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ordering number : enn7779a sanyo semiconductors data sheet sanyo electric co.,ltd. semiconductor company tokyo office tokyo bldg., 1-10, 1 chome, ueno, taito-ku, tokyo, 110-8534 japan 81505ms ot b8-7701 no.7779-1/21 overview the LA7567EV is pal/ntsc multi-format audio vif/sif if ics that adopt a semi-adjustment-free system. the vif block adopts a technique that makes aft adjustment unnecessary by adjusting the vco, thus simplifying the adjustment steps in the manufacturing process. pll detection is adopted in the fm detector to support multi-format audio detection. a built-in sif converter is included to simplify multi-format system designs. a 5v power-supply voltage is used to match that used in most multimedia systems. in addition, these ics also include a buzz canceller to suppress nyquist buzz and provide high audio quality. the LA7567EV feature improvements over the la7567n and la7567nm in the audio and video signal-to-noise ratios and the video signal. functions vif block: vif amplifier, pll detector, bnc, rf agc, eq amplifier, aft, if agc, buzz canceller. first sif block: first sif, first sif detector, agc. sif block: multi-format sif converter, limiter amplifier, pll fm detector. features no aft or sif coils are required, making these circuits adjustment free. a pal/ntsc multi-format audio system can be constructed easily. built-in buzz canceller for excellent audio performance. ? cc = 5v, low power dissipation (250mw) LA7567EV monolithic linear ic tv and vcr vif/sif if signal-processing circuit with pal/ntsc multi-format audio support any and all sanyo products described or contained herein do not have specifications that can handle applications that require extremely high levels of reliability, such as life-support systems, aircraft's control systems, or other applications whose failure can be reasonably expected to result in serious physical and/or material damage. consult with your sanyo representative nearest you before using any sanyo products described or contained herein in such applications. sanyo assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all sanyo products described or contained herein. parameter symbol conditions ratings unit maximum supply voltage v cc max 6v circuit voltage v 13 , v 17 v cc v i 6 ? ma circuit current i 10 ?0 ma i 24 ? ma allowable power dissipation pd max ta 70?, when mounted on a pcb * 400 mw operating temperature t opr ?0 to +70 ? storage temperature t stg ?5 to +150 ? specifications maximum ratings at ta = 25? *: printed circuit board: 114.3mm 76.1mm 1.6mm, glass epoxy board.
parameter symbol conditions ratings unit min typ max [vif block] circuit current i5 40.8 48.0 55.2 ma maximum rf agc voltage v 14h v cc ?0.5 v cc v minimum rf agc voltage v 14l 0 0.5 v input sensitivity v i s1 = off 33 39 45 db? agc range g r 58 63 db maximum allowable input v i max 95 100 db? no-signal video output voltage v 6 3.0 3.3 3.6 v sync. signal tip voltage v 6 tip 1.05 1.35 1.64 v video output level v o 1.46 1.7 1.94 vp-p black noise threshold voltage v bth 0.5 0.8 1.1 v black noise clamp voltage v bcl 1.6 1.9 2.2 v video signal-to-noise ratio s/n 48 52 db c-s beat i c-s 38 43 db frequency characteristics f c 6mhz ?.0 ?.5 db differential gain d g 3.0 6.5 % differential phase d p 3 5 deg no-signal aft voltage v 13 2.0 2.5 3.0 v maximum aft voltage v 13h 4.0 4.4 5.0 v minimum aft voltage v 13l 0 0.18 1.00 v aft detection sensitivity s f 17 24 32 mv/khz vif input resistance r i 38.9mhz 1.5 k ? vif input capacitance c i 38.9mhz 3 pf apc pull-in range (u) f pu 0.7 1.5 mhz apc pull-in range (l) f pl ?.5 ?.9 mhz aft tolerance frequency 1 d fa1 ?50 ?0 350 khz vco1 maximum variability range (u) d fu 1.0 1.5 mhz vco1 maximum variability range (l) d fl ?.5 ?.0 mhz vco control sensitivity b 1.0 2.0 4.0 khz/mv [first sif block] conversion gain v g 22 28 32 db 5.5 imhz output level s o 32 70 110 mvrms first sif maximum input s i max 50 100 mvrms first sif input resistance r i (sif) 33.4mhz 2 k ? first sif input capacitance c i (sif) 33.4mhz 3 pf [sif block] limiting sensitivity v li (lim) 42 48 54 db? fm detector output voltage * v o (fm) 5.5mhz ?0khz 570 710 855 mvrms amr rejection ratio amr 50 60 db total harmonic distortion thd 0.3 0.8 % sif s/n s/n (fm) 57 62 db [sif converter] conversion gain v g (sif) 8 11 14 db maximum output level v max 103 109 115 db? carrier suppression ratio v gr (5.5) 15 21 db oscillator level v osc 35 70 mvp-p oscillator leakage oscleak 14 25 db oscillator stopped current i 4 300 ? no.7779-2/21 LA7567EV parameter symbol conditions ratings unit recommended supply voltage v cc 5v operating supply voltage range v cc op 4.5 to 5.5 v operating conditions at ta = 25? electrical characteristics at ta = 25?, v cc = 5v, fp = 38.9mhz note: * the fm detector output level can be reduced and the fm dynamic range can be increased by inserting a resistor and a capacitor i n series between pin 23 and ground.
