TA2123AF

TA2123AF TOSHIBA Bipolar Integrated Circuit Silicon Monolithic TA2123AF 1.5V Stereo Headphone Amplifier The TA2123AF is the system amplifier IC which is developed for playback stereo headphone equipments. It is built in dual auto−reverse preamplifiers, dual power amplifiers with bass / treble boost function, AMS (automatic music sensor) function, beep function, AGC for power amplifier etc. Features · Power amplifier stage · In case of output coupling type, the supply current decreases. (built−in center amplifier switch) · Built−in bass boost function · Built−in treble boost function · Built−in power amplifier muting function · Built−in input terminal for beep signal · Built−in input capacitor for reducing buzz noise · GV = 24dB (typ.) · Built−in AGC circuit (in case of boost mode, this circuit operates.) · Low supply current (VCC = 1.3V, f = 1kHz, RL = 32Ω, Ta = 25°C, typ.) No Signal Output coupling type OCL type 1.5mA 2.2mA 0.1mW × 2 3.0mA 4.9mA 0.5mW × 2 5.0mA 8.6mA Weight: 0.17g (typ.) · Preamplifier stage · Auto-reverse compatible · Built-in input capacitor for reducing buzz noise · Input coupling condensor-less · Built-in metal mode drivers · Preamplifier muting function · · · · Built-in ripple filter circuit Built-in AMS (automatic music sensor) function (mixer amplifier and level comparator) Built-in power switch Operating supply voltage range (Ta = 25°C) VCC (opr) = 0.95~2.2V 1 2002-10-30 TA2123AF Block Diagram OUTC VREF OUT BST OUT DET + - PW INA AGC IN...