco/2 : vco gain (when vco div = 1/1, kvco/2 = 75) (when vco div = 1/2, kvco/2 = 75/2) (when vco div = 1/4, kvco/2 = 75/4) (when vco div = 1/8, kvco/2 = 75/8) n: counter value c1: loop filter capacitance value r1: loop filter resistance value ntsc ntsc ntsc pal pal pal pc-98 vga mac vesa svga svga svga svga svga mac xga xga xga mac xga sxga sxga sxga sxga uxga uxga resolution mode 640 400 640 480 640 480 640 480 800 600 800 600 800 600 800 600 800 600 832 624 1024 768 1024 768 1024 768 1024 768 1024 768 1280 1024 1280 1024 1280 1024 1280 1024 1600 1200 1600 1200 hsync khz 15.73 15.73 15.73 15.63 15.63 15.63 24.82 31.47 35.00 37.86 35.16 37.88 46.88 48.08 53.67 49.72 48.36 56.48 60.02 60.24 68.68 46.43 63.98 79.98 91.15 81.23 93.72 fclk mhz 12.27 18.41 24.55 14.69 22.03 29.38 21.05 25.18 30.24 31.50 36.00 40.00 49.51 50.00 56.25 57.28 65.00 75.01 78.75 80.00 94.50 78.75 108.00 135.01 156.96 175.46 202.44 kpd 2 a 400 400 800 400 800 400 400 400 400 400 400 400 400 400 400 400 400 400 400 400 400 400 400 400 400 800 800 n setting 780 1170 1560 940 1410 1880 848 800 864 832 1024 1056 1056 1040 1048 1152 1344 1328 1312 1328 1376 1696 1688 1688 1722 2160 2160 c1 f 0.068 0.068 0.068 0.068 0.068 0.068 0.068 0.068 0.068 0.068 0.068 0.068 0.068 0.068 0.068 0.068 0.068 0.068 0.068 0.068 0.068 0.068 0.068 0.068 0.068 0.068 0.068 r1 k 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 fn khz 1.34 1.09 1.34 1.22 1.41 1.22 1.28 1.32 1.80 1.83 1.65 1.63 1.63 1.64 2.31 2.20 2.04 2.05 2.06 2.05 2.02 1.82 2.57 2.57 2.55 3.22 3.22 z 0.86 0.70 0.86 0.78 0.90 0.78 0.82 0.85 1.15 1.17 1.06 1.04 1.04 1.05 1.48 1.41 1.31 1.31 1.32 1.31 1.29 1.16 1.65 1.65 1.63 2.06 2.06 c.pump setting bit1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 kvco/2 m/(s v) 75/8 75/8 75/8 75/8 75/8 75/4 75/8 75/8 75/4 75/4 75/4 75/4 75/4 75/4 75/2 75/2 75/2 75/2 75/2 75/2 75/2 75/2 75/1 75/1 75/1 75/1 75/1 bit0 0 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 div1, 2, 4, 8 setting bit1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 bit0 1 1 1 1 1 0 1 1 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 w n khzrad 8.41 6.87 8.41 7.66 8.84 7.66 8.06 8.30 11.30 11.51 10.38 10.22 10.22 10.30 14.51 13.84 12.81 12.89 12.97 12.89 12.66 11.40 16.17 16.17 16.01 20.21 20.21
? 39 CXA3266Q clk jitter evaluation method the regenerated clk is obtained by applying hsync to the CXA3266Q. apply this clk to a digital oscilloscope and observe the clk waveform using hsync as the trigger. c x a 3 2 6 6 q t r i g g e r p u l s e g e n e r a t o r c h 1 c l k h s y n c h s y n c b a c k p o r c h f r o n t p o r c h a c t i v e v i d e o t s y n c = 1 / f s y n c e n l a r g e d e n l a r g e d e n l a r g e d e n l a r g e d c l k t j p - p t r i g g e r c l k h s y n c d i g i t a l o s c i l l o - s c o p e 1 5 t o 2 5 % o f t s y n c c o m p u t e r s i g n a l the clk jitter is measured at peak to peak in the long-term write mode of the digital oscilloscope as shown in the figure. the clk jitter size varies according to the difference in the relative position with respect to hsync. therefore, when the observation point is changed, the clk jitter at that point is observed. the figure below shows an typical example of the clk jitter for the CXA3266Q. the clk jitter increases slightly at the rising edge of hsync (in the case of positive polarity), and then settles down thereafter. however, this is not a problem as the active pixels start after about 20% of the h cycle has passed from the rising edge of hsync. 0 1 / 4 t s y n c 2 / 4 t s y n c 3 / 4 t s y n c t s y n c o b s e r v a t i o n p o i n t s j i t t e r a m o u n t [ t j p - p ]
