70109 sy pc/o2703si (ot) /91002rm (ot) no.7185-1/9 specifications of any and all sanyo semiconductor co.,l td. 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 ' sproductsor equipment. any and all sanyo semiconductor co.,ltd. products described or contained herein are, with regard to "standard application", intended for the use as general el ectronics equipment (home appliances, av equipment, communication device, office equipment, industrial equ ipment etc.). the products mentioned herein shall not be intended for use for any "special application" (medica l equipment whose purpose is to sustain life, aerospace instrument, nuclear control device, burning appliances, t ransportation machine, traffic signal system, safety equipment etc.) that shall require extremely high level of re liability and can directly threaten human lives in case of failure or malfunction of the product or may cause har m to human bodies, nor shall they grant any guarantee thereof. if you should intend to use our products for app lications outside the standard applications of our customer who is considering such use and/or outside the scope of our intended standard applications, please consult with us prior to the intended use. if there is n o consultation or inquiry before the intended use, our customer shall be solely responsible for the use. LA1845N overview the LA1845N is designed for use in mini systems and is a single-chip tuner ic that provides electronic tuning functions using sd/if-count technigue. it incorporates a pilot cancel er and an adjustment-free mux vco circuit, thus allows additional parts to be reduced. features ? integrated mpx vco (ceramic resonators are no longer required.) ? built-in adjacent channel interference rejection function (114khz, 190khz) ? supports both sd and if-count techniques ? both fm sd sensitivity and bandwidth can be set ? pilot canceler built in. functions ? am : rf amplifier, mixer, oscillator, if amplifier, det ector agc, sd, oscillator buffer, if buffer, stereo if output, agc time constant switch ? fm-if : if amplifier, quadrature det ector, s-meter, sd (signal detection), s-curve detection, if buffer output ? mpx : pll stereo decoder, stereo display, forced monaural, vco stop, audio muting, adjacent channel interference rejection function, pilot canceler specifications maximum ratings at ta = 25 c parameter symbol conditions ratings unit maximum supply voltage v cc max 9v allowable power dissipation pd max ta = 80 c 400 mw operating temperature topr -20 to +80 c storage temperature tstg -40 to +125 c monolithic linear ic for home stereo ic single-chip tuner ic orderin g numbe r : en7185c
LA1845N no.7185-2/9 operating conditions at ta = 25 c parameter symbol conditions ratings unit recommended supply voltage v cc 8v operating supply voltage range v cc op ta = 80 c 4.3 to 8.5 v electrical characteristics at ta = 25c, v cc = 8v, in the specified test circuit. ratings parameter symbol conditions min typ max unit fm mono characteristics fc = 10.7mhz, vi = 100db , fm = 1khz, modulation = 75khz current drain i cco-fm with no input signal 20 30 40 ma demodulator output v ofm 100db , 100% modulation, fm = 1khz 230 360 460 mvrms total harmonic distortion thd fm 100db , 100% modulation, fm = 1khz 0.35 1.5 % signal-to-noise ratio s/n fm 100db , 100% modulation, fm = 1khz 73 80 db am rejection ratio amr 100db , am 30% modulation, fm = 1khz 47 65 db 3db sensitivity 100db , 100% modulation, fm = 1khz output reference, -3db input 32 40 db sd sensitivity 0% modulation 38 47 56 db if counter buffer output v ifbuff-fm 100db 200 275 400 mvrms mute attenuation mute-att 100db , 100% modulation, fm = 1khz 76 db fm stereo characteristics fc = 10.7mhz, vi = 100db , fm = 1khz, l + r = 90%, pilot = 10% separation sep l l + r = 90%, pilot = 10%, fm = 1khz 30 42 db stereo on level st on pilot input 1.5 3.5 5.5 % total harmonic distortion thd-main pilot input 0.45 1.5 % brej-3rd fs = 113khz, vs = 90%, pilot = 10% : the left - right modulation, demodulated output 36 db adjacent channel rejection ratio brej-5th fs = 189khz, vs = 90%, pilot = 10% : the left - right