ics for telephone 1 publication date: february 2001 sde00002ceb an6123ms speech network ic with alc overview the an6123ms is an alc ic for level control of audio signal (300 hz to 3 khz). adopting a mini 5-pin package, mounting on a small area is possible. features ? wide supply voltage operation range of v cc = 2.4 v to 6.0 v ? small current consumption of i cc = 500 a ? reduction of a bad effect by the external noise thanks to a package for a rear side mounting. applications ? cordless telephone, pdc, phs telephone block diagram mini-5d unit: mm 5 1 4 3 2 det g m v cc output gnd det input 2.80 +0.20 ?0.30 1.50 0.650.15 0.650.15 1 5 4 3 2 1.450.10 0.95 0.95 1.900.10 0.80 +0.25 ?0.05 0.30 +0.10 ?0.05 0.16 0 to 0.10 +0.10 ?0.06 2.90 +0.20 ?0.05 1.10 +0.20 ?0.10 0.400.20 0.1 to 0.30 maintenance/ discontinued maintenance/discontinued includes following four product lifecycle stage. planed maintenance type maintenance type planed discontinued typed discontinued type please visit following url about latest information. http://www.semicon.panasonic.co.jp/en/
an6123ms 2 sde00002ceb pin descriptions pin no. description 1v cc supply voltage pin 2 det detection pin 3 input signal input pin 4 gnd grounding pin 5 output signal output pin parameter symbol conditions min typ max unit operating current i cc without signal input ? 450 900 a electrical characteristics at v cc = 3.0 v, f = 1 khz, t a = 25 c absolute maximum ratings parameter symbol rating unit supply voltage v cc 6.5 v supply current i cc 3.0 ma power dissipation p d 19.5 mw operating ambient temperature * t opr ? 20 to + 75 c storage temperature * t stg ? 55 to + 125 c note) * : except for the operating ambient temperature and storage temperature, all ratings are for t a = 25 c. recommended operating range parameter symbol range unit supply voltage v cc 2.4 to 6.0 v parameter symbol conditions min typ max unit voltage gain g v v in = ?40 dbm 22 24 26 db output level v o v in = ? 10 dbm ? 9.5 ? 7.5 ? 5.5 dbm alc control range ? alc output level varying amount ? 1.5 ? 1.5 db at v in = ? 25 dbm, v in = 0 dbm total harmonic distortion factor thd at v in = ? 10 dbm ?1 3 % output noise voltage v no terminated by ccit filter input 2 k ? ?? 70 ? 60 dbm input impedance z in pin 3 input impedance 15 30 45 k ? output impedance z out pin 5 output impedance 200 400 600 ? ? design reference data note) the characteristics listed below are theoretical values based on the ic design and are not guaranteed. maintenance/ discontinued maintenance/discontinued includes following four product lifecycle stage. planed maintenance type maintenance type planed discontinued typed discontinued type please visit following url about latest information. http://www.semicon.panasonic.co.jp/en/
an6123ms 3 sde00002ceb application notes 1. i/o characteristics and distortion the i/o characteristics in the circuit shown on the left can be referred to in the graph below. also note that if the c in the circuit is lowered, the distortion characteristics will become worse (graph 2). gnd 10 k ? 2 200 pf 0.33 f 10 f c 1 m ? 3.0 v signal output signal input (input frequency = 1 khz) 4 3 2 5 1 an6123ms graph 1. i/o characteristics and distortion (when c = 10 f) ? 50 0 2 4 6 8 10 12 ? 70 ? 60 ? 50 ? 40 ? 30 ? 20 ? 10 0 10 ? 45 ? 40 ? 35 ? 30 ? 25 ? 20 ? 15 ? 10 ? 5 0 output level (dbm) distortion ( % ) input level (dbm) output level distortion graph 2. distortion characteristics when c is variable 0 ? 40 ? 35 ? 30 ? 25 ? 20 ? 15 ? 10 ? 5 0510 1 2 4 3 5 6 7 8 9 10 11 12 13 distortion ( % ) input lebve; (dbm) c = 4.7 f c = 10 f c = 1.0 f c = 2.2 f maintenance/ discontinued maintenance/discontinued includes following four product lifecycle stage. planed maintenance type maintenance type planed discontinued typed discontinued type please visit following url about latest information. http://www.semicon.panasonic.co.jp/en/
