TCA730A ETC | Alldatasheet
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D.C. VOLUME AND BALANCE STEREO CONTROL CIRCUIT The TCA730A is a monolithic integrated circuit for controlling volume and balance in stereo amplifiers by means of a d.c. voltage. Features: © physiological volume control ®@ balance contro! @ internal! amplifier © high-ohmic signals inputs @ internal supply voltage stabilization © converter for the control voltage QUICK REFERENCE DATA Supply voltage (pin 8) Vp typ. 15 V Supply current (pin 8) Ip typ. 35 mA Input voltage range (r.m.s. value) Vitems) 0,110 1,7 V Nominal input voltage; m= 1 (rms. value) Vitems) YP. «05 V Input resistance Ri typ. 250 k2 Output voltage at nominal output power (r.m.s. value) Vo(rms) tye. lv Volume control range Gy +20 to —80 dB Channel balance AGy typ. 1B Balance control range Gy +5 to—7 dB Total distortion at Vo(rms) = 1V drot typ. 0,1. % Channel separation a typ. 55 dB Signa!-to-noise ratio S/N typ. 67 dB Frequency response (—1 dB) 20 Hz to 20 kHz Volume control voltage range Vi345 21095 V Balance control voltage range V12-15 2,5 109,0 V Supply voltage range (pin 8) Vp 13,5 to 16,5 V = Ambient temperature range Tamb —30 to +80 °C : PACKAGE OUTLINE 16-lead DIL; plastic (SOT-38). February 1980 rd uF a ro .
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D.C. volume and balance stereo control circuit TCA730A RATINGS Limiting values in accordance with the Absolute Maximum System (IEC 134) Supply voltage (pin 8) Vp max. 18 V Vaa. min, OV Input voltages VirtsiMIG15 vp v : min, 5 V Control voltages Vi21siViais = Dy Total power dissipation Prot max. 900 mW ‘Storage temperature range Tstg —55 to +150 °C Operating ambient temperature range Tamb --~30 to #80 °C CHARACTERISTICS Vp = 15 V; Tamb = 25 °C; measured in Fig. 1; balance control in mid-position (V42.19 = 0); physiology switch off; f= 1 kHz; Rg = 22 k®; Ry = 5,6 k®; unless otherwise specified. Supply voltage range (pin 8) Vp 13,5 to 16,5 V typ. 35 mA Supply current Ip 5B 1043 mA Control range Voltage gain range Gy 010.20 4B . . typ. 20 dB Voltage gain at V13-15 = 9,5 V (0,63 Vp) Gy ‘Btos ae Voltage attenuation range Gy Oto 80 dB . > -75 dB Voltage attenuation at V13.15 = 3 V (0,2 Vp) Gy fp. 280 3B Balance control range at Gy = —10 dB +5to-7 4B Control inputs Recommended control voltage range volume 13-45 21095 V balance Ving 2,5 10 9,0 V Control voltage for Gy = —10 dB; Vq2.49= 0 Vis15 6,7 t07,1 VP Control voltage for balance 0 dB; V13.15 = 6.9 V Vi240 typ. 0+ 0.2 V typ. 5,9. V : Internal supply voltage (0,36 Vp + 0,65 Vgc) viors ey 84 V : Output resistance (pin 10) Roo typ. = 3 KD : Control current - typ, 15 uA volume (V43.15 = 6,9 V) 443 SiN = typ, BHA balance (V42.15 = 5,9 V) 2 < 25 uA Input resistance pin 13 (volume) Ri13 typ. 600 k2 pin 12 (balance) Rit2 typ. 600 k2 * Typical value 6,9 V. Fe 1 Y ( 4 ‘ebruary 1980 & oe ee —
CHARACTERISTICS (continued) Signal processing Frequency response (—1 dB) f 20 Hz to 20 kHz Input resistance; Ry1.10 = 814-10 = 270 k® (pins 11; 14) Ri1114 typ. 250 kK Output resistance (pins 3; 5) Ros typ. «10 Maximum input voltage; Vo(rms) <1 V: dtot = 0.7 % (ram.s. value) > 13 itrms) typ, 1.7 V Maximum output voltage; V; <1V:dtor = 0.7% (r.m.s. value) V, > 18V 3 Vifems) <1 Vi dtor = olrms) typ, 2.0. V Total distortion : typ. 0,07 % Vo(rms) = 1 V; Gy = maximum drot nD Votrms) = 1 V: Vi (rms) = 1V Stot typ. 0,2 % 7 = 50 mV; Vi(rms) = 150 mV 4 typ. 0,03 % ‘o(rms) i(rms) tot < 01% Vo(rms) = 50 mV; Vi(rms) = 1V dtot typ. 0,2 % Output noise voltage; f = 20 Hz to 20 kHz signal plus noise voltage (r.m.s. value) Gy = -60 dB Vno(rms) tye. 6 2 Gy=-10dB Vno(rms) typ. 15 wV Gy = maximum (#20 dB) Vno(rms) typ. 100 »V noise voltage; weighted conform DIN45405 (peak value) Gy = -60d8 Vnotm) typ. «15: a =-1 typ. 35 wV Gy=—10dB Vanotm) — < 80 nV Gy = maximum (+20 dB) v, typ. 230 uv Vv noim) 350 Channel separation; Gy = +20 dB; Vj = Vo <1 > 52 dB | f= 250 Hz to 12,5 kHz @ op. 53 68 . > 46 dB = f= 40 Hz to 16 kHz @ yp. 80 dB = Channel balance = Gy = + 15 to 50 dB AGy ye 3 3 Gy <50 dB AGy typ. 2: dB & February 1980 | | we