? 40 CXA3266Q 1 . 5 2 . 0 2 . 5 4 . 0 4 . 5 3 . 0 3 . 5 0 5 0 1 0 0 1 5 0 2 0 0 2 5 0 o u t p u t f r e q u e n c y [ m h z ] v c o c o n t r o l v o l t a g e [ v ] k v c o c h a r a c t e r i s t i c s d i v = 1 / 1 1 . 5 2 . 0 2 . 5 4 . 0 4 . 5 3 . 0 3 . 5 0 5 0 1 0 0 1 5 0 2 0 0 o u t p u t f r e q u e n c y [ m h z ] v c o c o n t r o l v o l t a g e [ v ] k v c o t e m p e r a t u r e c h a r a c t e r i s t i c s 2 5 0 t a = + 7 5 c t a = + 2 5 c t a = 2 5 c d i v = 1 / 2 d i v = 1 / 4 d i v = 1 / 8 f i n e d e l a y t d 2 v s . f i n e d e l a y b i t f i n e d e l a y b i t 8 4 8 1 6 3 2 8 2 4 3 2 4 8 f i n e d e l a y t d 2 [ 1 / 3 2 c l k ] 1 6 4 0 2 4 4 0 t a = + 7 5 c t a = + 2 5 c t a = 2 5 c j i t t e r p e a k - p e a k v s . o u t p u t f r e q u e n c y o u t p u t f r e q u e n c y [ m h z ] 0 2 0 1 0 0 0 1 . 0 1 . 5 2 . 5 j i t t e r p e a k - p e a k [ n s ] 0 . 5 2 . 0 4 0 1 4 0 6 0 8 0 1 2 0 1 6 0 1 8 0 2 0 0 2 2 0 n t s c , d i v = 1 / 8 , c p = 1 0 , 1 1 v g a , d i v = 1 / 8 , 1 / 4 , c p = 1 0 s v g a , d i v = 1 / 4 , c p = 1 0 x g a , d i v = 1 / 2 , c p = 1 0 s x g a , d i v = 1 / 1 , c p = 1 0 u x g a , d i v = 1 / 1 , c p = 1 1 example of representative characteristics
? 41 CXA3266Q notes on operation be sure not to separate the analog and digital power supplies, and the analog and digital gnd. the ground pattern should be as wide as possible. using a multi-layer substrate with a mat ground is recommended. ground the power supply pins of the ic with a 0.1 f or larger ceramic chip capacitor as close to each pin as possible. be sure to accurately match the i/o characteristic impedance in order to ensure sufficient performance during high-speed operation. design the set so that the loop filter (external) is located at the minimum distance. (see the CXA3266Q pwb.) the voltage applied to voclp pin must be supplied from the stabilized power supplies (3-pin regulator etc.) because of the construction of internal circuit.
? 42 CXA3266Q (1) recommended pecl i/o circuit the peripheral circuits mainly use pecl for digital input and output. of course, pecl and ttl can also be mixed. in this case, disable the ttl outputs with the control registers. * 3 g n d v c c ( + 5 . 0 v ) c o n t r o l r e g i s t e r h o l d 1 0 0 p f 0 . 0 6 8 f 3 . 0 k w 6 8 0 p f l o o p f i l t e r * 4 3 . 0 k w 1 0 0 w v c c g n d 1 0 0 k w 1 0 n f 3 3 0 w g n d i o v c c i o g n d v c o h v c o l v c o h o l d s y n c h s y n c l s y n c s e n a b l e s c l k s d a t a p e c l v c c v b b d s y n c h d s y n c l c l k h c l k l c l k / 2 h c l k / 2 l p e c l v c c i o g n d t t l v c c t t l g n d d s y n c c l k c l k n c l k / 2 c l k / 2 n d g n d d v c c u n l o c k d i v o u t s e r o u t c s t l o a d i o g n d v o c l p p l l v c c p l l g n d v c o v c c v c o g n d v c o h g n d i r e f r c 2 r c 1 i r g n d i r v c c 4 0 3 9 3 8 3 7 4 1 4 2 4 3 4 4 4 5 4 6 4 7 4 8 1 3 1 4 1 5 1 6 1 7 1 8 1 9 2 0 2 1 2 2 2 3 2 4 3 6 3 5 3 4 3 1 3 2 3 3 2 5 2 6 2 7 2 8 2 9 3 0 2 3 4 5 6 7 8 9 1 0 1 1 1 2 1 n o t e s ) * 1 u n l e s s o t h e r w i s e s p e c i f i e d , a l l c a p a c i t o r s a r e 0 . 