BA3575FS

Audio ICs Low-current audio headphone driver BA3575FS The BA3575FS is a headphone driver with an AVC circuit that keeps the output below a fixed level. It features low current consumption, and low output noise, and is ideal for use in portable digital audio equipment. FApplications Portable CD players FFeatures 1) Low current consumption (when VCC = 2.4 V, the quiescent current is 4.9mA). 2) Suitable for use in digital audio equipment (voltage gain: GV = 11.8dB, output noise voltage: VNO = –102dBm typ.). 3) ATT circuit (gain switch). 4) AVC (Auto Volume Control) circuit, for output limiting. 5) Internal standby switch. 6) Internal mute switch. 7) Internal ripple filter. 8) No output coupling capacitor required. 9) Internal beep circuit. 10) SSOP-A20 package. FAbsolute maximum ratings (Ta = 25_C) FRecommended operating conditions (Ta = 25_C) 871 Audio ICs FBlock diagram BA3575FS 872 Audio ICs FPin descriptions BA3575FS 873 Audio ICs BA3575FS 874 Audio ICs BA3575FS 875 Audio ICs BA3575FS 876 Audio ICs BA3575FS FElectrical characteristics(unless otherwis noted, Ta = 25_C, VCC = 2.4V, RL = 16Ω, f = 1kHz, DIN AUDIO, PWSW = ON, MUTE = OFF, ATT = OFF, and AVC = OFF) 877 Audio ICs FMeasurement circuit BA3575FS 878 Audio ICs FMeasurement circuit switch table (Fig.1) BA3575FS 879 Audio ICs FApplication example BA3575FS 880 Audio ICs BA3575FS FApplication notes (1) “Pop” sound By operating the BA3575FS according to the timing chart shown in Fig.3, i...