TCA740A

TCA740A_V01 PHILIPS | Alldatasheet

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ON” D.C. TREBLE AND BASS STEREO CONTROL CIRCUIT The GCA740A is a monolithic integrated circuit for controlling treble and bass in stereo amplifiers by means of a d.c. voltage. Features: © two double potentiometer circuits © feedback control © internal amplifier © high-ohmic signal inputs © converter for the control voltages @ low-ohmic and short-circuit protected signal outputs QUICK REFERENCE DATA ‘Supply voltage (pin 8) Vp typ. 15 Vv Supply current (pin 8) Ip typ. 35 mA Bass boost and cut at 40 Hz (ref. 1 kHz) typ. +16 dB Treble boost and cut at 16 kHz (ref. 1 kHz) typ. 216 dB input/output voltage at dyot = 0,7% (r.m.s. value) Vi, olrms) typ. 2Vv Total distortion at Vo(rms) =1V:linear frequency response dot typ. 01% Channel separation a typ. 70 dB Output signal plus noise voltage (r.m.s. value) Vno (rms) typ. 45 uV Frequency response (—1 dB) f 20 Hz to 20 kHz Treble/bass control voltage range : VizweiVa18 «1,8 1095 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). (7) February 1980 te orem —_

Voi Ry Voi Rt, from pin 11 (left) (right) from pin 13, +Ve aaurdt dLrowe vowed drooue 12k = trom pin 8 & 12k — 4 a l 68 | (| 22 < Kat | bass | Jksr veusy) tH | re (| a — — a a os iH contRow internat] | >X7 XY CIRCUIT \\7 1 \\7 SUPPLY os L\\\\ " LS, as vie [=—" Lf } TCA740A rar a a | Hq Vro} Ioontron|} | 907 aN CIRCUIT INVA INA i — es | es ee i > — . 4°: | treble (| 2 | goxn | Ke KOT son 1.BnF 4 fromping 1.8 0F 18 39 «| (| 39K sexo [|soxe = tye te => + PAR ViiRg + 278081 => ere wign 7 1 (2) 0,31 Vp + 1,4 Vag; V2 = 5,6 V Fig, 1 Block diagram with external circuitry,

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D.C. treble and bass stereo control circuit TCA740A RATINGS Limiting values in accordance with the Absolute Maximum System (IEC 134) Supply voltage (pin 8) Vp max. BV Control voltages (pins 4 and 12) Va16 max. 12Vv —V416 max. 5V V12-16 max. 12V Vi216 max. BV 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; Tam = 25 °C; measured in Fig.1; in position ‘linear’ (V4.16 = V12-16 = 5.6 V): Rg = 602; Ry = 5,6 k®; f= 1 kHz; unless otherwise specified Supply voltage range (pin 8) Vp 13,5 t0 16,5 V Supply current (pin 8) Ip typ. 34 mA 2510.45 mA Signal processing Voltage gain at linear frequency response Gy typ. 0 oB Frequency response (—1 dB) f 20 Hz to 20 kHz Maximum gain variation at f= 1 kHz at maximum bass/treble boost or cut AGy < £15 dB as boost a 40 Hz (ref. 1 kHz) > 15 3B 416 = 9. typ. 16 dB Bas cut ago He (ref. 1 kHz) + 15 4B 4-16 © typ. 16 dB Tele boost a 1s kHz (ref. 1 kHz) > 15 aB 12:16 = 9 typ. 16 cB Teele cut at 16 kHz (ref. 1 kHz) > 18 a8 12-16 = typ. 16 oB Total distortion = Voirms) = 100 mV; f = 1 kHz dtot typ. 0,03 % = Vo(rms) 7 100 mV; f = 40 Hz to 16 kHz drot typ. 0,1 % = =1Vif- typ. 0,07 % Vo(rms) = 1V: f= 1 kHz rot < 0.2% Vo(rms) = 1 Vi f= 40 Hz to 16 kHz dtot typ. 02% Input/output voltage at drot = 0.7 % (r.m.s. value) Vitrms)=Volrms) >, 18 Vv typ. 2Vv Output signal plus noise voltage (r.m.s. value) #= 20 Hz to 20 kHz Vno(rms) typ. 40 pV Output noise voltage; weighted conform J typ. 90 pV DIN45405; peak value Vno(m) 2 160 nV / 3 3 February 1980 2 wood —

CHARACTERISTICS (continued) Channel separation f=1kHz a typ. 72 dB {= 250 Hz to 12,5 kHz a typ. 68 dB . > 50 dB f= 40 Hz to 16 kHz a typ. 58 dB Control voltages Recommended control voltage range > ov treble/bass V4-16=V12-16 2t09,2 V < 0,66 Vp V typ. 56 V Control voltage at linear frequency response V4.16 =V12-16 541058 V {0,31 Vpto 1,4Vge) V Quiescent input current = = = typ. 6 HA V4.16 = V12.16 =2to9,2V lg=t12 x 28 uA Input resistance (pins 4 and 12) V4-16 = V12-16 = 5.6 V Ria2 typ. 800 k2 Amplifier characteristics Quiescent input currents; Vj = 4,6 V ° typ. 0,6 HA (pins 1, 2, 6, 7, 9, 10, 14 and 15) {yslailg:l7:lg:Ho:laitis BY 2 WA Input resistance (pins 1,2,6,7,9,10,14 and 15) Ri 1:26;7:9:10;14;15 > 1 M2 Internal emitter resistance at outputs R316; 85-16; 811-16: R13-16 tye. 2kQ Output resistance (pins 3,5,11 and 13) Ro 3.5:11;13-16 typ. 102 . G > 40 dB Maximum gain; no load vp. 43 dB D.C. output voltages typ. 46V V4.16= 12-16 = 5.6 V (pins 3,5,11 and 13) 3.46; V5-167 V11-16; 13-16 43t04,9 V (66 Vee) V Lm February 1980 i 4 y = oum —

D.C. treble and bass stereo control circuit TCA740A

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D.C, treble and bass stereo control circuit TCA740A APPLICATION INFORMATION + a0xn er 330 sae 10uF (avy o BF 2240 a9.0} v toe HHS 4 ane 2247 fet) ep ee ees v sett = “a Ag<6on Som 1 5 Hi n 3 \\ iS TCA740A i“ Sine Gacur Es 1 ? ] | a eo ul | 4 «ne [Fag [Po 7 | tein) 4} — 4 12nn 2H see | agetou ter Tiare ana] | oma FES ype orn |+-—- > (avy we ti sae | saan tom Ve 39K 180k | oss | en L| | Beet roast (} (| ane es tae : wot Die eT ye (1) RC network for limiting treble boost (linear: f_3 gg = 100 kHz). rrr (2) Capacitors are intended for ‘suppression of the noise when adjusting the mechanical potentiometers. Fig. 6 Application example of TCA740A used for treble and bass control. — i ; } February 1980 = ne oa a

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