no.7779-3/21 LA7567EV --20 0 20 80 40 60 0 100 400 200 300 500 ila07068 100 pd max -- ta allowable power dissipation, pd max - mw ambient temperature, ta - c printed circuit board: 114.3mm 76.1mm 1.6mm glass epoxy board 7.8 5.6 7.6 0.22 0.65 (0.33) 12 13 24 1 0.5 0.15 1.5max 0.1 (1.3) package dimensions unit : mm 3175c sanyo : ssop24 (275mil) pin assignment 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 2nd sif input bias filter mix out cer.osc v cc video out eq filter eq input apc filter video det out vco coil vco coil aft out rf agc out 1st sif input 1st sif agc filter if agc filter vif vif gnd rf agc vr 1st sif out (nicam out) fm filter fm det out ila06680 LA7567EV top view
internal equivalent circuit and external components no.7779-4/21 LA7567EV 100k ? 100k ? 5.6k ? 330 ? 150 ? 500k 3k ? 330 ? 68 ? 10k ? -b 300 ? 1k ? 30pf 620 ? 1k ? 1k ? 400 ? 400 ? 1k ? 30k ? 1k ? 1k ? 1k ? 1k ? 10k ? 2k ? 2k ? 1k ? 100 ? 2k ? 6k ? 500 ? 10k ? 200 ? 9.2k ? 1.2k ? 1.2k ? 1k ? 1k ? 1k ? 2k ? 200 ? 10k ? 3k ? saw (s) 24 23 22 21 20 19 18 17 16 15 14 13 123456789101112 100 f 0.47 f 0.47 to 1 f 0.01 f video out 0.01 f 0.01 f 1 f 0.022 f 0.01 f 0.01 f 0.01 f audio output rfagc vr rf agc output if 9v input gnd bpf aft output v cc v v v 1v 6mhz osc ila06681 saw(p) saw (s) + + + vco coil
ac characteristics test circuit test circuit no.7779-5/21 LA7567EV + + + + 100k ? 100k ? 30k ? 100k ? 1.5k ? 500khz 5.6k ? 330 ? 560 ? 10k ? 68 ? 150 ? 51 ? 10k ? -b 51 ? 51 ? fm det rf agc if agc agc 1st det vco eq amp mix hpf hpf video det hpf aft lim amp vif amp 24 23 22 21 20 19 18 17 16 15 14 13 123456789101112 1st amp 1 f 0.01 f 0.47 f 0.01 f 1 f (m) (d) (a) (e) 0.01 f 0.01 f 0.01 f 0.01 f 0.01 f 0.01 f 0.01 f 0.01 f 1000pf 24pf (m) (f) (b) fmdetout gnd if agc 1stsifin 2ndsifin conv.out video out vifin rf agc 9v out v cc gnd aft out ila06682 rfagc vr 1stsifout (nicamout) s2 s1 + 100k ? 100k ? 10k ? 330 ? 10k ? 24 23 22 21 20 19 18 17 16 15 14 13 123456789101112 100 f 0.01 f 0.01 f 0.01 f 0.01 f 0.01 f 0.01 f 0.01 f 0.01 f 0.01 f 0.01 f 0.01 f 0.01 f v cc ila06683 1st sif in vif in LA7567EV impedance analyzer
test conditions v1. circuit current . . . . . . . . . . . . [i 5 ] (1) internal agc (2) input a 38.9mhz 10mvrms continuous wave to the vif input pin. (3) rf agc vr max (4) connect an ammeter to the v cc and measure the incoming current. v2.v3. maximum rf agc voltage, minimum rf agc voltage . . . . . . [v 14h , v 14l ] (1) internal agc (2) input a 38.9mhz 10mvrms continuous wave to the vif input pin. (3) adjust the rf agc vr (resistor value max.) and measure the maximum rf agc voltage. (f) (4) adjust the rf agc vr (resistor value min.) and measure the minimum rf agc voltage. (f) v4. input sensitivity. . . . . . . . . . . . . . . . . . . . . . . . [v i ] (1) internal agc (2) fp = 38.9mhz 400hz 40% am (vif input) (3) turn off the s1 and put 100k ? through. (4) vif input level at which the 400hz detection output level at test point a becomes 0.64vp-p. v5. agc range . . . . . . . . . . . . . . . . . . . . . . . . . . . . [g r ] (1) apply the v cc voltage to the external agc if agc (pin 17). (2) in the same manner as for the v4 (input sensitivity),measure the vif input level at which the detection output level becomes 0.64vp-p .............vi1. (3) v6. maximum allowable input. . . . . . . . . . . . . . . . [v i max] (1) internal agc (2) fp = 38.9mhz 15khz 78% am (vif input) (3) vif input level at which the detection output level at test point a is video output (vo) 1db v7. no-signal video output voltage . . . . . . . . . . . [v 6 ] (1) apply the v cc voltage to the external agc, if agc (pin 17). (2) measure the dc voltage of video output (a). v8. sync. signal tip voltage . . . . . . . . . . . . . . . . . [v 6tip ] (1) internal agc (2) input a 38.9mhz 10mvrms continuous wave to the vif input pin. (3) measure the dc voltage of video output (a). v9. video output level . . . . . . . . . . . . . . . . . . . . . . [v o ] (1) internal agc (2) fp = 38.9mhz 15khz 78% am vi = 10mvrms (vif input) (3) measure the peak value of the detection output level at test point a. . . . . . . . vp-p no.7779-6/21 LA7567EV db vi vi1 20log g r =