1 f . * 2 v a r y t h e e x t e r n a l r e s i s t o r a n d c a p a c i t o r v a l u e s o f t h e u n l o c k o u t p u t a s n e c e s s a r y . * 3 t h i s e x t e r n a l r e s i s t o r ( 3 . 0 k w ) s h o u l d b e a m e t a l f i l m r e s i s t o r i n c o n s i d e r a t i o n o f t e m p e r a t u r e c h a r a c t e r i s t i c s . * 4 t h e l o o p f i l t e r ' s c a p a c i t o r s a n d r e s i s t o r s h o u l d a l s o b e t e m p e r a t u r e c o m p e n s a t e d . s y n c h , s y n c l : p e c l l e v e l c o m p l e m e n t a r y i n p u t u n l o c k o u t p u t * 2 p e c l l e v e l o u t p u t p i n s
? 43 CXA3266Q (2) recommended ttl i/o circuit the peripheral circuits mainly use ttl for digital input and output. of course, pecl and ttl can also be mixed. * 3 g n d v c c ( + 5 . 0 v ) c o n t r o l r e g i s t e r h o l d 1 0 0 p f 0 . 0 6 8 f 3 . 0 k w 6 8 0 p f l o o p f i l t e r * 4 3 . 0 k w 1 0 0 w v c c g n d 1 0 0 k w 1 0 n f i o v c c i o g n d v c o h v c o l v c o h o l d s y n c h s y n c l s y n c s e n a b l e s c l k s d a t a p e c l v c c v b b d s y n c h d s y n c l c l k h c l k l c l k / 2 h c l k / 2 l p e c l v c c i o g n d t t l v c c t t l g n d d s y n c c l k c l k n c l k / 2 c l k / 2 n d g n d d v c c u n l o c k d i v o u t s e r o u t c s t l o a d i o g n d v o c l p p l l v c c p l l g n d v c o v c c v c o g n d v c o h g n d i r e f r c 2 r c 1 i r g n d i r v c c 4 0 3 9 3 8 3 7 4 1 4 2 4 3 4 4 4 5 4 6 4 7 4 8 1 3 1 4 1 5 1 6 1 7 1 8 1 9 2 0 2 1 2 2 2 3 2 4 3 6 3 5 3 4 3 1 3 2 3 3 2 5 2 6 2 7 2 8 2 9 3 0 2 3 4 5 6 7 8 9 1 0 1 1 1 2 1 u n l o c k o u t p u t * 2 t t l l e v e l o u t p u t p i n s s y n c : t t l l e v e l i n p u t n o t e s ) * 1 u n l e s s o t h e r w i s e s p e c i f i e d , a l l c a p a c i t o r s a r e 0 . 1 f . * 2 v a r y t h e e x t e r n a l r e s i s t o r a n d c a p a c i t o r v a l u e s o f t h e u n l o c k o u t p u t a s n e c e s s a r y . * 3 t h i s e x t e r n a l r e s i s t o r ( 3 . 0 k w ) s h o u l d b e a m e t a l f i l m r e s i s t o r i n c o n s i d e r a t i o n o f t e m p e r a t u r e c h a r a c t e r i s t i c s . * 4 t h e l o o p f i l t e r ' s c a p a c i t o r s a n d r e s i s t o r s h o u l d a l s o b e t e m p e r a t u r e c o m p e n s a t e d .
? 44 CXA3266Q connecting the CXA3266Q with sony adc (demultiplex mode) when connecting the pll output to a/d converters with built-in demultiplex function such as the cxa3246q/cxa3276q/cxa3256r/cxa3286r (sony), a simple system can be configured by connecting the clk (pecl) and clkn (pecl) outputs of the CXA3266Q to the clk (pecl) and clkn (pecl) inputs of each a/d converter, respectively, and the 1/2 clk (pecl) and 1/2 clkn (pecl) outputs of the CXA3266Q to the resetn (pecl) and reset (pecl) inputs of each a/d converter, respectively (when the pll counter value n is an even number). wiring diagram 8 t t l 8 t t l v i n c l k ( p e c l ) c l k n ( p e c l ) r e s e t n ( p e c l ) r e s e t ( p e c l ) a d c c x a 3 2 4 6 q c x a 3 2 7 6 q c x a 3 2 5 6 r c x a 3 2 8 6 r 8 t t l 8 t t l v i n c l k ( p e c l ) c l k n ( p e c l ) r e s e t n ( p e c l ) r e s e t ( p e c l ) a d c c x a 3 2 4 6 q c x a 3 2 7 6 q c x a 3 2 5 6 r c x a 