BA3131FS

BA3131FS Standard ICs Dual operational amplifier with switch, for audio use (3 inputs × 1 output × 2) BA3131FS The BA3131FS contains two built-in circuits with operational amplifiers configured of three differential input circuits, an output circuit, and a switch circuit. The three differential input circuits are separate, enabling independent settings to be entered for the gain and frequency characteristics. !Applications Car stereos, audio amplifiers and other electronic circuits !Features 1) High gain and low distortion. (Gv = 110dB, THD = 0.0015% typ.) 2) Low noise. (Vn = 2µVrms typ.) 3) Switching circuit can be directly coupled to microcomputer port. 4) Small switching noise. 5) Equipped with 1 / 2 Vcc output circuit for single power supply. !Block diagram + IN1A 1 20 + IN2A - IN1A 2 – + +– 19 - IN2A + IN1B 3 18 + IN2B - IN1B 4 – + +– 17 - IN2B + IN1C 5 16 + IN2C - IN1C 6 – + +– 15 - IN2C OUT1 7 3 3 14 OUT2 SW1 8 – + 13 Vref OUT SW2 9 12 1 / 2 VCC GND 10 R R 11 VCC BA3131FS Standard ICs !Absolute maximum ratings (Ta=25°C) Parameter Power supply voltage Power dissipation Operating temperature Storage temperature Common-mode input voltage Differential input voltage Load current Symbol VCC Pd Topr Tstg Vi Vid IoMax. Limits 18.0 750∗ – 40 ~ + 85 – 55 ~ + 125 3 ~ VCC VCC ± 50.0 Unit V mW ˚C ˚C V V mA ∗ Reduced by 7.5mW for each increase in Ta of 1˚C over 25˚C. (When mounted on a glass epoxy board (90mm × 50mm × 1.6t)) !Recommended opera...