View LA75505M_1546569.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

ordering number : enn * 6930 41301rm (ot) no. 6930-1/13 overview the LA75505M is a vif/sif signal processing ic for ntsc tv/vcr. it supports the 45.75 mhz and 58.75 mhz as the if frequencies. on-chip sound carrier trap and sound carrier bpf circuits make it ideal for compact and light-weight tuner applications. to adjust the vco circuit, aft circuit, and sound filter, 4-mhz external crystal or 4- mhz external signal is needed. functions vif amplifier vco adjustment free pll detection circuit digital aft circuit rf agc buzz canceller equalizer amplifier internal sound carrier bpf internal sound carrier trap pll-fm detector reference oscillation circuit features internal vco adjustment free circuit eliminating need for vco coil adjustments. considerably reduces the number of required peripheral parts by providing on-chip sound carrier bpf and sound carrier trap circuits. use of digital aft eliminates problem of aft tolerance. package: mfp24s (300 mil) package dimensions unit: mm 3112-mfp24s 112 24 13 12.6 0.8 1.0 0.15 0.35 5.4 6.35 7.6 0.625 1.8max 1.5 0.1 preliminary sanyo: mfp24s (300 mil) [LA75505M] LA75505M sanyo electric co.,ltd. semiconductor company tokyo office tokyo bldg., 1-10, 1 chome, ueno, taito-ku, tokyo, 110-8534 japan adjustment free vif/sif signal processing ic for tv/vcr monolithic linear ic 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? 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.
no. 6930- 2 /13 LA75505M parameter symbol conditions ratings unit maximum supply voltage v cc max 7 v allowable power dissipation pd max ta 70 c ( * mounted on a printed circuit board) 470 mw operating temperature topr ?0 to +70 c storage temperature tstg ?5 to +150 c specifications maximum ratings at ta = 25 c parameter symbol conditions ratings unit recommended supply voltage v cc 5 v operating voltage range v cc op 4.5 to 5.5 v operating conditions at ta = 25 c parameter symbol conditions ratings unit min typ max [vif block ] circuit current i17 64.0 73.6 ma maximum rf agc voltage v14h collector load 30 k vc2 = 9 v 8.5 9 v minimum rf agc voltage v14l 0.3 0.7 v input sensitivity vi 33 39 45 db v agc range gr 58 db maximum allowable input vimax 92 97 db v no-signal video output voltage v4 3.3 3.6 3.9 v synchronizing signal tip voltage v4tip 1.0 1.3 1.6 v video output level v o 1.7 2.0 2.3 vpp video signal-to-noise ratio s/n 46 50 db c-s beating ic-s p/s = 10 db 26 32 38 db differential gain dg vin = 80 db 3 10 % differential phase dp 2 10 deg vif input resistance ri 2.5 3.0 k vif input capacitance ci 3 6 pf maximum aft voltage v13h 4.3 4.7 5.0 v minimum aft voltage v13l 0 0.2 0.7 v aft tolerance 1 dfa1 f = 45.75 mhz 35 45 khz aft tolerance 2 dfa2 f = 58.75 mhz 45 70 khz aft detection sensitivity sf rl = 100 k //100 k 40 80 120 mv/khz aft dead zone fda 60 100 khz apc pull-in range (u) fpu 1.0 1.5 mhz apc pull-in range (l) fpl 1.0 1.5 mhz vco maximum frequency range (u) dfu 1.5 2.0 mhz vco maximum frequency range (l) dfl 1.5 2.0 mhz vco control sensitivity b 2.0 4.0 8.0 khz/mv n trap1 (4.75 mhz) nt1 wrt 1 mhz ?0 ?5 db n trap2 (5.25 mhz) nt2 wrt 1 mhz ?9 ?4 db group delay 1 ntsc (3.0 mhz) ngd1 wrt 1 mhz 10 40 70 ns group delay 1-1 ntsc (3.5 mhz) ngd1-1 wrt 1 mhz 70 120 170 ns electrical characteristics at ta = 25 c, v cc = 5.0 v, fp = 45.75 mhz note: * circuit board dimensions: 114.3 76.1 1.6 mm 3 , material: glass epoxy continued on next page.
no. 6930- 3 /13 LA75505M continued from preceding page. parameter symbol conditions ratings unit min typ max [1st sif block] conversion gain vg fp = 4.5 mhz, vi = 500 v 26 32 db sif carrier output level so vi = 10 mv 100 mvrms first sif maximum input simax so 2 db 106 db v first sif input resistance ris 5.0 6.0 k first sif input capacitance cis 3 6 pf [sif block] limiting sensitivity vi(lim) fp = 4.5 mhz, ? f = 25 khz at 400 hz 61 db v fm detector output voltage vo(fm) 480 600 750 mvrms am rejection ratio amr am = 30% at 400 hz 50 60 db total harmonic distortion thd f = 4.5 mhz, ? f = 25 khz 0.5 1.0 % fm detector output s/n s/n(fm) 55 60 db bpf 3-db bandwidth bw 100 khz ntsc de-emphasis ndeem fm = 2 khz ? db [others] 4-mhz level (during external input) x4min terminated 86 db if system sw threshold resistance v12 270 k split/inter sw v16 0.5 v
system switching no. 6930- 4 /13 LA75505M ?if system switch 45.75 mhz is selected as the if frequency by leaving pin 12 (crystal oscillation) open. 58.75 mhz is selected by adding 220 k between pin 12 and gnd. ?split/inter carrier switch inter carrier is selected by setting the first sif input (pin 16) to gnd. pin assignment 19 2 1 sif input fm filter 1st sif out video det out eq out apc filter fll filter vco coil vco coil sif agc filter nc ref osc fm det out rf agc vr sif pll filter filter control capacitor vif input vif input gnd vcc 1st sif input if agc filter rf agc out aft out 3 4 5 6 7 8 9 16 17 18 20 21 22 23 24 10 11 12 13 14 15 top view LA75505M
no. 6930- 5 /13 LA75505M test circuit input impedance measuring circuit (vif, first sif input impedance) 24 23 22 21 20 19 18 17 16 15 14 13 1 2 3 4 5 6 7 8 9 10 11 12 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 100 f 10 k 1 k 15 k 0.01 f 0.01 f vif input impedance analyzer 1st sif input v cc LA75505M top view + 0.01 f 0.01 f 0.01 f 0.01 f 0.01 f 0.01 f
no. 6930- 6 /13 LA75505M pin functions pin no. pin pin function internal circuit inputs the sif signal from the first sif output. set the input level to 90 db v or lower because of the dynamic range of the internal filter. 1 sif input this is the fm feedback filter pin. it is composed of a c and r filters. 1 f is normally used as the capacitance. if the capacitance is a low value, the audio output level is small at low frequencies. moreover, the audio output level can be made smaller by increasing the resistance connected in series. use a resistance of 3 k or higher. 2 fm filter this is the first sif output. in case of inter carrier, the chroma carrier is bigger than split carrier applications, so that it is recommended to connect a filter externally. 3 1st sif out filter example continued on next page.
no. 6930- 7 /13 LA75505M continued from preceding page. continued on next page. pin no. pin pin function internal circuit pin 4 is the video output pin. the eq amplifier can be thought of as shown below. 4 5 video-out eq-out output time constant switch output pin 6 is the pll detector apc filter pin. normally the following are used: r = 330 c1 = 0.47 to 1 f c2 = 100 pf c1 = 1 f is effective for the overmodulation characteristics. when the pll is locked, the signal passes via the path marked a in the figure, and when pll is unlocked and in weak signal, the signal passes via the path marked b in the figure. the pll loop gain can thus be switched in this manner. pin 7 is a vco automatic control fll filter pin. since it operates always on a small current, using a larger capacitance results in a slower response. normally, a capacitance between 0.47 f and 1 f is used. moreover, the control range for this pin is between about 3 v to 4.7 v. since this range is determined when adjusting the vco tank circuit, set the design center of l and c of vco so that the voltage of pin 7 is 3.6 v. 6 7 apc filter fll filter therefore, the peak gain of the eq amplifier is determined by av = 1 + r/z. however, note that the LA75505M being an ic with v cc = 5 v, setting too large an amplitude causes distortion in the v cc side. use so that the white level is 4 v or less. this is the vco tank circuit for the pll detector. use a tuning capacitance of 24 pf. for the l and c specifications, use if45.75 mhz specifications within 1.5%, and 58.75 mhz specifications within 1%. also, design the l and c values so that the voltage of pin 7 is 3.6 v when pll is locked while using the if center frequency. 8 9 vco coil