3 2 8 6 r 8 t t l 8 t t l v i n c l k ( p e c l ) c l k n ( p e c l ) r e s e t n ( p e c l ) r e s e t ( p e c l ) a d c c x a 3 2 4 6 q c x a 3 2 7 6 q c x a 3 2 5 6 r c x a 3 2 8 6 r c m o s l o g i c c l k ( t t l ) r e s e t ( t t l ) d s y n c ( t t l ) 1 / 2 c l k n ( p e c l ) 1 / 2 c l k ( p e c l ) c l k n ( p e c l ) c l k ( p e c l ) p l l c x a 3 2 6 6 q c x a 3 2 4 6 q 8 - b i t 1 2 0 m s p s a d c c x a 3 2 7 6 q 8 - b i t 1 6 0 m s p s a d c c x a 3 2 5 6 r 8 - b i t 1 2 0 m s p s a d c c x a 3 2 8 6 r 8 - b i t 1 6 0 m s p s a d c r g b 1 / 2 c l k ( t t l )
? 45 CXA3266Q CXA3266Q and sony adc (demultiplex mode) timing: 120mhz specification the CXA3266Q and cxa3246q/cxa3256r timings are shown below. here, the important timings are as follows. (the clock cycle is labeled as t.) for the a/d converters clock input vs. reset input the set-up time is t?.1ns and the hold time is 0.3ns, satisfying the a/d converter specifications. for the cmos logic at the rear end of the a/d converters a/d converter data output vs. 1/2 clock output timing the set-up time is t?.5ns and the hold time is t?.5ns. (these timings also include combinations of three a/d converters from different lots, and are defined for all operating temperatures and all operating supply voltages. see the cxa3246q/cxa3256r data sheets for a detailed description.) for the cmos logic at the rear end of the a/d converters dsync signal from CXA3266Q vs. a/d converter 1/2 clock output the set-up time is t?.2ns and the hold time is t?.2ns. c l k ( p e c l ) o u t t 2 . 8 t o 6 . 2 n s 0 . 3 t o 1 . 1 n s 3 . 0 t o 7 . 0 n s t h o l d m i n . t 4 . 2 n s t s e t u p m i n . t 3 . 2 n s t s e t u p m i n . t 4 . 5 n s t h o l d m i n . t 3 . 5 n s d s y n c ( t t l ) o u t 1 / 2 c l k ( p e c l ) o u t 1 / 2 c l k ( t t l ) o u t d a t a ( t t l ) o u t c x a 3 2 4 6 q c x a 3 2 5 6 r c x a 3 2 6 6 q * s e e t h e c x a 3 2 4 6 q a n d c x a 3 2 5 6 r d a t a s h e e t s .
? 46 CXA3266Q CXA3266Q and sony adc (demultiplex mode) timing: 160mhz specification the CXA3266Q and cxa3276q/cxa3286r timings are shown below. here, the important timings are as follows. (the clock cycle is labeled as t.) for the a/d converters clock input vs. reset input the set-up time is t?.1ns and the hold time is 0.3ns, satisfying the a/d converter specifications. for the cmos logic at the rear end of the a/d converters a/d converter data output vs. 1/2 clock output timing the set-up time is t?.0ns and the hold time is t?.0ns. (these timings also include combinations of three a/d converters from different lots, and are defined for all operating temperatures and all operating supply voltages. see the cxa3276q/cxa3286r data sheets for a detailed description.) for the cmos logic at the rear end of the a/d converters dsync signal from CXA3266Q vs. 1/2 clock output of a/d converter the set-up time is t?.2ns and the hold time is t?.7ns. c l k ( p e c l ) o u t t 2 . 8 t o 6 . 2 n s 0 . 3 t o 1 . 1 n s 3 . 0 t o 6 . 5 n s t h o l d m i n . t 3 . 7 n s t s e t u p m i n . t 3 . 2 n s t s e t u p m i n . t 4 . 0 n s t h o l d m i n . t 3 . 0 n s d s y n c ( t t l ) o u t 1 / 2 c l k ( p e c l ) o u t 1 / 2 c l k ( t t l ) o u t d a t a ( t t l ) o u t c x a 3 2 7 6 q c x a 3 2 8 6 r c x a 3 2 6 6 q * s e e t h e c x a 3 2 7 6 q a n d c x a 3 2 8 6 r d a t a s h e e t s .
