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if signal processing circuit (a 2 c pll vif + sif) for tvs and vcrs overview the LA7583 is a vif + sif ic that requires no adjustments. in order to eliminate the need for adjustments in the vif block, a multi-network pll has been developed and adopted for video detection. in the sif block, adjustments were eliminated by using gyrator technology in the fm quadrature detector. in addition to eliminating the need for adjustments, a buzz canceller that suppresses nyquist buzz has been built into the LA7583 in order to provide excellent sound quality. features . elimination of vco, aft, and sif coils eliminates the need for adjustments. . a variety of built-in filters. . built-in buzz canceller results in excellent audio characteristics. note: a 2 c automatic adjustment control aqt automatic quadrature tuning package dimensions unit : mm 3067-dip24s [LA7583] 0.48 3.25 3.3 3.9max 0.51min 21.2 0.81 1.78 0.25 7.62 6.4 1 12 24 13 0.95 sanyo : dip24s functions [vif] . vif amplifier . multinetwork pll . bnc . fagc . equalizer amplifier . aft . ifagc . buzz canceller . agc lag lead filter . video driver [1st sif] . preamplifier . 1st sif detector . agc detector . built-in agc filter [sif] . limiter amplifier . aqt detector (gyrator) . j/u switch [mute] . audio mute . av mute ordering number: en5177 monolithic linear ic LA7583 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. sanyo electric co.,ltd. semiconductor company tokyo office tokyo bldg., 1-10, 1 chome, ueno, taito-ku, tokyo, 110-8534 japan 83095ha(ii) no.5177-1/16
specifications maximum ratings atta=25 c parameter symbol conditions ratings unit maximum supply voltage v cc 17v v cc 2 13.2 v circuit voltage v4 v cc 1v v3, v11 v cc 2v circuit current i 1, i 10, i 23 1 ma i 3, i 21 3 ma i 15, i 19 5 ma allowable power dissipation pd max t a % 50 c 1000 mw operating temperature topr 20 to +70 c storage temperature tstg 55 to +150 c *a 2 c (automatic adjustment control) note: current flowing into the ic is positive (no signal) and current flowing out is negative. pin assignment top view allowable power dissipation, pd max mw ambient temperature, ta c pd max e ta LA7583 no.5177-2/16
operating conditions atta=25 c parameter symbol conditions ratings unit recommended supply voltage v cc 15v v cc 29v operating supply voltage range v cc 1 4.6 to 6 v v cc 2 7 to 12 v electrical characteristics atta=25 c, v cc 1=5v,v cc 2 = 9 v, fp = 45.75 mhz parameter symbol conditions min typ max unit [vif block] circuit current 1 i20 v cc = 5 v 57 66 78 ma circuit current 2 i8 v cc = 9 v 7.8 11.0 14.0 ma maxinum rf agc voltage v3h v 4=3v 7.5 8.1 9 v mininum rf agc voltage v3l v4 = 1.5 v 0 +0.5 v input sensitivity vi s1 = off 32 38 44 db agc range g r 56 62 db maxinum allowable input vi max 95 103 db video output voltage with no signal v19 v4=2v 3.3 3.6 3.9 v sync signal tip voltage v19(tip) vi = 10 mv 1.1 1.4 1.7 v video output amplitude v o (v) 87.5% mod 1.7 2.0 2.3 vp-p black noise threshold level voltage v bth 0.4 0.7 1.1 v black noise clamp voltage v bcl 1.65 1.95 2.25 v output s/n s/n 48 52 db 920 khz beat level i920 p = 0 , c = 10 db, s = 10 db 41 45 db frequency characteristics f c p = 0, s = 14 db 6 8 mhz differential gain dg vi = 10 mv, 87.5% 3 8 % differential phase dp 10star step 3 8 rad aft output voltage with no signal v11 0.3 4.5 8.7 v maxinum aft output voltage v11h 7.5 8.5 9 v mininum aft output voltage v11l 0 +1 +1.5 v aft detection sensitivity sf 33 48 69 mv/khz vif input resistance ri(vif) f = 45.75 mhz 0.8 1.1 1.5 k w vif input capacity ci(vif) f = 45.75 mhz 2 3 5 pf apc pull-in range (u) f pu 1.0 3 mhz apc pull-in range (l) f pl 4.5 1.0 mhz aft crossover frequency d f a 65 +65 khz vco1 maximum variable range d f u 1 v22=4v 2.0 5.0 mhz d f l 1 v22=2v 5.0 2.0 mhz vco2 maximum variable range d f u 2 v16=4v 100 200 khz d f l 2 v16=2v 1000 200 khz vco1 control sensitivity b 1 v22 = 2.8 v to 3.2 v 2.4 4.8 9.6 khz/mv vco2 control sensitivity b 2 v16 = 2.8 v to 3.2 v 0.3 0.6 1.2 khz/mv [1st sif block] 4.5 mhz output gain vg v i=1mv, 41.25 mhz 23 26 29 db 4.5 mhz output level so vi = 10 mv, 41.25 mhz 50 85 120 mvrms 1st sif maximum input level si (max) so + 12 d b1db 60 70 mvrms 1st sif input resistance ri (sif1) f = 41.25 mhz 1.2 2 k w 1st sif input capacity ci (sif1) f = 41.25 mhz 3 6 pf continued next page. LA7583 no.5177-3/16