v10.v11. black noise threshold level and clamp voltage . . . . . . [v bth , v bcl ] (1) apply dc voltage to the external agc, if agc (pin 17) and adjust the voltage. (2) fp = 38.9mhz 400hz 40% am10mvrms (vif input) (3) adjust the if agc (pin 17) voltage to operate the noise canceller. measure the v bth , v bcl at test point a. v12. video s/n . . . . . . . . . . . . . . . . . . . . . . . . . . . . [s/n] (1) internal agc (2) fp = 38.9mhz cw = 10mvrms (vif input) (3) measure the noise voltage at test point a in rms volts through a 10khz to 4mhz band-pass filter. noise voltage (n) (4) v13. c/s beat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [i cs ] (1) apply dc voltage to the external agc if agc (pin 17) and adjust the voltage. (2) fp = 38.9mhz cw;10mvrms fc = 34.47mhz cw;10mvrms-10db fs = 33.4mhz cw;10mvrms-10db (3) adjust the if agc (pin 17) voltage so that the output level at test point a becomes 1.3vp-p. (4) measure the difference between the levels at 4.43mhz and 1.07mhz. v14. frequency characteristics . . . . . . . . . . . . . . [f c ] (1) apply dc voltage to the external agc if agc (pin 17) and adjust the voltage. (2) sg1: 38.9mhz continuous wave 10mvrms sg2: 38.8mhz to 32.9mhz continuous wave 2mvrms add the sg1 and sg2 signals using a t pat and adjust each sg signal level so that the above-mentioned levels are reached and input the added signals to the vif in. (3) first set the sg2 frequency to 38.8mhz, and then adjust the if agc voltage (v17) so that the output level at test point a becomes 0.5vp-p.........v1 (4) set the sg2 frequency to 32.9mhz and measure the output level..........v2 (5) calculate as follows: no.7779-7/21 LA7567EV v bcl v bth time video output (v) s/n = 20 log = 20 log (db) noise voltage (vrms) video portion (vp-p) noise voltage (vrms) 1.12vp-p 1.07mhz 4.43m 5.5m frequency(mhz) output (db) c/s beat (db) v1 v2 20log f c =
v15.v16. differential gain, differential phase . . . [d g , d p ] (1) internal agc (2) fp = 38.9mhz alp50% 87.5% modulation video signal vi = 10mvrms (3) measure the dg and dp at test point a v17. no signal aft voltage . . . . . . . . . . . . . . . . . [v 13 ] (1) internal agc (2) measure the dc voltage at the aft output (b). v18.v19.v20. maximum minimum aft output voltage, aft detection sensitivity . . . . [v 13h , v 13l , s f ] (1) internal agc (2) fp = 38.9mhz 1.5mhz sweep = 10mvrms (vif input) (3) maximum voltage: v 13h , minimum voltage: v 13l (4) measure the frequency deviation at which the voltage at test point b changes from v1 to v2. .......... ? f v21.v22. vif input resistance, input capacitance . . . . . . . . . . [r i , c i ] (1) referring to the input impedance test circuit, measure r i and c i with an impedance analyzer. v23.v24. apc pull-in range. . . . . . . . . . . . . . . . . . [f pu , f pl ] (1) internal agc (2) fp = 33mhz to 44mhz continuous wave; 10mvrms (3) adjust the sg signal frequency to be higher than fp = 38.9mhz to bring the pll to unlocked state. note: gthe pll is assumed to be in unlocked state when a beat signal appears at test point a. (4) when the sg signal frequency is lowered, the pll is brought to locked state again. ...........(f1) (5) lower the sg signal frequency to bring the pll to unlocked state. (6) when the sg signal frequency is raised, the pll is brought to locked state again. ...........(f2) (7) calculate as follows: fpu = f1 - 38.9mhz fpl = f2 - 38.9mhz v25. aft tolerance frequency . . . . . . . . . . . . . . . [ ? fa1] (1) internal agc (2) sg1:37.9mhz to 40.9mhz variable continuous wave 10mvrmns (3) adjust the sg1 signal frequency so that the aft output dc voltage (test point b) becomes 2.5v; that sg1 signal frequency is f1. (4) external agc (adjust the v17.) (5) apply 5v to the ifagc (pin 17) and then pick up the vco oscillation frequency from gnd, etc. and measure the frequency (f2) (6) calculate as follows: aft tolerance frequency ? fa1 = f2 - f1(khz) no.7779-8/21 LA7567EV mv/khz ? f ( khz ) 2000( mv ) s f = v13h v13l v1 ; 3.5v v2 ; 1.5v if frequency (mhz) aft output (v) ? f