? 47 CXA3266Q connecting the CXA3266Q with sony adc (straight mode) when connecting the pll output to a/d converters such as the cxa3246q/cxa3276q/cxa3256r/cxa3286r (sony), a simple system can be configured as shown below. wiring diagram 8 t t l v i n c l k ( p e c l ) c l k n ( p e c l ) a d c c x a 3 2 4 6 q c x a 3 2 7 6 q c x a 3 2 5 6 r c x a 3 2 8 6 r 8 t t l v i n c l k ( p e c l ) c l k n ( p e c l ) a d c c x a 3 2 4 6 q c x a 3 2 7 6 q c x a 3 2 5 6 r c x a 3 2 8 6 r 8 t t l v i n c l k ( p e c l ) c l k n ( p e c l ) a d c c x a 3 2 4 6 q c x a 3 2 7 6 q c x a 3 2 5 6 r c x a 3 2 8 6 r c m o s l o g i c c l k ( t t l ) r e s e t ( t t l ) d s y n c ( t t l ) c l k ( t t l ) c l k n ( p e c l ) c l k ( p e c l ) p l l c x a 3 2 6 6 q c x a 3 2 4 6 q 8 - b i t 1 2 0 m s p s a d c c x a 3 2 7 6 q 8 - b i t 1 6 0 m s p s a d c c x a 3 2 5 6 r 8 - b i t 1 2 0 m s p s a d c c x a 3 2 8 6 r 8 - b i t 1 6 0 m s p s a d c r g b
? 48 CXA3266Q CXA3266Q and sony adc (straight mode) timing: 100mhz specification the CXA3266Q and cxa3246q/cxa3256r timings are shown below. here, the important timings are as follows. (the clock cycle is labeled as t.) for the cmos logic at the rear end of the a/d converters a/d converter data output vs. clock output from CXA3266Q the set-up time is t?.7ns and the hold time is 0.3ns. (these timings also include combinations of three a/d converters from different lots, and are defined for all operating temperatures and all operating supply voltages. see the cxa3246q/cxa3256r data sheets for a detailed description.) for the cmos logic at the rear end of the a/d converters dsync signal from CXA3266Q vs. a/d converter clock output the set-up time is t?.0ns and the hold time is t?.0ns. c l k ( p e c l ) o u t t 1 . 8 t o 3 . 2 n s 1 . 0 t o 3 . 0 n s 3 . 5 n s m i n . t h o l d m i n . 0 . 3 n s c l k ( t t l ) o u t d s y n c ( t t l ) o u t d a t a ( t t l ) o u t c x a 3 2 4 6 q c x a 3 2 5 6 r c x a 3 2 6 6 q t s e t u p m i n . t 5 . 7 n s t s e t u p m i n . t 3 . 0 n s t h o l d m i n . 1 . 0 n s 7 . 5 n s m a x .
? 49 CXA3266Q CXA3266Q and sony adc (straight mode) timing: 100mhz specification the CXA3266Q and cxa3276q/cxa3286r timings are shown below. here, the important timings are as follows. (the clock cycle is labeled as t.) for the cmos logic at the rear end of the a/d converters a/d converter data output vs. clock output from CXA3266Q the set-up time is t?.2ns and the hold time is 0.3ns. (these timings also include combinations of three a/d converters from different lots, and are defined for all operating temperatures and all operating supply voltages. see the cxa3276q/cxa3286r data sheets for a detailed description.) for the cmos logic at the rear end of the a/d converters dsync signal from CXA3266Q vs. a/d converter clock output the set-up time is t?.0ns and the hold time is t?.0ns. c l k ( p e c l ) o u t t 1 . 8 t o 3 . 2 n s 1 . 0 t o 3 . 0 n s 3 . 5 n s m i n . t h o l d m i n . 0 . 3 n s c l k ( t t l ) o u t d s y n c ( t t l ) o u t d a t a ( t t l ) o u t c x a 3 2 7 6 q c x a 3 2 8 6 r c x a 3 2 6 6 q t s e t u p m i n . t 5 . 2 n s t s e t u p m i n . t 3 . 0 n s t h o l d m i n . 1 . 0 n s 7 . 0 n s m a x .