modulation, demodulated output 41 db carrier leak l + r = 90%, pilot = 10% reference, pilot = 10% output 38 44 db am characteristics fc = 1000khz, vi = 80db , fm = 1khz, modulation = 30% current drain i cco-am with no input signal 13 27 39 ma v oam1 23db , 30% modulation, fm = 1khz 40 80 160 mvrms detector output v oam2 80db , 30% modulation, fm = 1khz 90 160 230 mvrms s/n am1 23db , 30% modulation, fm = 1khz 17 23 db signal-to-noise ratio s/n am2 80db , 30% modulation, fm = 1khz 46 52 db thd am1 80db , 30% modulation, fm = 1khz 0.4 1.1 % total harmonic distortion thd am2 107db , 30% modulation, fm = 1khz 0.5 1.3 % sd sensitivity 0% modulation 11 20 29 db local oscillator buffer output v osc-am with no input signal 100 140 200 mvrms if counter buffer output v ifbuff-am 23db 140 285 400 mvrms
LA1845N no.7185-3/9 package dimensions unit : mm (typ) 3067b block diagram sanyo : dip24s(300mil) 1 12 24 13 21.0 3.9 max 0.51min 3.3 0.95 6.4 7.62 0.25 1.78 0.48 0.9 (0.71) (3.25) + + + + + + + 1 2 5 6 10 12 24 23 22 21 20 19 18 17 16 15 14 13 tuning drive gnd reg v cc agc alc fm band-w buff comp s-curve vco 304khz stereo sw decoder anti-birdie pilot cancel level det am/fm if buff am rf.amp am mix am osc am if am det ff 19k 0 pilot det p-det v cc (4.3 to 8.5v) top view st mono am fm fm if fm det ff 19k 2 ff 38k r v-sm rf osc vt fm sd adj osc buff fm-in (10.7mhz) l st-led am/fm if-buff seek mute tu-led for am stereo if out 450khz 7 4 9 8 11 3
LA1845N no.7185-4/9 test circuit pin functions pin no. pin function pin voltage (v) pin description equivalent circuit 1 fm if input vreg input impedance r i = 330 1 3 2 am mixer output v cc connect the mixer coil between this pin and v cc . 2 3 reg 2.3 vreg = 2.3v 3 4 am if input vreg input impedance r i = 2k 4 5 gnd 0 6 7 tu-led st-led / am-if output v cc v cc active low open collector 6 7 8 fm detector v cc the 600beas-10471 (toko mfg. co., ltd.) is recommended for detector coil. 9 v cc 10 am / fm if counter output, output control switch, mute switch 0 v 10 0.5v : reception state 1.4v v 10 2.2v : muting on v 10 3.5v : if counter output and muting on 10 continued on next page. + + + 1 2 5 6 10 24 23 22 21 20 19 18 17 16 15 14 13 v cc 5.0v top view mono + osc buff fm-in (10.7mhz) + am/fm if-buff seek 1 f1 f + 0.47 f 3k 50k 33 f 75 300 6.8k 5.6k 1000pf 20pf 39pf 1000pf 0.047 f 0.047 f 22 f 0.047 f 0.0047 f 0.015 f 0.015 f 10 f 0.1 f 0.01 f + 4.7 f 0.047 f 3.3 f 39mh hw50425 50k 10k 1000pf normal tu-led st-led v-sd v-st am if 600beas-10471 detector coil discriminator hw6215 7 4 9 8 11 3 am fm 12 20pf 1000pf 50 20k 20k 65k am-in (1mhz) lpf a lpf a 0db l out r out LA1845N
LA1845N no.7185-5/9 continued from preceding page. pin no. pin function pin voltage (v) pin description equivalent circuit 11 phase comparator low-pass filter (am/fm switching) v cc -1.0 the device operates in am mode when a current of over 200 a flows from pin.12. limit values for the resistor : 2.7k (when v cc = 7v) 3.9k (8v) 11 12 pilot detector low-pass filter (forced mono) (vco stop) v cc -1.0 the device is forced to monaural when a current of over 50 a flows from this pin. the vco is stopped when a current of over 200 a flows from this pin. the limit values for the resistor are the same as those for pin 11. 12 13 14 l outputs r outputs 3.2 3.2 output impedance r o = 3.3k 13 ( 14 ) 15 pilot canceler output vreg 15 3 16 decoder input vreg inverting input pin rnf = 20k rnf 16 17 pll input vreg input impedance r i = 20k 17 18 fm demodulator output vreg + 0.7 output impedance r o = 2.3k the channel separation can be adjusted with an external capacitor connected between this pin and ground. 18 19 am detector output 0 (fm) 1.5 (am) output impedance r o = 10k 100v 19 20 s meter, am agc 0.2 (fm) 0.9 (am) the resistance of the built-in resistor r is 13.9k the sd responce during seek operation is determined with the external capacitor connected to this pin. 20 r 21 am rf input vreg must be used at the same potential as pin 22. 21 22 afc vreg the fm sd bandwidth can be adjusted with the external resistor connected between this pin and pin 3 (vreg). 22 continued on next page.
LA1845N no.7185-6/9 continued from preceding page. pin no. pin function pin voltage (v) pin description equivalent circuit 23 osc v cc connect the oscillator coil between this pin and pin 9 (v cc ). note : impedance of the secondary oscillator coil must be 5k or higher. 23 24 oscillator buffer output, fm sd sensitivity adjustment v cc -1.4 the fm sd sensitivity can be adjusted with an external resistor connected to this pin. output impedance r o = 200 note : resistance of the external resistor connected to the pin 24 must be 3.3k or higher. 24
LA1845N no.7185-7/9 --70 --60 --50 --40 --30 --20 --10 0 10 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 --100 --80 --60 --40 --20 0 080 20 40 60 20 40 60 80 100 100 120 --70 0 40 34 56789 4 100 1k 10k 56789 10 3 10 input, input -- db output voltage, v o -- dbv 10 20 30 0 1 2 3 4 5 0.1 1.0 6 0 0.5 1.0 1.5 2.0 --1.0 --0.5 0 0.5 1.0 040 20 60 80 100 10.70 10.65 10.75 120 input, input -- db s-meter voltage, vsm -- v total harmonic distortion, thd -- % multiplex frequency characteristics 1 0.01 --60 --50 --40 --30 --20 --10 0 3.5 0.5 1.0 1.5 2.0 2.5 3.0 0 10 10 100 1k 10k 100k modulation frequency, fm -- hz total harmonic distortion, thd -- % multiplex frequency characteristics 2 am supply voltage characteristics 2 20 30 40 50 60 10 100k modulation frequency, fm -- hz channel separation, sep -- db supply voltage, v cc -- v signal-to-noise ratio, sn -- db channel separation, sep -- db 10.60 10.80 frequency, fc -- mhz total harmonic distortion, thd -- % afc voltage, vafc -- v 0 120 input, input -- db output voltage, v o -- dbv total harmonic distortion, thd -- % s-meter voltage, vsm -- v am input/output characteristics supply voltage, v cc -- v output voltage, v o -- dbv total harmonic distortion, thd -- % s-meter voltage, vsm -- v am supply voltage characteristics 1 fm input/output characteristics 1 fm input/output characteristics 2 fm detuning characteristics thd thd thd vsm80 vsm40 vsm0 thd afc vsm s n s n s n am vsm l r sub mono main st sd sn23
LA1845N no.7185-8/9 --90 --60 --50 --40 --30 --20 --70 --80 --10 0 0 1 2 3 4 5 6 7 8 9 10 20 30 40 50 37 456 456789 8910 10 50 5 --40 --20 0 20 40 60 80 --200 20406080 10.7 100 10.6 10.8 supply voltage, v cc -- v output voltage, v o -- dbv 1 2 3 4 0 10 20 30 40 50 10 20 30 60 0 1 2 3 4 5 6 --80 --60 --40 --20 0 0 0.5 1.5 2.5 1.5 20 3.0 24 356789 20 0406080 10 supply voltage, v cc -- v channel separation, sep -- db st sensitivity, vl -- % am temperature characteristics 2 0 20 30 40 0 1.5 --1.0 --0.5 0 0.5 1.0 --1.5 40 --40 --20 0 20 40 60 80 100 ambient temperature, ta -- c sensitivity, sens -- db fm temperature characteristics 1 fm temperature characteristics 3 --100 --80 --60 --40 --20 0 0 1 2 3 4 5 6 --40 100 ambient temperature, ta -- c output voltage, v o -- dbv total harmonic distortion, thd -- % s-meter voltage, vsm -- v input frequency, fc -- mhz total harmonic distortion, thd -- % afc voltage, vafc -- mv --40 --20 100 ambient temperature, ta -- c output voltage, v o -- dbv total harmonic distortion, thd -- % s-meter voltage, vsm -- v 310 supply voltage, v cc -- v sensitivity, sens -- db total harmonic distortion, thd -- % s-meter voltage, vsm -- v fm supply voltage characteristics 1 ambient temperature, ta -- c sensitivity, sens -- db fm temperature characteristics 2 fm supply voltage characteristics 2 multiplex supply voltage characteristics 1 am temperature characteristics 1 thd thd vsm100 vsm100 vsm70 vsm70 vsm40 vsm80 am am vsm0 vsm0 vsm0 vloff vlon sepr sepl thd s s s n n n sd ls sd ls sn23 sd thd 75 c afc 75 c thd -25 c afc -25 c thd 25 c afc 25 c thd 50 c afc 50 c thd 0 c afc 0 c