v26.v27. vco maximum variable range (u, l) . . [d fu , d fl ] (1) apply the v cc voltage to the external agc, if agc (pin 17). (2) pick up the vco oscillation frequency from the video output (a), gnd, etc. and adjust the vco coil so coil that the frequency becomes 38.9mhz. (3) fl is taken as the frequency when 1v is applied to the apc pin (pin 9). in the same manner, fu is taken as the frequency when 5v is applied to the apc pin (pin 9). d fu = fu - 38.9mhz d fl = fl - 38.9mhz v28. vco control sensitivity. . . . . . . . . . . . . . . . . [ ] (1) apply the v cc voltage to the external agc, if agc (pin 17). (2) pick up the vco oscillation frequency from the video output (a), gnd, etc. and adjust the vco coil so that the frequency becomes 38.9mhz. (3) f1 is taken as the frequency when 3.0v applied to the apc pin (pin 9). in the same manner, f2 is taken as the frequency when 3.4v is applied to the apc pin (pin 9). f1. first sif conversion gain . . . . . . . . . . . . . . . . [v g ] (1) internal agc (2) fp = 38.9mhz cw; 10mv (vif input) fs = 33.4mhz cw; 500 v (first sif input) . . . . v1 (3) detection output level at test point c (vrms) . . . . v2 (5.5mhz) (4) f2. 5.5mhz output level. . . . . . . . . . . . . . . . . . . . . [s o ] (1) internal agc (2) fp = 38.9mhz cw; 10mv (vif input) fs = 33.4mhz cw; 10mv (first sif input) . . . . . . . . . . . . . . . . . v1 (3) detection output level at test point c (5.5mhz) . . . . . . . . . . . . . . s o (mvrms) f3. 1st sif maximum input . . . . . . . . . . . . . . . . . . [s i max] (1) internal agc (2) fp = 38.9mhz cw; 10mv (vif input) fs = 33.4mhz cw; variable (first sif input) (3) input level at which the detection output at test point c (5.5mhz) becomes so 2db......s i max f4. f5. first sif input resistance, input capacitance . . . . [r i (sif1), c i (sif1)] (1) using an input analyzer, measure ri and ci in the input impedance measuring circuit. no.7779-9/21 LA7567EV ( ) mv khz 400 f1 f2 = db v1 v2 20log v g =
s1. sif limiting sensitivity . . . . . . . . . . . . . . . . . . [v li (lim)] (1) apply the v cc voltage to the external agc, if agc (pin 17). (2) fs = 5.5mhz fm = 400hz ? f = 30khz (sif input) (3) set the sif input level to 100mvrms and then measure the level at test point d.......v1 (4) lower the sif input level until v1-3db occurs. measure the input level at that moment. s2?. s7?0. fm detection output voltage, distortion factor . . . . . . [v o (fm, thd] (1) apply the v cc voltage to the external agc, if agc (pin 17). (2) fs = 4.5mhz fm = 1khz ? f = 25khz, fs = 5.5mhz or 6.0mhz fm = 1khz ? f = 50khz, (sif input vi = 100mvrms) (3) assign the level at test point d to the fm detection output voltage and measure the distortion factor. s3. am rejection ratio . . . . . . . . . . . . . . . . . . . . . . [amr] (1) apply the v cc voltage to the external agc, if agc (pin 17). (2) fs = 5.5mhz fm = 400hz am = 30% (sif input vi=100mvrms) (3) measure the output level at test point d............vam (4) s5. sif s/n . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [s/n] (1) external agc (v17 = v cc ) (2) fs = 5.5mhz no mod vi = 100mvrms (3) measure the output level at test point d...........vn (4) c1. converter conversion gain . . . . . . . . . . . . . . v g (sif) (1) internal agc (2) fp = 38.9mhz cw; 10mv (vif input) fs = 33.4mhz cw; 316 v (first sif input) (3) measure the 6mhz component at test point e (mix output). ...................v1 (4) measure the 5.5mhz component at test point f (nicam output). ...........v2 (5) c2. sif converter maximum output level . . . . . . [v max ] (1) internal agc (2) fp = 38.9mhz cw; 10mv (vif input) fs = 33.4mhz cw; 10mv (first sif input) (3) measure the 6mhz component at test point e (mix output). .........v max (db v) c3. carrier suppression ratio (v gr (5.5)) (1) internal agc (2) fp = 38.9mhz cw; 10mv (vif input) fs = 33.4mhz cw; 316 v (first sif input) (3) measure the 6mhz component at test point e (mix output). .........v6 (db v) (4) measure the 5.5mhz component at test point e (mix output). ......v5.5 (db v) (5) perform the following calculation. carrier suppression ratio v gr (5.5)(db) = v6 - v5.5 no.7779-10/21 LA7567EV db vam vo(det) 20log amr = db vn vo(det) 20log s/n = db v2 v1 20log v g mix =
c5. osc leakage (osc leak ) (1) internal agc (2) fp = 38.9mhz cw; 10mv(vif input) fs = 33.4mhz cw; 316 v(first sif input) (3) measure the 6mhz component at test point e (mix output). ..........v6(db v) (4) measure the 500khz component at test point e (mix output). .......v0.5(db v) (5) perform the following calculation. carrier suppression ratio osc leak (db)=v6 - v0.5 note 1) unless otherwise specified for vif test, apply the v cc voltage to the if agc and adjust the vco coil so that oscillation occurs at 38.9mhz. note 2) unless otherwise specified, the sw1 must be on. no.7779-11/21 LA7567EV
no.7779-12/21 LA7567EV application circuit diagrams pal split nt (us) split 100k ? 4 + + + 2.2k ? 100k ? 30k ? 5.1k ? 330 ? 560 ? 150 ? 330 ? 68 ? 10k ? -b fm det saw ( s ) rf agc if agc agc 1st det vco eq amp mix hpf hpf video det saw ( p ) hpf aft lim amp vif amp 24 23 22 21 20 19 18 17 16 15 14 13 1 2 3 5 6 7 8 9 10 11 12 1st amp 100 f 0.01 f 15 h 0.47 f 0.01 f 1 f ( m ) 0.022 f 0.01 f 0.01 f 1000pf ( m ) af out gnd tsf5315 in put rf agc 9v out gnd video out bpf aft out v cc ila06684 + + 2.2k ? 100k ? 100k ? 1k ? 7.5k ? 330 ? 560 ? 10k ? 150 ? 330 ? 10k ? -b fm det saw ( s ) rf agc if agc agc 1st det vco eq amp mix hpf hpf video det saw ( p ) hpf aft lim amp vif amp 24 23 22 21 20 19 18 17 16 15 14 13 123456789101112 1st amp 100 f 1 f 0.01 f 15 h 0.47 f 0.01 f ( m ) 0.022 f 1 h 0.01 f 0.01 f 1000pf ( m ) af out gnd tsf1241 rf agc out gnd video out bpf aft out v cc ila06685 + 1 f 30k ? 9v in put
no.7779-13/21 LA7567EV japan split + + + 1 f 2.2k ? 100k ? 100k ? 1k ? 7.5k ? 330 ? 560 ? 10k ? 150 ? 330 ? 10k ? -b fm det saw ( s ) rf agc if agc agc 1st det vco eq amp mix hpf hpf video det saw ( p ) hpf aft lim amp vif amp 24 23 22 21 20 19 18 17 16 15 14 13 123456789101112 1st amp 100 f 1 f 0.01 f 15 h 0.47 f 0.01 f ( m ) 0.022 f 0.01 f 0.01 f 1000pf ( m ) af out gnd tsf1137 rf agc out gnd video out bpf aft out v cc ila06686 30k ? 9v in put nt (us) inter + + gnd + 1 f 2.2k ? 100k ? 100k ? 7.5k ? 330 ? 560 ? 100k ? 150 ? 330 ? 10k ? -b fm det rf agc if agc agc 1st det vco eq amp mix hpf hpf video det saw ( p ) hpf aft lim amp vif amp 24 23 22 21 20 19 18 17 16 15 14 13 123456789101112 1st amp 100 f 1 f 0.01 f 15 h 0.47 f 0.01 f 22 h ( m ) 0.022 f 0.01 f 1000pf 62pf ( m ) af out tsf5220 in put rf agc out v cc gnd video out bpf aft out * inter 16pin gnd ila06687 30k ? 9v
sample application circuit when the sif, first sif, aft, and rf agc circuits are not used: when the sif circuit is not used: leave pins 1, 23, and 24 open. connect pin 2 to ground through a 2k ? resistor. when the first sif circuit is not used: leave pins 3, 4, 15 and 22 open. connect pin 16 to ground. when the aft circuit is not used: since there is no way to defeat the aft circuit, connect a 100k ? resistor and a 0.01? capacitor in parallel between pin 13 and ground. when the rf agc circuit is not used: leave pins 14 and 21 open. insert a 0.01? capacitor between pin 21 and ground for oscillation prevention. no.7779-14/21 LA7567EV 2.2k ? 100k ? 1k ? 330 ? 560 ? 2k ? 150 ? fm det saw ( s ) rf agc if agc agc 1st det vco eq amp mix hpf hpf video det saw ( p ) hpf aft lim amp vif amp 24 23 22 21 20 19 18 17 16 15 14 13 123456789101112 1st amp + 100 f 0.01 f 15 h 0.47 f ( m ) gnd tsf5315 gnd video out aft out v cc ila06688 in put