continued from preceding page. parameter symbol conditions min typ max unit [sif block] sif limiting sensitivity vi (lim) d f = 25 khz, 400 hz 47 53 59 db fm detection output voltage v o vi = 100 mv, d f = 25 khz, 400 hz 300 400 520 mvrms amr amr am = 30%, 400 hz 40 56 db total harmonic distortion thd d f = 25 khz, 400 hz 0.4 1.5 % sif s/n s/n(sif) d f = 25 khz, 400 hz 55 59 db [mute defeat] fm mute v24t 0.5 1.0 v aft defeat voltage vd11 3.9 4.5 5.1 v j/u sw start voltage vju24 1.5 2.0 2.5 v av mute voltage vm23 1 1.5 v LA7583 no.5177-4/16
equivalent circuit block diagram multinetwork pll (automatic adjustment control) the LA7583's pif detector uses a multinetwork pll and a buzz canceller. the multinetwork pll is a pll detector that was developed in order to eliminate the need for adjustments in video detection. this pll detector offers the following features: (1) eliminates the need for adjustments in video detection. (2) the pll detection characteristics are unaltered. a. offers better waveform response characteristics in comparison with the quasi-synchronous detection method. b. the harmonic wave component of the video signal (demodulated output) is reduced. c. the 1/2 if signal suppression ratio is improved. (3) audio buzz is greatly reduced by the buzz canceller. a typical pll detector consists of the blocks shown below. in these blocks, if the vco coil is not adjusted to the if frequency, a phase difference will appear in the control loop. as a result, the pll detector detection axis will shift from the ideal 180 . the group delay, dp characteristics, etc., deteriorate as a result. LA7583 no.5177-5/16
[multinetwork pll] the multinetwork pll consists of the blocks shown below. the multinetwork pll has two vco circuits. each of these form a separate pll. the operational relationship between these circuits is as follows: f vco1 =f vco2 8 initially, in apc1, the phases of the if signal and the vco carrier are compared. the control signal derived is then used to control vco2. vco1 is controlled by comparing the phases of vco2 and vco1 x 1/8. as a result, vco1 always has the same frequency as the if signal, and the following relationship results: f vco1 =f vco2 8 if the precision of the ceramic oscillator for f vco2 is within the adjustment range for vco in a typical pll, the video detector phase error is very small. as a result, the multinetwork pll operates as an ideal pll detector. automatic quadrature tuning (aqt) a quadrature detector that is controlled automatically is used in the fm detector. the aqt in the LA7583 consists of the blocks shown in the following diagram. the fm detection filter (gyrator) is controlled at 4.5 mhz by the control current (iref1) generated by reference circuit 1. at the same time, precision control is performed by using the control current (iref2) derived by detecting the offset from the detected output so that the fm detector phase relationship is 90 . as a result, automatic control makes an ideal quadrature detector possible. (note) gyrator: circuit-formed equivalent inductance the sif circuit contains a 4.5 mhz tank circuit having the gyrator and an internal capacitor. LA7583 no.5177-6/16
pin functions pin no. symbol circuit configuration description 1 fm detector output pin 1 is an audio fm output pin. a 100 w resistor is connected in series with the emitter follower. (1) monaural applications cr are used to form a de-emphasis cicuit externally. t = cr1 (2) audio multiplexing applications depending on the audio multiplexing decoder application, the input impedance is low, which may distort the l-r signals, etc., and degrade the stereo characteristics. in such an event, add a resistor between pin 1 and gnd. r2 ^ 5.1 k w 2 fm aqt filter gylator pin 2 is the fm automatic quadrature tuning filter pin. this pin controls the quadrature detector so that it remains at its center frequency (4.5 mhz), and is the point where the two control currents are added. if the value of external capacitor c1 is small, the low-range frequency characteristics deteriorate. if the capacitance is too large, the low-range characteristics improve, but the response characteristics at sw-on, etc., worsen. the recommended value for c1 is 10 f to 33 f. 3 rf agc output pin 3 is the rf agc output pin. it is an emitter output, and a protective resistor of 200 w is connected between pin 3 and emitter. this pin determines the resistance bleeder (r1, r2) values according to the maximum gain of the tuner. continued on next page. LA7583 no.5177-7/16