? 50 CXA3266Q CXA3266Q-pwb (CXA3266Q evaluation board) the CXA3266Q-pwb is an evaluation board for the CXA3266Q pll-ic. this board makes it possible to easily evaluate the CXA3266Q's performance using the supplied control program (note: ibm pc/at, ms-dos 5.0 or newer us mode specifications). features two input level (ttl and pecl) sync input two output level (ttl and pecl) clk, clk2 and dsync output supply voltage: +5.0v absolute maximum ratings (ta = 25 c) supply voltage v cc ?.5 to +7.0 v recommended operating conditions supply voltage v cc 4.75 to 5.25 v gnd 0 v digital input (pecl) din (high) v cc ?1.1 v (min.) din (low) v cc ?1.5 v (max.) (ttl) din (high) gnd + 2.0 v (min.) din (low) gnd + 0.8 v (max.) operating ambient temperature ta ?0 to +75 c block diagram v c o i n p u t ( p e c l / t t l ) c x a 3 2 6 6 q 4 8 p i n q f p 3 l o o p f i l t e r s y n c i n p u t ( p e c l / t t l ) c o n t r o l b u s ( t t l ) s e n a b l e , s c l k , s d a t a d s y n c o u t p u t ( p e c l / t t l ) c l k o u t p u t ( p e c l / t t l ) c l k / 2 o u t p u t ( p e c l / t t l ) v b b ( p e c l ) s e r o u t ( t t l ) d i v o u t ( t t l ) u n l o c k ( t t l )
? 51 CXA3266Q setting methods and notes on operation input pins this pwb supports ttl single and pecl complementary input. input pins: sync: ttl level input, 10 to 120khz syncl: pecl low level input, 10 to 120khz synch: pecl high level input, 10 to 120khz vco: ttl level input. this is a test pin and is therefore normally not used. vcol: pecl low level input. this is a test pin and is therefore normally not used. vcoh: pecl high level input. this is a test pin and is therefore normally not used. output pins this pwb supports ttl single and pecl complementary output. dsynch, dsyncl: pecl level complementary delay sync outputs. the output range is 10 to 120khz. dsync: ttl level delay sync output. the output range is 10 to 120khz. clkh, clkl: pecl level complementary clk outputs. the output range is 10 to 203mhz. clk, clkn: ttl level complementary clk outputs. the output range is 10 to 100mhz. clk/2h, clk/2l: pecl level complementary 1/2 clk outputs. the output range is 5 to 100mhz. clk/2, clk/2n: ttl level complementary clk outputs. the output range is 5 to 100mhz. vbb: outputs the pecl amplitude threshold voltage. serout: ttl level control register serial data output. divout: ttl level internal programmable counter test output. unlock: ttl level unlock output. this pin requires external circuits such as appropriate capacitors and resistors. see the ic specifications for a detailed description. pecl outputs (vbb, dsynch, dsyncl, clkh, clkl, clk/2h, clk/2l) are output constantly, but ttl outputs (dsync, clk, clkn, clk/2, clk/2n, serout, divout, unlock) are controlled by the respective control registers. therefore, the enable/disable settings should be made in accordance with the application. see the following pages for the setting method.
? 52 CXA3266Q jumper wire settings s1, s2: these enable/disable hold (pin 6). hold is active high, so the jumper wire should be connected to s2 (hold = low) for normal use. when using hold, connect the jumper wire to s1 (hold = high). (for the initial setting, the jumper wire is connected to s2.) s3, s4: these enable/disable tload (pin 13). connect the jumper wire to s4 (tload = high) for normal use. when using tload, connect the jumper wire to s3 (tload = low). (for the initial setting, the jumper wire is connected to s4.) s5, s6: these enable/disable cs (pin 14). connect the jumper wire to s6 (cs = high) for normal use. when using power save, connect the jumper wire to s5 (cs = low). (for the initial setting, the jumper wire is connected to s6.) supplied program this pwb has a control program that facilitates evaluation of the CXA3266Q. operation methods and precautions are as follows. 1) compatible personal computers use an ibm pc/at or compatible machine equipped with a 25-pin d-sub parallel port (printer port). also, operating systems which support the program are ms-dos 5.0 or newer and ms-windows 3.1 or newer. (when using windows, start the program from the dos window.) 2) connection of the supplied cable connect the supplied cable to the parallel port of the personal computer and the dbus1 connector of the CXA3266Q-pwb. 1 1 3 1 4 2 5 d - s u b 2 5 - p i n p a r a l l e l c o n n e c t o r p i n a r r a n g e m e n t p i n 2 : s c l k p i n 3 : s d a t a p i n 4 : s e n a b l e p i n 1 1 : s e r i n p i n 1 9 : g n d 3) connect the power cable and supply power to the CXA3266Q-pwb. 4) start the program a) boot the personal computer and then shift to the directory containing the program. b) set ms-dos to us mode. ? us return or enter c) input the program name. ? CXA3266Q return or enter ? move to the program screen.
