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83006 / 52106 ms ot b8-7111 no.7930a-1/11 any and all sanyo semiconductor 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 semiconductor representative nearest you before usingany sanyo semiconductor products described or contained herein in such applications. sanyo semiconductor 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 semiconductor products described or contained herein. la1844 LA1844M overview the la1844, LA1844M is designed for use in mini systems and is a single-chip tuner ic that provides electronic tuning functions using sd/if-count technique. it incorporates a pi lot canceler 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. ? package : dip24s(300mil) [la1844], mfp24s(300mil) [LA1844M] 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 detector, s-meter, sd (signal detection), s-curve detection, if buffer output ? mpx : pll stereo decoder, stereo di splay, forced monaural, vco stop, audi o muting, adjacent channel interference rejection function, pilot canceler orderin g number : en7930a monolithic linear ic for home stereo single-chip tuner ic
la1844,LA1844M no.7930a-2/11 specifications maximum ratings at ta = 25 c parameter symbol conditions ratings unit maximum supply voltage v cc max 9v ta 45 c 400 mw allowable power dissipation pd max ta 80 c 260 mw operating temperature topr -20 to +80 c storage temperature tstg -20 to +150 c operating conditions at ta = 25 c parameter symbol conditions ratings unit recommended supply voltage v cc 5v operating supply voltage range v cc op 4.3 to 8.0 v electrical characteristics at ta = 25 c fm mono characteristics at f c = 10.7mhz, v cc = 5v ratings parameter symbol conditions min typ max unit current drain i cco-fm with no input signal 18 28 38 ma demodulator output v ofm 100db , 100% modulation, fm = 1khz 210 330 420 mvrms total harmonic distortion thd fm mono 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 vi-limit 100db , 100% modulation, fm = 1khz output reference, -3db input 32 40 db sd sensitivity led sens 0% modulation 37 47 57 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 at f c = 10.7mhz, 100db , v cc = 5v ratings parameter symbol conditions min typ max unit separation sep 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 % adjacent channel rejection ratio 1 br1 fs = 113khz, vs = 90%, pilot = 10% : the left - right modulation, demodulated output 36 db adjacent channel rejection ratio 2 br2 fs = 189khz, vs = 90%, pilot = 10% : the left - right modulation, demodulated output 41 db carrier leak cl l+r = 90%, pilot = 10% reference, pilot = 10% output 38 44 db am characteristics at f c = 1000khz, v cc = 5v ratings parameter symbol conditions min typ max unit current drain i cco-am with no input signal 11 22 33 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 48 54 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 sd-sens 0% modulation 11 21 31 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
la1844,LA1844M no.7930a-3/11 package dimensions unit : mm 3067b [1844m] 3112b [la1844] 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) sanyo : dip24s(300mil) 1 12 13 24 12.5 0.63 7.6 5.4 0.15 1.0 0.35 (0.75) 1.7max 0.1 (1.5) sanyo : mfp24s(300mil)
la1844,LA1844M no.7930a-4/11 block diagram
la1844,LA1844M no.7930a-5/11 test circuit
la1844,LA1844M no.7930a-6/11 pin functions pin no. function pin voltage (v) equivalent circuit notes 1 fm if input vreg input impedance r i = 330 2 am mixer output v cc connect the mixer coil between this pin and v cc 3 reg 2.1 vreg = 2.4v 4 am if input vreg input impedance r i = 2k 5 gnd 0 6 7 tu-led st-led / am-if output v cc active low open collector 8 fm detector v cc the 600beas-10471 (toko mfg. co., ltd.) is recommended for detector coil. 9 vcc 5.0 10 am / fm if counter output, output control switch, mute switch 0 v 10 0.5v : reception state (normal) 1.4v v 10 2.2v : muting on (mute) v 10 3.5v : if counter output and muting on (seek) 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. continued on next page.
la1844,LA1844M no.7930a-7/11 continued from preceding page. pin no. function pin voltage (v) equivalent circuit notes 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. 13 14 l outputs r outputs 3.2 output impedance r o = 3.3k 15 pilot canceler output vreg 16 decoder input vreg inverting input pin rnf = 20k 17 pll input vreg input impedance r i = 20k 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. 19 am detector output 0 (fm) 1.5 (am) output impedance r o = 3.3k 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. continued on next page.
la1844,LA1844M no.7930a-8/11 continued from preceding page. pin no. function pin voltage (v) equivalent circuit notes 21 am rf input vreg must be used at the same potential as pin 22 22 afc vreg the fm sd bandwidth can be adjusted with the external resistor connected between this pin and pin 3 (reg) 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. 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.
la1844,LA1844M no.7930a-9/11
la1844,LA1844M no.7930a-10/11
la1844,LA1844M ps no.7930a-11/11 specifications of any and all sanyo semiconductor p roducts 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 semiconductor co., ltd. strives to supply high- quality high-reliability products. however, any and all semiconductor products fail with some probabili ty. 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 semiconductor produ cts (including technical data,services) described or contained herein are controlled under any of applic able local export control laws and regulations, such products must not be exported without obtaining t he export license from the authorities concerned in accordance with the above law. no part of this publication may be reproduced or trans mitted 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 permi ssion of sanyo semiconductor co., ltd. any and all information described or contained he rein are subject to change without notice due to product/technology improvement, etc. when designing equipment, refer to the "d elivery specification" for the sanyo semiconductor product that you intend to use. information (including circuit diagrams and circu it parameters) herein is for example only; it is not guaranteed for volume production. sanyo semiconductor 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 informati on as of june, 2006. specifications and information herein are subject to change without notice.

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