no.7779-15/21 LA7567EV pin functions pin no. pin description equivalent circuit 1 sif input sif input. the input impedance is about 1k ? . since buzzing and buzz beating can occur if interference enters this input pin, care must be taken when design the pattern layout for this pin. note that the video and chrominance signals are especially likely to interfere with the audio signal. also, the vif carrier signal can also cause interference. 1 1k ? 1k ? ila06689 2 fm power supply filter fm detector bias line filter input. used to improve the fm detector signal-to-noise ratio. c1 should be at least 0.47?, and 1? is recommended. if the fm detector is not used, connect pin 2 to ground through a 2k ? resistor. this stops the fm detector vco. 2 ila06690 c 1 to vco bias 4.2v 24k ? 4k ? 14k ? 3 4 sif converter pin 3 is the sif converter output. the signal is passed through a 6mhz bandpass filter and input to the sif circuit. there is a 200 ? resistor in series with the emitter-follower output. pin 4 is the sif converter 500khz oscillator connection. since this oscillator circuit includes an alc, the oscillator level is held fixed at a low level. if this circuit is not used, connect pin 4 to ground through a 10k ? external resistor. providing this external resistor stops the 500khz oscillator and allows the converter to be used as an amplifier. when this circuit is used with an intercarrier, the buzz characteristics can be improved by changing the value of the resistor connected between pin 4and ground to 100k ? . 3 ila06713 200 ? 5 v cc use the shortest distance possible when decoupling v cc and ground. continued on next page. 4 ila06691 68 ? 500khz 400 ? 4(r)
no.7779-16/21 LA7567EV continued from preceding page. pin no. pin description equivalent circuit 6 7 8 eq amp equalizer circuit. this circuit is used to correct the video signal frequency characteristics. pin 8 is the eq amplifier input. this amplifier amplifies a 1.5vp-p video signal to 2vp-p. notes on equalizer amplifier design the equalizer amplifier is designed as a voltage follower amplifier with a gain of about 2.3db. when used for frequency characteristics correction, a capacitor, inductor, and resistor must be connected in series between pin 7 and ground. approach used in the equalizer amplifier if vi is the input signal and vo is the output signal, then: where g is the voltage-follower amplifier gain. assume: vin: imaginary short g: about 2.3db vin 0. then: r1 is the ic internal resistance, and is 1k ? . in the application design, simply select z to correspond to the desired characteristics. however, since the eq amplifier gain will be maximum at the resonant point defined by z, care is required to assure that distortion does not occur. 6 7 2k ? eq output 9.2k ? c r l =z 1k ? ila06692 9 apc filter pll detector apc filter connection. the apc time constant is switched internally in the ic. when locked, the vco is controlled by loop a and the loop gain is reduced. when unlocked and during weak field reception, the vco is controlled by loop b and the loop gain is increased. for this apc filter we recommend: r = 150 to 390 ? c = 0.47? 9 1k ? 1k ? 1k ? a b from ila06694 c + r apc det r1 +1 (vi + vin) = vo g 2 vog r1 av = = +1 vi z continued on next page. 8 200 ? eq input agc ila06693
no.7779-17/21 LA7567EV continued from preceding page. pin no. pin description equivalent circuit 10 composite video output output for the video signal that includes the sif carrier. a resistor must be inserted between pin 10 and ground to acquire adequate drive capability. r 300 ? 10 2k ? 15pf 2pf ila06695 11 12 vco tank vco tank circuit used for video signal detection. see the coil specifications provided separately for details on the tank circuit. this vco is a vector synthesis vco. 11 12 ila06696 13 aft output aft output. the aft center voltage is generated by an external bleeder resistor. the aft gain is increased by increasing the resistance of this external bleeder resistor. however, this resistor must not exceed 390k ? . this circuit includes a control function that controls the aft voltage to naturally approach the center voltage during weak field reception. 13 ila06697 14 rf agc output rf agc output. this output controls the tuner rf agc. a protective 100 ? resistor is inserted in series with the open collector output. determine the external bleeder resistor value in accordance with the specifications of the tuner. 14 100 ? to tuner 9v ila06698 15 1st sif input first sif input. a dc cut capacitor must be used in the input circuit. if a saw filter is used: the first sif sensitivity can be increased by inserting an inductor between the saw filter and the ic to neutralize the saw filter output capacitance and the ic input capacitance. when used in an intercarrier system: this pin (pin 15) may be left open. 2k ? 2k ? ila06699 15 continued on next page.
no.7779-18/21 LA7567EV continued from preceding page. pin no. pin description equivalent circuit 16 1st sif agc filter first sif agc filter connection. this ic adopts an average value agc technique. the first sif conversion gain is about 30db, and the agc range is over 50db. a 0.01? capacitor is normally used in filter connected to this pin. when used in an intercarrier system: connect this pin (pin 16) to ground. the ic internal switch will operate to connect the intercarrier output to the sif converter input. 16 1k ? 1k ? inter / split sw lo=inter ila06700 17 if agc filter if agc filter connection the signal peak-detected by the built-in agc detector is converted to the agc voltage at pin 17. additionally, a second agc filter (a lag-lead filter) used to create the dual time constants is provided internally in the ic. use a 0.022? capacitor as the external capacitor, and adjust the value according to the sag, agc speed, and other characteristics. 17 1k ? ila06701 18 19 vif input vif amplifier input. the input circuit is a balanced circuit, and the input circuit constants are: r 1.5k ? c 3pf 18 19 ila06702 20 gnd continued on next page.
pin no. pin description equivalent circuit first sif output. internally, this is an emitter-follower output with a 600 ? resistor attached. when used in an intercarrier system, the buzz characteristics can be improved by forming a chrominance carrier trap with this pin. no.7779-19/21 LA7567EV continued from preceding page. 21 rf agc vr rf agc vr connection. this pin sets the tuner rf agc operating point. also, the fm output and the video output can both be muted at the same time by connecting this pin to ground. 20k ? 20k ? 560 ? ila06703 21 4.2v 22 nicam output 22 20k ? 20k ? 6k ? 620 ? ila06704 23 fm filter connection for a filter used to hold the fm detector output dc voltage fixed. normally, a 1? electrolytic capacitor should be used. the capacitance should be increased if the low band (around 50hz) frequency characteristics need to be improved. the fm detector output level can be reduced and the fm dynamic range can be increased by inserting a resistor and a capacitor in series between pin 23 and ground. 1k ? 1k ? ila06706 23 c + r 24 fm detector output audio fm detector output. a 300 ? resister is inserted in series with an emitter-follower output. for applications that support stereo: applications that input this signal to a stereo decoder may find that the input impedance is reduced, the left and right signals are distorted, and that the stereo characteristics are degraded. if this problem occurs, add a resistor between pin 24 and ground. r1 5.1k ? for applications that support mono: create an external deemphasis circuit. t = c r2 r2 300 ? 10k ? c r1 ila06707 24 22 forms a chrominance killer trap.
