Standard ICs Dual operational amplifier with switch, for audio use (2 inputs / 1 output × 2) BA3129 / BA3129F The BA3129 and BA3129F contain two circuits with operational amplifiers configured of two differential input circuits, an output circuit, and a switch circuit. The two differential input circuits are separate, enabling independent settings to be entered for the amplifier gain and frequency characteristic. Applications •Audio amplifiers and other electronic circuits •1)Features Can drive both dual or single power supplies. 3) Low noise. (Vn = 2µVrms typ.: FLAT) 4) Little switching noise. 5) Internal phase compensation. 2) High gain and low distortion. (Gv = 110dB, THD = 0.0015%) •Block diagram + IN1A 1 14 + IN2A – IN1A 2 13 – IN2A + IN1B 3 12 + IN2B – IN1B 4 11 – IN2B OUT1 5 10 OUT2 SW1 6 9 SW2 VEE 7 8 VCC – + – + + – + – 1 Standard ICs BA3129 / BA3129F •Absolute maximum ratings (Ta = 25°C) Parameter Symbol Applied voltage Limits ± 18 VCC Power dissipation BA3129 BA3129F Unit V 1100∗1 Pd mW 450∗2 Operating temperature Topr – 20 ~ + 75 °C Storage temperature Tstg – 55 ~ + 125 °C Differential input voltage Vid ± VCC Vi – VCC ~ VCC V IoMax. ± 50 mA Common-mode input voltage Load current V ∗1 Reduced by 11mW for each increase in Ta of 1°C over 25°C. ∗2 Reduced by 4.5mW for each increase in Ta of 1°C over 25°C. •Recommended operating conditions (Ta = 25°C) Parameter Operating power supply voltage Symbol Limits Unit Single power supply VCC 5 ~ 32 V Dual power supplies VCC, VEE ± 2.5 ~ ± 16 V RL 2 k Min. Ω Load conditions •Electrical characteristics (unless otherwise noted, Ta = 25°C, V CC Parameter Quiescent circuit current = 15V, VEE = – 15V) Symbol Min. Typ. Max. Unit IQ — 4.6 8.0 mA VIN = 0, RL = ∞ SW pin open RS ⬉ 10kΩ Input offset voltage Vio — 0.5 5.0 mV Input offset current Iio — 5 200 nA Input bias current High-amplitude voltage gain Ib — 50 500 nA Avol 86 110 — dB RL ⬉ 2kΩ, Vo = ± 10V ± 12 ± 14 — V 70 90 — dB Common-mode input voltage Vicm CMRR Power supply voltage rejection ratio PSRR Slew rate Gain band width product VOH / VOL SR — RS ⬉ 10kΩ 76 90 — dB RS ⬉ 10kΩ ± 12 ± 14 — V RL ⭌ 10kΩ ± 10 ± 13 — V — 2.4 — V / µs RL ⭌ 2kΩ GV = 0dB, RL ⬉ 2kΩ GBW — 6.5 — MHz Vn — 2.0 — µVrms Crosstalk between A-B CTA-B — 85 — dB Total harmonic distortion THD — 0.0015 — % f = 1kHz, Vo = 5Vrms CS — 120 — dB f = 1kHz, input conversion Input conversion noise voltage Channel separation ∗1 Because the first stage is configured with a PNP transistor, input bias current is from the IC. 䊊 Not designed for radiation resistance. 2 — ∗1 Common-mode rejection ratio Maximum output voltage Conditions f = 10kHz RL = 2kΩ. B. P. F = 20 ~ 30kHz f = 1kHz Standard ICs BA3129 / BA3129F notes •(1)Operation Using SW pins 8 The Pin 6 and Pin 9 SW pins control switching of the dual-system differential input amplifier. When the current flowing from the SW pins is detected, the differential input amplifier is switched. If no current is flowing from the SW pins, the A amplifier is activated, and if current of 20µA or higher is flowing, the B amplifier is activated. The pin voltage is V = VCC – (5 × 103 + 10 × 103) I – 0.7. Thus, R1 and R2 are set so that when the switch is off, the switching current is 1µA or lower, and when the switch is on, the switching current is 20µA or higher. VCC 5kΩ R1 A 6/9 10kΩ 1 R2 SW Circuit SW OFF: A-amp function ON : B-amp function Fig.1 •Application example 0.22µ 0.22µ 1 IN1A IN2A 14 47k 47k 2.2k 2.2k 2 13 3 12 22k 22k 0.22µ 0.22µ IN1B IN2B 47k 47k 4 2.2k BA3129 BA3129F 11 2.2k 1µ 1µ 5 OUT1 10 5.6k 6 + 12k 16µ OUT2 5.6k 9 12k + 12k 7 16µ 12k 8 100k VCC = 12V SW OFF: A amp SW ON : B amp A amp: GV = 20dB B amp: GV = 10dB 47k 0.22µ SW Fig.2 When the switch is off, Pins 6 and 9 are open, resulting in high impedance. To guard against induction noise and other adverse effects, we recommend using a pullup resistance. 3 Standard ICs BA3129 / BA3129F •External dimensions (Units: mm) BA3129 BA3129F 19.4 ± 0.3 0.5 ± 0.1 0° ~ 15° 8 1 7 1.27 0.15 ± 0.1 4.4 ± 0.2 14 0.4 ± 0.1 0.3Min. 0.15 DIP14 4 6.2 ± 0.3 0.3 ± 0.1 2.54 1.5 ± 0.1 7.62 0.11 7 0.51Min. 4.25 ± 0.3 1 3.2 ± 0.2 8.7 ± 0.2 8 6.5 ± 0.3 14 SOP14