? 53 CXA3266Q 5) description of program screen a) setting of each function when the program is started, the following initial screen is displayed. a3266 pll registers divisor 1672 divider 2 coarse delay 00 fine delay 0 charge pump 00 polarity power sync dsync pd scan synth vco bypass 0 0 0 on on on o/p enable divout unlock dsync clk2 nclk2 clk1 nclk1 on on on on on on on dsync functions delay width hold bypass on 00 on on use arrow keys to select data bit. press enter to toggle and load data. use pg up and pg dn to increment/decrement divisor and fine delay registers. press a to abort, s to scan registers mixed signal systems aug 1998
? 54 CXA3266Q divisor this is used to input the frequency division ratio of the program counter. the value can be changed as desired from 9 to 4111 by moving the cursor to the position of the number and pressing the return or enter key. (note: the operating range of the CXA3266Q is from 256 to 4096.) the value can also be incremented or decremented by one step by pressing the page up or page down key, respectively. the internal vco has an oscillator frequency of 40 to 203mhz, so the output frequency and divider (vco frequency divider) setting range are as follows. 5 0 1 0 0 1 5 0 1 / 4 1 / 2 1 / 1 o / p f r e q u e n c y [ m h z ] d i v i d e r 2 0 3 1 0 0 1 0 2 0 0 1 / 8 5 2 5 5 0 d i v i d e r = 1 d i v i d e r = 2 d i v i d e r = 4 d i v i d e r = 8 4 0 2 0 divider this sets the vco output frequency division ratio to 1/1, 1/2, 1/4 or 1/8. the frequency division ratio changes repeatedly in the order of 1/1 ? 1/2 ? 1/4 ? 1/8 ? 1/1 each time the cursor is moved to the position of the number and the return or enter key is pressed. coarse delay this is the dsync upper delay time setting. the value can be changed by moving the cursor to the position of the number and pressing the return or enter key. the delay time variable range settings are "00" (2 clk), "01" (3 clk), "10" (4 clk) or "11" (5 clk). fine delay this is the dsync lower delay time setting. the value can be changed by moving the cursor to the position of the number and pressing the return or enter key. the value can also be incremented or decremented by one step by pressing the page up or page down key, respectively. the delay time can be varied from 1/32 clk to 64/32 clk by setting "0" to "63", respectively. charge pump this is the charge pump circuit ki setting. the value can be changed by moving the cursor to the position of the number and pressing the return or enter key. ki can be set to "00" (approximately 100 a), "01" (approximately 200 a), "10" (approximately 400 a) or "11" (approximately 800 a). polarity these are the sync, dsync and pd (phase detector) polarity inversion settings, and should be set as necessary such as when inverting the sync input and dsync output waveforms. the setting value "1" is positive polarity, and "0" is negative polarity. these should normally all be set to "1". (fix pd to "1" other than during test mode.)
? 55 CXA3266Q power scan: this is the control register read setting. when this is on, the control register serial data is output from serout (pin 15). this should normally be set to off. synth: this is the enable/disable setting for this ic. this should normally be set to on. vco by-pass: this is set to off when testing the program counter. this should normally be set to on. o/p enable these are the enable/disable settings for each ttl output (divout, unlock, dsync, clk2, nclk2, clk1 and nclk1). set to on when performing evaluation using ttl output. dsync functions delay: when divout is output from dsync output, its delay is set. 4 clk for off; 5 clk for on. width: when divout is output from dsync output, its pulse width is changed. their settings are 1 clk for "00", 2 clk for "01", 4 clk for "10", and 8 clk for "11". hold: dsync output status is set during hold. output off status for off (h or l fixed according to dsync pol polarity); dsync or divout are output for on. bypass: dsync/divout output switching from dsync output is performed. dsync is output for on; divout for off.