D.C. volume and balance stereo control circuit TCA730A Amplifier characteristics Input resistance (pins 11 and 14) Rivaj14 > 3 MQ D.C. output voltages (0,35 Vp — 1,35 Vge) 3.15) V16-15 typ. 4,2V (6,6 Vee) V3.15; V16-15 typ, 46 V Quiescent input currents (pins 1,2,6,7,11.14) ys tas tgs ty: Mas ya ye 08 ue Input resistance (pins 1,2,6 and 7) of physiology; without external circuitry Rit 2:6:7 > ima Internal load resistance at outputs (pins 3,5,9,16) R3.15; R5.15; Rg-15;R10-15 typ. 2 ka Maxi n load G 69.9: Ge.g: G > 40 dB laximum gain; no loa 3-1; 63.2; 65.6; 5.7 ‘yp. 43 dB 420 _ 7270986 a a | | oy Fe) we) -—) | OT a o- LI Oe a | | ae a a er | EN UTS -290 - RT PANT TA eee) a SS [ASSIST er PT PAI eee Poo KR RHE TE - [CSP OSS ao 40 sa = oH a SS | a a = PENSE pe | = Pp err iti TT TTT = - ee = 60 = 10 10? 103 104 f(z) 108 Fig. 2 Frequency response volume control with physiology. February 1980 * (2s a | Ww ~
OCT Ta) ESE CeCe reer e rer 6, See yO (aa) COO SeenEuaeesenuey 4enn Core Corry Hea o CER eee SESS See ees IPSeees| Seen eeneeenC sEeeeEe Sees eeeeeee7 eeeeeee Ee Coe A Ke CCCerere ry errr HEE aH — ao PEE Fig. 3 Volume control curves; without Coo physiology; balance = 0; V 12.19 = 0. CoCo — Gy tot Gy 511! 6y3-14 HESS EEE viiGetetd Sonne er Cees Sv9.11/ Sv 16-14 Ceccrer yer Ha Cece eee S000. Be Cee sees —so0 COCA) ® S Vig-ig(v) 10 440 2278953 JSSReeeeeeeenen HEE +18V Ke Goro PL COCO vtot [/—++- -=F (aa) COO SSSR S Reese eee ee Eee 7,5k2 16k2 COCO era
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CoCo Too (lin) —_— Cee on Yo = Co — k = YAS , — ao HEA 7 7 1278946 cae SSeS ee Aer ee Say Oo Sees Su abcesaseersssests Cope eo Fig. 4 Volume adjustment curve; balance = 0; Picestsessieisessiss aa we co is —so Co ed) 0 05 o/0 max 1 aS February 1980 | \\ Lv oom —
D.C. volume and balance stereo control circuit TCA730A 20 1270088 Seeeae CTT [J | = ac, l Pit | (48) TT [| [I Py TT bet PY rr er “10 See eee EE EEGERERRGERGEn | | TTP Tey a paee ut Pet RSS ear aaannuee Sates. a8 .>>— eee ol Pi TFesee rr CTT Tee SSE Pity peer Ty Ty a EY. pi [| erry | [Try me tf La an [TN ie a Cty Gy 3-14 -10 Senay eeenecezseetservaszraasr’ speveerecferassrsafeti sce oe EEE peeeeeeeee 28 8 75 Via-15 (Vi 10 Fig. 5 Balance control curves; Gy tot = 10 dB (V 13.15 = 6,9 V); for balance = 0. 420 rzr0087.1 He TE -ER E-R A 4 acy- LTT TTT TTT rr ry Tr wee EEE EEE EEE Cree = co 5 : [|] SuSeSeSSSGnR—<GenEeeeeeee PTT NEE CERES CaEEEnnne Seseeseeeeesens-Ocaeeeee ° |_| Pees =e aa A See +P eet HALE HEA ee [|] PPP Pry ype -oL- TTT TTT Tr reer He | bee | [| HERE [TTT | PPP Pry ty yyy wie of HEE ity | -oL LETTE TPP Try ree eee —100 -50 0 Gytor (48) +50 Fig. 6 Balance controt range; V72-15 = 2,5 to 9,0 V. rv ——
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APPLICATION INFORMATION (continued) arf 22K = 00a oof wr Me woe avs Poo Ptr 9 Sloan - 5.6K 22Kst ‘ —— SRS ro typ 9 res vp I fi T] se ' A a yon i vite) fy os J TeA730a Fo 279 ~ vw Since | : owed vOOTeAL ve T wong (| : Mi Oar i} “oo |S Ly Re aa 1 4 T at ae te 7 7 7 | z seat 2 “Ysa Tas rose av) | 100K . Me agan 19 4 your | Ry >Seas ES pase ” volume cont! | oetance contrat -—— ah [}rzen = (1) €13.15 = 12-15 = 1 HF are intended for suppression of the noise when adjusting the mechanical = potentiometers. (2) For rejecting noise, caused by switching on or off, corresponding muting switches can be used before or in the output power stage. Fig, 14 Application example of TCA730A used for volume and balance control. x February 1980 | \\ 0 om _