notes on sanyo saw filters there are two types of saw filters, which differ in the piezoelectric substrate material, as follows: lithium tantalate (litao3) saw filter tsf11 ... japan tsf12 ... us although lithium tantalate saw filters have the low temperature coefficient of ?8ppm/?, they suffer from a large insertion loss. however, it is possible, at the cost of increasing the number of external components required, to minimize this insertion loss by using a matching circuit consisting of coils and other components at the saw filter output. at the same time as minimizing insertion loss, this technique also allows the frequency characteristics, level, and other aspects to be varied, and thus provides increased circuit design flexibility. also, since the saw filter reflected wave level is minimal, the circuit can be designed with a small in-band ripple level. lithium niobate (linbo3) saw filter tsf52 ... us tsf53 ... pal although lithium niobate saw filters have the high temperature coefficient of ?2ppm/?, they feature an insertion loss about 10db lower than that of lithium tantalate saw filters. accordingly, there is no need for a matching circuit at the saw filter output. although the in-band ripple is somewhat larger than with lithium tantalate saw filters, since they have a low impedance and a small field slew, they are relatively immune to influences from peripheral circuit components and the geometry of the printed circuit board pattern. this allows stable out-of-band trap characteristics to be acquired. due to the above considerations, lithium tantalate saw filters are used in applications for the us and japan that have a high if frequency, and lithium niobate saw filters are used in pal and us applications that have a low if frequency. notes on saw filter matching in saw filter input circuit matching, rather than matching the if frequency, flatter video band characteristics can be acquired by designing the tuning point to be in the vicinity of the audio carrier rather than near the chrominance carrier. the situation shown in figure on the right makes it easier to acquire flat band characteristics than that in figure on the left. with the tuning set to the if frequency with the tuning set to the vicinity of s and c no.7779-20/21 LA7567EV ila06708 the high band is reduced frequency saw filter characteristics frequency the high band is extended coil specifications toko co., ltd. 2-1-17 higashi-yukigaya, ohta-ku, tokyo, japan tel: +81-3-3727-1167 japan f = 58.75mhz us f = 45.75mhz pal f = 38.9mhz vco coil test production no. v291xcs-3220z test production no. 291xcs-3188z test production no. 292gcs-7538z toko co., ltd. toko co., ltd. toko co., ltd. saw filter picture picture picture (split) tsf1137u tsf1241 tsf5315 sound sound sound saw filter tsf5220 tsf5321 (inter) tsf5221 tsf5344 s t=5t 0.12 c=24pf ila06709 ila06710 s t=6t 0.12 c=24pf ila06711 s t=7t 0.12 c=24pf
no.7779-21/21 LA7567EV specifications of any and all sanyo products described or contained herein stipulate the performance, characteristics, and functions of the described products in the independent state, and are not guarantees of the performance, characteristics, and functions of the described products as mounted in the customer's products or equipment. to verify symptoms and states that cannot be evaluated in an independent device, the customer should always evaluate and test devices mounted in the customer's products or equipment. sanyo electric co., ltd. strives to supply high-quality high-reliability products. however, any and all semiconductor products fail with some probability. it is possible that these probabilistic failures could give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire, or that could cause damage to other property. when designing equipment, adopt safety measures so that these kinds of accidents or events cannot occur. such measures include but are not limited to protective circuits and error prevention circuits for safe design, redundant design, and structural design. in the event that any or all sanyo products(including technical data,services) described or contained herein are controlled under any of applicable local export control laws and regulations, such products must not be exported without obtaining the export license from the authorities concerned in accordance with the above law. no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, or any information storage or retrieval system, or otherwise, without the prior written permission of sanyo electric co. , ltd. any and all information described or contained herein are subject to change without notice due to product/technology improvement, etc. when designing equipment, refer to the "delivery specification" for the sanyo product that you intend to use. information (including circuit diagrams and circuit parameters) herein is for example only ; it is not guaranteed for volume production. sanyo believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. this catalog provides information as of august, 2005. specifications and information herein are subject to change without notice. notes on vco tank circuits built-in capacitor vco tank circuits when the power is turned on, the heat generated by the ic is transmitted through the printed circuit board to the vco tank circuit. at this point, the vco coil frame functions as a heat sink and the ic heat is dissipated. as a result, it becomes more difficult to transmit heat to the vco tank circuit's built-in capacitor, and the influence of drift at power on is reduced. therefore, it suffices to design the circuit so that the coil and capacitor thermal characteristics cancel. ideally, it is better to use a coil with a core material that has low temperature coefficient characteristics. external capacitor vco tank circuits when an external capacitor is used, heat generated by the ic is transmitted through the printed circuit board directly to the vco tank circuit external capacitor. while this capacitor is heated relatively early after the power is turned on, the coil is not so influenced as much by this heat, and as a result the power-on drift is increased. accordingly, a coil whose core material has low temperature coefficient characteristics must be used. it is also desirable to use a capacitor with similarly low temperature coefficient characteristics. note: applications that use an external capacitor here must use a chip capacitor. if an ordinary capacitor is used, problems such as the oscillator frequency changing with the capacitor orientation may occur.

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