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TA2057N 2002-10-30 1 toshiba bipolar linear integrated circuit silicon monolithic TA2057N am / fm if + fm st det (for digital tuning system) TA2057N is the am / fm if + fm st det system ic, which is designed for dts radios. this ic is included many functions and these can be used for digital tuning system with if counter. features suitable for combination with digital tuning system which has if counter. one terminal type am / fm if count output (auto stop signal) for if counter of digitl tuning system. built ? in mute circuit for if count output. adjustable for if count output sensitivity by external resistance of pin(2) (am), and pin(3) (fm). for adopting ceramic discriminator and ceramic resonator, it is not necessary to adjust the fm quad detector circuit and fm st det vco circuit. built ? in am local oscillator buffer output circuit. built ? in am if buffer output circuit for am stereo. operating supply voltage range (ta = 25c): v cc = 3.5~ 1 4v handle with care to prevent devices from deteriorations by static electricity. weight: 1.2g (typ.)
TA2057N 2002-10-30 2 block diagram
TA2057N 2002-10-30 3 terminal explanation (terminal voltage shows typical value at ta = 25c, v cc = 5v, sw 3 = off, sw 9 = gnd, and non signal test circuit) dc voltage (v) pin no. characteristic internal circuit fm am 1 am rf in 1.95 1.95 2 am s ? sens ? am if count output sensitivity adjust terminal ? bias terminal for am if / det out switch circuit v 2 = gnd am det out (pin(19)) v 2 = vstb am if out (pin(19)) 0.5 (at sw 9 = vstb1.45) r2 = 10k ? 0.5 (at sw 9 = vstb1.45) r2 = 10k ? 3 fm s ? sens ? fm if count output sensitivity adjust terminal 0 r 3 = 10k ? 0 r 3 = 10k ?
TA2057N 2002-10-30 4 dc voltage (v) pin no. characteristic internal circuit fm am 4 am osc 1.95 1.95 5 am osc out 5.0 4.75 6 v cc D 5.0 5.0 7 agc 0.01 0.01 8 gnd D 0 0 9 if out / req ? if count output terminal ? if count output / fm st det mute circuit control terminal v 9 = v cc on v 9 = open off D D
TA2057N 2002-10-30 5 dc voltage (v) pin no. characteristic internal circuit fm am 10 tun led D D 11 st led D D 12 r out 1.4 1.4 13 l out 1.4 1.4 14 vco 4.3 4.3 15 lpf2 ? lpf terminal for synchronous detector ? vco stop terminal v 15 = gnd vco stop 3.6 3.6
TA2057N 2002-10-30 6 dc voltage (v) pin no. characteristic internal circuit fm am 16 lpf1 ? lpf terminal for phase detector ? bias terminal for am / fm switch circuit v 16 = gnd am v 16 = open fm 3.6 0 17 mpx in 1.4 1.4 18 am det out ? am det / if out v 2 = gnd am det out v 2 = open fm if out 1.44 1.5 (at sw 9 = vstb1.3) 19 fm det out 1.2 1.5
TA2057N 2002-10-30 7 dc voltage (v) pin no. characteristic internal circuit fm am 20 quad 1.1 1.5 21 am if in 1.95 1.95 22 vstb 1.95 1.95 23 mix out 5.0 5.0 24 fm if in 1.95 1.95
TA2057N 2002-10-30 8 application note 1 . how to control the if count output signal (pin(9) output) tun led on off h come on non output v 9 open non output non output mute circuit h on v 9 open off whether or not there is the if count output signal (pin(9) output) is determined by the and of the pin(9) control voltage: v 9 and tuning led on / off switching. in the condition of v 9 : high (active high, v th = 2v (type.) ) tun led: on (v in v l + 2db (type.) ) the if count output signal come out from the pin(9). the signal waveform is fm: rectangular, am: differential wave, and the level is 500mv p p (typ.) mute circuit is action by the pin(9) control voltage: v 9 (at high) in matrix output circuit. 2. how to adjust the if count output sensitivity the if count output sensitivity (search sensitivity) can be adjusted by varying the if amp. gain for fm and varying the mixer gain for am. however, this is only possible at the auto tuning mode (external voltage supplied to pin(9) is at high level). the original gain returns while receiving a broadcast station (supplied voltage to pin(9) is at low level).
TA2057N 2002-10-30 9 the gain loss of fm if amp. (typ.) r 3 0 ? 10k ? 25db 0db the gain loss of am mixer (typ.) r 2 0 ? 10k ? (note) det. output mode 29db 0db if amp. output mode 29db 0db (note): it is necessary to set up the value of r 2 under 20k ? . when the r 2 is over 20k ? , it is feared that the mode can not change.
TA2057N 2002-10-30 10 3. how to control the am if output signal (pin( 1 8) output) pin(18) output signal gnd am det out v 2 vstb am if out 4. am local oscillator buffer output the output impedance of am local oscillator buffer output pin (pin(5) ) is 750 ? (typ.). it is possible to reduce the output level to add the resistance between the pin(5) and v cc line. the signal waveform is the rectangular wave, and the level is 500mv p p . (f osc = 1 .45mhz (typ.) ) the higher local oscillation frequency (f osc ) to be, the lower buff output level to be owing to the load capacity. so, in the case that it is connected to other circuits, take care of the input capacity of these circuits and stray capacity of wire. 5. fm detector circuit for the fm detector circuit, detector coil is able to use instead of ceramic discriminator. recommended circuit and recommended coil are as follows. in this case, please take care that v in (lim.) fall a little. turns test frequency c o (pf) q o 1 2 2 3 1 3 4 6 wire (mm ) ref. 10.7mhz 100 100 D D 12 D 0.12 uew sumida electric co., ltd. 2153 4095 189 or equivalent
TA2057N 2002-10-30 11 6. fm / am switch and forced monaural switch fm / am switchover and stereo / forced monaural switchover are done by pin( 1 6) and pin( 1 5). fm / am switch (pin( 1 6) ) v 1 6 : low (active low, v th = 1 .0v (typ.) am v 1 6 : open fm stereo / forced monaural switch (pin( 1 5) ) v 1 5 : low (active low, v th = 1 .0v (typ.) forced manaural v 1 5 : open stereo
TA2057N 2002-10-30 12 maximum ratings (ta = 25c) characteristic symbol rating unit supply voltage v cc 14 v led current i led 10 ma led voltage v led 14 v power dissipation p d (note) 1200 mw operating temperature t opr 25~75 c storage temperature t stg 55~150 c (note): derated above 25c in the proportion of 9.6mw / c
TA2057N 2002-10-30 13 electrical characteristics unless otherwise specified, ta = 25c, v cc1 = 5v, sw 3 = off, sw 9 = gnd, sw 10 = 1 fm if: f = 10.7mhz, ? f = 22.5khz, f m = 1khz am: f = 1mhz, mod = 30%, f m = 1khz fm st det: f m = 1khz characteristic symbol test cir cuit test condition min. typ. max. unit i cc (fm) 1 fm mode, v in = 0 D 20 26 supply current i cc (am) 1 am mode, v in = 0 D 20 26 ma input limiting voltage v in (lim) 1 3db limiting point 38 43 48 dbv emf recovered output voltage vod 1 v in = 80dbv emf 70 100 140 mv rms signal to noise ratio s / n 1 v in = 80dbv emf D 70 D db total harmonic distortion thd 1 v in = 80dbv emf D 0.2 D % am rejection ratio amr 1 v in = 80dbv emf D 50 D db led on sensitivity v l 1 i l = 1ma 43 48 53 dbv emf if count output voltage v if (fm) 1 sw 3 : on, v in = 80dbv emf 350 500 D mv p p sw 3 : on, sw 1 : 0 ? D 73 D fm if if count output sensitivity if sens (fm) 1 sw 3 : on, sw 1 : 5.1k ? D 62 D dbv emf gain g v 1 v in = 23dbv emf 35 70 105 mv rms recovered output voltage v od 1 v in = 60dbv emf 70 100 140 mv rms signal to noise ratio s / n 1 v in = 60dbv emf D 45 D db total harmonic distortion thd 1 v in = 60dbv emf D 0.5 D % led on sensitivity v l 1 i l = 1ma 19 24 29 dbv emf 1 f osc = 1.45mhz 350 500 D local osc buff output voltage v osc (am) 1 f osc = 27mhz D 500 D mv p p am if output voltage for am stereo v if (st) 1 sw 9 : vstb, mod = 0% v in = 60dbv emf, sw 10 : 2 800 1100 1400 mv p p if count output voltage v if (am) 1 sw 3 : on, v in = 60dbv emf 350 500 D mv p p sw 3 : on, sw 2 : 0 ? D 54 D am if count output sensitivity if sens (am) 1 sw 3 : on, sw 2 : 5.1k ? D 30 D dbv emf