? 56 CXA3266Q b) description of readout mode this program has a function (readout mode) that reads the contents written to the control registers from the CXA3266Q serout (pin 15) and displays these contents on the screen. this function is described below. 1) set scan to on at the function setting screen. 2) press the s key. the following screen appears. this screen conforms to the control register table listed in the CXA3266Q data sheet. 3) press the r key to return to the original function setting screen. c) quit the program press the a key to quit the program. scan result, cxa3266 pll registers register 1 divreg1 00111000 register 2 divreg2 0101 register 3 cenfrereg 01 register 4 delayreg 00100000 register 5 cpreg 100110 register 6 ttlpolreg 11111111 register 7 testpowreg 111111 press r to return to pll registers menu. press a to abort mixed signal systems aug 1998
? 57 CXA3266Q substrate pattern (parts surface) substrate pattern (solder surface) a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
? 58 CXA3266Q silk screen (parts surface) silk screen (solder surface) c 1 c 1 4 c 1 8 c 1 7 c 1 3 c 1 5 c 1 6 c 1 0 c 9 c 8 c 1 2 c 1 9 c 2 0 c 1 1 c 7 c 3 c 2 c 4 c 6 c 1 8 c 5 v c o b n c 3 v c o l b n c 2 v c o h b n c 1 v c c s y n c h b n c 4 s y n c l b n c 5 s y n c b n c 6 s 1 s 2 r 1 9 i c 1 s 3 s 4 s 5 s 6 p r 2 s e r o u t p r 3 d i v o u t p r 4 u n l o c k p r 1 1 c l k / 2 n p r 1 2 c l k / 2 p r 1 3 c l k n p r 1 4 c l k p r 1 5 d s y n c p r 1 c l k / 2 l p r 5 c l k / 2 h r 6 r 1 3 r 5 r 1 2 p r 6 c l k l p r 7 c l k h r 7 r 1 4 r 4 r 1 1 p r 8 d s y n c l p r 9 d s y n c h r 3 r 1 0 r 2 r 9 p r 1 0 v b b r 1 r 8 c 2 1 3 3 + c x a 3 2 6 6 q p w b d b u s 1 c o n t r o l r e g i s t e r g n d
? 59 CXA3266Q pwb circuit diagram s 1 s 2 c 2 0 . 1 c 3 0 . 1 c 1 9 0 . 0 6 8 c 2 0 6 8 0 p r 1 8 3 . 0 k g n d r 1 9 3 . 0 k c 1 1 1 0 0 p c 4 0 . 1 c 5 0 . 1 c 6 0 . 1 c 1 2 0 . 1 c 7 0 . 1 s 3 s 4 s 5 s 6 c 9 0 . 1 g n d g n d c 8 0 . 1 c 1 0 0 . 1 v c c r 8 3 3 0 r 1 r 9 3 3 0 r 2 r 1 0 3 3 0 r 3 r 1 1 3 3 0 r 4 r 1 4 3 3 0 r 7 r 1 2 3 3 0 r 5 r 1 3 3 3 0 r 6 v c c p r 1 0 a v b b p r 9 a d s y n c h p r 8 a d s y n c l p r 7 a c l k h p r 6 a c l k l p r 5 a c l k / 2 h p r 1 a c l k / 2 l p r 1 5 a d s y n c p r 1 4 a c l k p r 1 3 a c l k n p r 1 2 a c l k / 2 p r 1 1 a c l k / 2 n c 1 0 . 1 c 1 3 0 . 1 c 1 4 0 . 1 c 1 5 0 . 1 c 1 8 0 . 1 c 1 6 0 . 1 c 1 7 0 . 1 g n d v c c c 2 1 3 3 p w r 1 v c c p w r 2 g n d p r 3 a d i v o u t p r 4 a u n l o c k p r 2 a s e r o u t 1 5 d b u s 1 c o n t r o l r e g i s t e r g n d b n c 6 s y n c b n c 5 s y n c l b n c 4 s y n c h b n c 3 v c o b n c 2 v c o l b n c 1 v c o h i o g n d v o c l p p l l v c c p l l g n d v c o v c c v c o g n d v c o h g n d i r e f r c 2 r c 1 i r g n d i r v c c 4 0 3 9 3 8 3 7 4 1 4 2 4 3 4 4 4 5 4 6 4 7 4 8 d s y n c c l k c l k n c l k / 2 c l k / 2 n d g n d d v c c u n l o c k d i v o u t s e r o u t c s t l o a d 1 3 1 4 1 5 1 6 1 7 1 8 1 9 2 0 2 1 2 2 2 3 2 4 p e c l v c c v b b d s y n c h d s y n c l c l k h c l k l c l k / 2 h c l k / 2 l p e c l v c c i o g n d t t l v c c t t l g n d 3 6 3 5 3 4 3 1 3 2 3 3 2 5 2 6 2 7 2 8 2 9 3 0 i o v c c i o g n d v c o h v c o l v c o h o l d s y n c h s y n c l s y n c s e n a b l e s c l k s d a t a 2 3 4 5 6 7 8 9 1 0 1 1 1 2 1 c x a 3 2 6 6 q n o t e ) r 1 t o r 7 a r e n o t m o u n t e d .
? 60 CXA3266Q package outline unit: mm s o n y c o d e e i a j c o d e j e d e c c o d e m p a c k a g e s t r u c t u r e p a c k a g e m a t e r i a l l e a d t r e a t m e n t l e a d m a t e r i a l p a c k a g e m a s s e p o x y r e s i n s o l d e r / p a l l a d i u m p l a t i n g 4 2 / c o p p e r a l l o y 4 8 p i n q f p ( p l a s t i c ) 1 5 . 3 0 . 4 1 2 . 0 0 . 1 + 0 . 4 0 . 8 0 . 3 0 . 1 + 0 . 1 5 0 . 2 4 1 3 2 4 2 5 3 6 3 7 4 8 1 1 2 2 . 2 0 . 1 5 + 0 . 3 5 0 . 9 0 . 2 0 . 1 0 . 1 + 0 . 2 1 3 . 5 0 . 1 5 0 . 0 5 + 0 . 1 q f p - 4 8 p - l 0 4 q f p 0 4 8 - p - 1 2 1 2 0 . 7 g 0 . 1 5 n o t e : p a l l a d i u m p l a t i n g t h i s p r o d u c t u s e s s - p d p p f ( s o n y s p e c . - p a l l a d i u m p r e - p l a t e d l e a d f r a m e ) .

▲Up To Search▲

Price & Availability of CXA3266Q

	To Download CXA3266Q Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .