TA2145AF Datasheet | Toshiba

TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic 3 V Stereo Headphone Amplifier (3 V USE) The TA2145AF is developed for play-back stereo headphone equipments (3 V USE). It is built in dual preamplifiers, dual OCL power amplifiers, motor governor, DC volume control and preamplifier on/off switch etc. Features - Built-in preamplifier Input coupling condenser-less Built-in input capacitor for reducing buzz noise Low noise: Vni = 1.2 µVrms (typ.) Preamplifier on/off switch. - Built-in power amplifier OCL (Output condenser-less) Voltage gain: GV = 31 d B (typ.) - - - - Built-in motor governor (Current proportion type) Built-in DC volume control function ATT = 82d B (Ta = 25°C, typ.) Built-in bass boost function Low supply current (VCC = 3 V, f = 1 k Hz, PRE OUT = 100 m Vrms, Ta = 25°C, typ.) - Quiescent supply current PRE + PW: ICCQ = 8.5 m A GVN: ICC = 2.5 m A - 0.1 m W × 2 ch output ICC1 = 9.8 m A (RL = 32 Ω) ICC2 = 10.5 m A (RL = 16 Ω) - 0.5 m W × 2 ch output ICC3 = 14.0 m A (RL = 32 Ω) ICC4 = 16.5 m A (RL = 16 Ω) - Operating supply voltage range (Ta = 25°C) VCC (opr) = 1.8~3.6 V GVN VCC (opr) = 2.1~3.6 V (Motor voltage = 1.8 V) Weight: 0.32 g (typ.) 2002-04-19 Block Diagram M PRE: OFF PRE OUTB PW INB RF IN PRE SW GVN VCC GVN CTL GVN OUT 13 VREF Rt RIPPLE FILTER PREB PRE SW VOL. VREF VOL. PW B PREA PW A PW C VOL. CONTROL 4 5 6 7 8 9 10 OUTC PW INC 11 12 PRE GND PRE OUTA PW...