TA2057N 2002-10-30 14 characteristic symbol test cir cuit test condition min. typ. max. unit max. composite input voltage v in max (stereo) 1 l + r = 90%, p = 10% thd = 3%, sw 8 lpf: on D 800 D mv rms f m = 100hz D 45 D f m = 1khz 35 45 D separation sep. 1 l + r = 180mv rms p = 20mv rms sw 8 lpf: on f m = 10khz D 45 D db monaural thd (mono) v in = 200mv rms (mono) D 0.05 D total harmonic distortion stereo thd (st) 1 l + r = 180mv rms p = 20mv rms sw 8 lpf: on D 0.05 D % voltage gain g v (fm st det) 1 v in = 200mv rms (mono) 2 0 2 db channel balance c. b. 1 v in = 200mv rms (mono) 2 0 2 db on v l (on) D 10 18 stereo led sensitivity off v l (off) 1 pilot input 3 8 D mv rms stereo led hystersis v h 1 to led turn off from led turn on D 2 D mv rms capture range c. r. 1 p = 20mv rms D 1.3 D % fm st det signal to noise ratio s / n 1 v in = 200mv rms (mono) D 78 D db
TA2057N 2002-10-30 15 test circuit1 coil data (test condition1) turn coil no. f l (h) c o (pf) q o 1 2 2 3 1 3 4 6 wire (mm ) ref. (coil no.) t 1 am osc 796khz 288 D 115 13 73 D D 0.08 uew (s) 4147 1356 038 (t) a7brs 12552y (m) mj 3273 3 t 2 am ift 455khz D 180 120 D D 180 15 0.06 uew (s) 2150 2162 165 (t) 7mes 11368n (m) mj 3337 (s): sumida electric co., ltd. (t): toko co., ltd. (m): mitsumi electric co., ltd.
TA2057N 2002-10-30 16 test circuit2 coil data (test circuit 2) turn coil no. f l (h) c o (pf) q o 1 2 2 3 1 3 4 6 wire (mm ) ref. (coil no.) t am osc 7.96mhz 1.4 D 84 1 6 7 D 0.08 uew (t) 7pl 1344y (t): toko co., ltd.
TA2057N 2002-10-30 17 package dimensions weight: 1.2g (typ.)
TA2057N 2002-10-30 18 toshiba is continually working to improve the quality and reliability of its products. nevertheless, semiconductor devices in general can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical stress. it is the responsibility of the buyer, when utilizing toshiba products, to comply with the standards of safety in making a safe design for the entire system, and to avoid situations in which a malfunction or failure of such toshiba products could cause loss of human life, bodily injury or damage to property. in developing your designs, please ensure that toshiba products are used within specified operating ranges as set forth in the most recent toshiba products specifications. also, please keep in mind the precautions and conditions set forth in the ?handling guide for semiconductor devices,? or ?toshiba semiconductor reliability handbook? etc.. the toshiba products listed in this document are intended for usage in general electronics applications (computer, personal equipment, office equipment, measuring equipment, industrial robotics, domestic appliances, etc.). these toshiba products are neither intended nor warranted for usage in equipment that requires extraordinarily high quality and/or reliability or a malfunction or failure of which may cause loss of human life or bodily injury (?unintended usage?). unintended usage include atomic energy control instruments, airplane or spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments, medical instruments, all types of safety devices, etc.. unintended usage of toshiba products listed in this document shall be made at the customer?s own risk. the products described in this document are subject to the foreign exchange and foreign trade laws. the information contained herein is presented only as a guide for the applications of our products. no responsibility is assumed by toshiba corporation for any infringements of intellectual property or other rights of the third parties which may result from its use. no license is granted by implication or otherwise under any intellectual property or other rights of toshiba corporation or others. the information contained herein is subject to change without notice. 000707eb a restrictions on product use

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