continued from preceding page. pin no. symbol circuit configuration description 4 if agc pin 4 is the 1st ifagc filter pin. this filter smoothes out the peaks detected in the signal by the agc detector, and generates the agc voltage. the 2nd agc filter (lag lead filter) is built in using filter technology. the cutoff frequency is approximately 500 hz. . agc filter constants and agc speed medium-speed agc: r1 = 330 k w c1 = 0.1 f high-speed agc: r1 = 470 k w c1 = 0.056 f 5 6 vif input pins 5 and 6 are the vif amplifier input pins. the vif amplifier has three stages, each of which use s a c cut, so when used in conjunction with a saw filter, dc cut by a capacitor becomes unnecessary. ri = 1.1 k w ci=3pf 9 1st sif input pin 9 is the 1st sif input pin. input is such that dc cut must be performed using a capacitor. when a saw filter, etc. is used in the input circuit, an l that is used to neutralize the saw filter output capacitance and the ic input capacitance serves to improve the 1st sif sensitivity. continued on next page. LA7583 no.5177-8/16
continued from preceding page. pin no. symbol circuit configuration description 10 vcor pin 10 is the pin for connecting the resistor that determines the impedance of the oscillation point of the oscillating circuit by the ceramic oscillator. oscillation frequency variations can be reduced by connecting a resistor with a tolerance of 1% between pin 10 and pin 12. 11 aft output pin 11 is the aft output pin. this pin determines the gain (control sensitivity: b (khz/mv)) according to the r1 and r2 bleeder resistance values. b is decreased in weak electric fields by agc voltage in order to reduce malfunction of aft. r1 and r2 must be 200 k w or less. aft curve for medium/ strong electric fields aft curve for weak electric fields 12 vco2 pin 12 is the ceramic oscillator (vco2) pin. a series resonance-type oscillator is used to oscillate 1/8 of the if signal. japan = 58.75 mhz 1/8 u.s. = 45.75 mhz 1/8 continued on next page. LA7583 no.5177-9/16
continued from preceding page. pin no. symbol circuit configuration description 13 14 vco coil pins 13 and 14 are the vco tank circuit. vco coil recommended . japan 1.2 h . u.s. 1.8 h make the circuit pattern between the ic and the coil as short as possible. 15 video output pin 15 is the sif carrier (4.5 mhz)-contained video output pin. the level of the video output is approximately 1.5 vp-p. 16 apc1 filter pin 16 is the apc1 filter pin. the filter smoothes the output after comparing the phase of the if signal with that of vco1 in apc1. c 1 = 0.47 f r 1 = 330 to 560 w c 2 = 470 pf continued on next page. LA7583 no.5177-10/16
continued from preceding page. pin no. symbol circuit configuration description 17 equalizer input pin 17 is the equalizer amplifier input pin. a signal which has passed through a 4.5 mhz trap is input through pin 17 and is output through pin 19. . the input level of pin 17 is 1.5 vp-p. this is amplified 3 db to 2 vp-p by the equalizer amplifier. 18 equalizer filter pin 18 is the equalizer pin. the equalizer amplifier is of the voltage follower type with a voltage gain of 3 db. to correct the frequency characteristics, connect lcr externally. the operating characteristics are as follows: av = ve vi =1+ r1 z (times) 19 equalizer output pin 19 is the equalizer amplifier output pin. this output has a built-in low-impedance drive circuit. continued on next page. LA7583 no.5177-11/16
continued from preceding page. pin no. symbol circuit configuration description 21 1st sifout pin 21 is the 1st sif output pin. the sif carrier output level is approximately 50 mvrms. 22 apc2 filter pin 22 is the apc2 filter pin. the filter smoothes the output after comparing the phase of vco2 with that of vco1 x 1/8 in apc2. c 1 = 0.47f r 1 =33 w 23 rf agc vr pin 23 is the rf agc adjusting pin. the adjustment point is where rv approximates 15 k w . av (audio/video) mute is effected by dropping this pin to gnd. continued on next page. LA7583 no.5177-12/16
continued from preceding page. pin no. symbol circuit configuration description 24 sif input, j/u sw pin 24 is used both for sif input and j/u sw audio mute. . the input impedance is approximately 1.5 k w . . j/u (japan/u.s.) switch the oscillating frequency for vco2 in japan and the u.s. differs. however, the center frequency of the sif detector is controlled using vco2 as a reference. as a result, the filter control mode can be changed either by leaving this pin open or dropping it to gnd through a 3.9 k w resistor. open: japan mode 3.9 k w : u.s. mode . audio mute: audio muting can be applied by dropping the voltage on this pin to 0.5 v or less. LA7583 vco coil design considerations 1. design criteria allow for an adequate variable range for the if frequency in the design. specifically, select a coil value so that the carrier frequency is roughly in the center of the characteristics diagram shown below when 2 v and 4 v are applied to pin 22. 2. design notes a. when selecting the l value, the LA7583 must be soldered directly on the board. if an ic socket is used, an error in the vco center frequency will arise from the capacitance of the socket. b. the patterns for pins 13 and 14 must be made as short as possible (15 mm or less). minimize the effect of the printed pattern. c. a vco coil of which tolerance is 5% must be used. 3. measuring the if frequency range drop the if agc (pin 4) to gnd. next, pick up the vco carrier leak at a pin other than the vco coil (pins 13 and 14) and read the carrier frequency. and then, apply a voltage ranging from 1.5 v to 4.5 v to pin 22, and record the characteristics of the maximum variable frequency range for vco as shown in the diagram below. 4. recommended vco coil a. tokyo parts industry co., ltd. 5lc japan 1.2 h 5% u.s. 1.8 h 5% us f o : 45.75 mhz japan f o : 58.75 mhz y22v y22v f o mhz f o mhz LA7583 no.5177-13/16
notes on sanyo saw filters there are two types of filters, depending on the piezoelectric substrate material. (1) litao 3 (lithium tantalate) saw filters: .......tsf1xxx tsf2xxx while the litao 3 saw filters offer excellent stability with a low temperature coefficient of 18 ppm/ c, the insertion loss is high. however, by using a coil, etc., to obtain proper matching on the saw filter output side (which does increase the number of external components), it is possible to suppress the insertion loss while at the same time making the level of the characteristics variable, which provides additional design freedom. (refer to fig. 13.) in addition, because the saw (surface wave) reflection is small, ripple within the band can be kept low. (2) linbo 3 (lithium niobate) saw filter: ......tsf5xxx while the linbo 3 saw filter has a high temperature coefficient of 72 ppm/ c, it has a lower insertion loss by about 10 db compared to the litao 3 saw filters. therefore, matching on the output side of the saw filter is not necessary. (refer to the diagram below.) in addition, because the insertion loss is low (although the ripple within the band is somewhat higher than in the case of the litao 3 saw filter), the low impedance and small feedthrough diminish the effects of peripheral circuit components and the pattern layout, and make it possible to stabilize the trap characteristics outside of the band. from the above, it is clear that the litao 3 saw filter is suitable for japan and u.s. bands where the if frequency is high, while the linbo 3 saw filter is suitable for pal and u.s. bands where the if frequency is low. (a) picture wide band saw filter japan tsf1137u u.s. tsf1241u(with is-31 trap) (b) inter carrier saw filter japan tsf1138p u.s. tsf1220p litao 3 saw filter linbo 3 saw filter LA7583 no.5177-14/16
test circuit diagram LA7583 (u.s.) *1. tdk ceramic oscillator fcr5.71m2sf3 *2. micro-inductor 5lc1r8, made by tokyo parts industry co., ltd. *1 *2 LA7583 no.5177-15/16
LA7583 ps no.5177-16/16 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, 1995. specifications and information herein are subject to change without notice.

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