LA1845N ps no.7185-9/9 sanyo semiconductor co.,ltd. assumes no responsib ility for equipment failures that result from using products at values that exceed, even momentarily, rate d values (such as maximum ra tings, operating condition ranges, or other parameters) listed in products specif ications of any and all sanyo semiconductor co.,ltd. products described or contained herein. sanyo semiconductor co.,ltd. strives to supply high-qual ity high-reliability products, however, any and all semiconductor products fail or malfunction with some probabi lity. it is possible that these probabilistic failures or malfunction could give rise to acci dents or events that could endanger human lives, trouble that could give rise to smoke or fire, or accidents that could cause dam age to other property. when designing equipment, adopt safety measures so that these kinds of accidents or e vents cannot occur. such measures include but are not limited to protective circuits and error prevention c ircuits for safe design, redundant design, and structural design. upon using the technical information or products descri bed herein, neither warranty nor license shall be granted with regard to intellectual property rights or any other rights of sanyo semiconductor co.,ltd. or any third party. sanyo semiconductor co.,ltd. shall not be liable f or any claim or suits with regard to a third party's intellctual property rights which has resulted from the use of the technical information and products mentioned above. information (including circuit diagr ams and circuit parameters) herein is for example only; it is not guaranteed for volume production. any and all information described or contained herein are subject to change without notice due to product/technology improvement, etc. when designing equi pment, refer to the "delivery specification" for the sanyo semiconductor co.,ltd. product that you intend to use. in the event that any or all sanyo semiconductor c o.,ltd. products described or contained herein are controlled under any of applicable local export control laws and regulations, such products may require the export license from the authorities conc erned 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 in formation storage or retrieval system, or otherwise, without the prior written consent of sanyo semiconductor co.,ltd. this catalog provides information as of july, 2009. specifications and informat ion herein are subject to change without notice. 20 40 50 30 60 0 0.5 1.0 1.5 2.0 --40 40 --20 0 20 --200 20406080 60 80 100 ambient temperature, ta -- c channel separation, sep -- db 50 60 70 80 90 -- 8 -- 6 -- 4 -- 2 8 0 2 4 6 0 0.5 1.0 1.5 4.0 2.0 2.5 3.0 3.5 --40 --20 40 20 06080 20 0406080 100 ambient temperature, ta -- c signal-to-noise ratio, sn -- db muting attenuation, matt -- db --40 --20 100 ambient temperature, ta -- c free-running frequency drift, f -- % capture range, cr -- % st sensitivity, vl -- % --40 100 ambient temperature, ta -- c total harmonic distortion, thd -- % multiplex temperature characteristics 1 multiplex temperature characteristics 2 multiplex temperature characteristics 3 multiplex temperature characteristics 4 sepl sepr cr + cr - vlon vloff ff s/nmono m att s/nst thdmono thdmain thdst thdsub
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