an6123ms 4 sde00002ceb application notes (continued) 2. input level adjustment for maximum output you can adjust r in the left circuit diagram to find the operation point for a maximum out- put level. for example, since the input level for a maximum output is ? 30 dbm when r is open and the attenuation in the input stage is 20 log (3k/6.3k) = ? 6.4 db when r is 3 k ? . this means a total gain loss is ? 6.4 db as compared with open mode, hence the input level to get the maximum output is ? 23.6 dbm. likewise, the attenuation is 12.7 db for r = 1 k ? and the desired input level becomes 17.3 dbm. i/o characteristics gnd 10 k ? 2 200 pf 0.33 f 10 f 10 f 1m ? 3.0 v signal input (1 khz) 4 3 2 5 1 an6123ms r 3.3 k ? signal output ? 60 ? 70 ? 65 ? 60 ? 55 ? 50 ? 45 ? 40 ? 35 ? 30 ? 25 ? 20 ? 15 ? 10 ? 50 ? 55 ? 50 ? 40 ? 45 ? 35 ? 30 ? 25 ? 20 ? 15 ? 10 ? 5 0 output level (dbm) input level (dbm) r = 3 k ? r = open r = 1 k ? 3. output level adjustment for a maximum output the maximum output level can be adjusted by r in the left circuit diagram. since the maximum output is ? 7.5 dbm when r is open, it is 20 log (20k/30k) = ? 3.5 dbm at r = 20 k ? . it is an attenuated value of by 3.4 db against open mode. therefore, the maxi- mum output becomes ? 11 dbm. likewise, for r = 10 k ? , attenuation is 6 db and the maximum output becomes ? 13.5 dbm. i/o characteristics ? 35 ? 30 ? 25 ? 20 ? 15 ? 10 ? 5 0 ? 50 ? 45 ? 40 ? 35 ? 30 ? 25 ? 20 ? 15 ? 10 output level (dbm) input level (dbm) r = 10 k ? r = open r = 20 k ? gnd 10 k ? 2 200 pf 0.33 f 10 f 10 f 1m ? 3.0 v signal output signal input (1 khz) 4 3 2 5 1 an6123ms r 3.3 k ? maintenance/ discontinued maintenance/discontinued includes following four product lifecycle stage. planed maintenance type maintenance type planed discontinued typed discontinued type please visit following url about latest information. http://www.semicon.panasonic.co.jp/en/
an6123ms 5 sde00002ceb application notes (continued) 4. frequency characteristics the an6123ms itself has an almost flat fre- quency characteristic in the audio frequency band. the high-band frequency is set with r and c shown in the left circuit. the cut-off frequency f c at r = 10 k ? and c = 2 200 pf, that is the frequency at which the frequency characteristic deteriorates by 3 db, is f c = 1/2 cr = 7.2 khz. at r = 10 k ? and c = 1 000 pf, it is 16 khz. (refer to the graph.) frequency characteristics gnd 10 k ? 0.33 f 10 f 10 f 1 m ? 3.0 v 4 3 2 5 1 an6123ms r c signal output signal input input frequency (hz) gain (db) 100 1k 10k 100k ? 10 ? 8 ? 6 ? 4 ? 2 0 2 4 6 8 10 for c = 1 000 pf for c = 2 200 pf input signal level: ? 10 dbm application circuit example v cc gnd 10 k ? 3.3 k ? 2 200 pf 0.33 f 10 f 10 f 1 m ? 2.4 v to 6.0 v g = 30 db signal output 0.9 v[p-p] noise = ? 70 dbm distortion = 1 % signal input (300 hz to 3 khz) r 5 1 4 3 2 det g m maintenance/ discontinued maintenance/discontinued includes following four product lifecycle stage. planed maintenance type maintenance type planed discontinued typed discontinued type please visit following url about latest information. http://www.semicon.panasonic.co.jp/en/
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