no. 6930- 8 /13 LA75505M continued from preceding page. pin no. pin pin function internal circuit this pin can be used both as the crystal resonator pin and if switch. the 58.75-mhz mode is selected by inserting 220 k between pin 12 and gnd, the 45.75 mhz mode by leaving the pin open. 4-mhz input is possible from this pin. in the case of 4-mhz external input, input 86 db or more. 12 ref osc continued on next page. pin 10 is the sif agc filter pin. use a capacitance of 0.01 f to 0.1 f. 10 sif agc filter 1 0 not connected 11 nc pin 13 is the aft output pin. use external resistors of 47 k and a filter capacitance 0.1 f. the aft circuit generates the aft voltage by comparing the signal obtained by dividing the 4-mhz reference frequency with the signal obtained by dividing vco. since it uses a digital phase comparator, a dead zone exists in the aft center. 13 aft out waveform
no. 6930- 9 /13 LA75505M continued from preceding page. pin no. pin pin function internal circuit pin 14 is the rf agc output. rf agc max is determined by r1 and r2. rf agc min is determined by r3 and r4. capacitor c1 prevents oscillation and capacitor c2 is the rf agc filter. normally 30 k is used for r1, but if the tuner's f/e transistor is gaas, the gate's impedance is lower, so use approx. 10 k . 14 rf agc out pin 15 is the if agc filter pin. normally, 0.01 f to 0.02 f polyester film capacitor is used. determine the impedance based on h-sag and agc speed. 15 if agc filter continued on next page. pin 16 can be used both as the first sif in and inter/split switch pins. in the case of inter carrier, connect pin 16 to gnd. when a sound saw filter is added, the matching loss can be decreased by inserting l to neutralize the ic input capacitance and saw filter output capacitance. 16 1st sif input
no. 6930- 10 /13 LA75505M continued from preceding page. pin no. pin pin function internal circuit pins 19 and 20 are vif input pins. to reduce the loss of signal through a saw filter, input registors are set to 2 k . vif amplifier has three capacitive coupling amplifiers, direct connection from a saw filter is available. 19 20 vif input continued on next page. connect the decoupling capacitor as close as possible. 17 v cc 18 gnd internal filters (i.e. sound carrier bpf and sound carrier trap) are tuned using the capacitor connected to pin 21. a value between 0.47 f and 1 f is considered desirable taking video s/n, and am and pm noise into consideration. 21 filter control capacitor
no. 6930- 11 /13 LA75505M continued from preceding page. pin no. pin pin function internal circuit 22 sif pll filter pin 22 is the sif pll filter pin. normally use the following values. r: 3 k c1: 0.01 f c2: 1000 pf when r is too large, the pll may become unlocked, so use a resistance value within 6 k . a smaller r value results in low-pass noise. pin 23 is the rf agc vr pin. when this pin is connected to gnd, no signal is appeared on pin 4 and pin 24. 23 rf agc vr 24 fm det out pin 24 is the fm output pin. time constance of de-emphasis is determined by external c, r. please chose c, r to make time constance 75 s.
no. 6930- 12 /13 LA75505M sample application circuit fm det lim amp bpf bpf fm det if agc vif amp 1st amp agc aft amp s pll fll vco lpf trap eq amp fil cont amp sw video det apc det 1stsif det 1 3k 39p carrier out 2k video out 330 1 vco coil 1 4mhz x?tal 220k if sw open:45.75mhz gnd :58.75mhz 0.01 7.5k audio out 1000p 0.01 3k 1 0.1 aft out 47k 47k unit capacitance: f resistance: rf agc out 0.02 0.01 0.01 100 30k 0.01 if input vcc(5v) vcc(9v) saw(p) saw(s) 0.01 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
ps no. 6930- 13 /13 LA75505M this catalog provides information as of april, 2001. specifications and information herein are subject to change without notice. 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? 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? 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 ?elivery 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.

▲Up To Search▲

Price & Availability of LA75505M

	To Download LA75505M Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .