BA3578FS

Audio ICs Headphone driver for digital audio BA3578FS / BA3579FS The BA3578FS and BA3579FS are headphone drivers with internal an LPF and fixed bass boost circuit for multi-bit D / A converters. FApplications Portable CD players FFeatures 1) Suitable for use in digital audio equipment (line-out output noise voltage: 18µVrms, S / N = 95dB Typ.). 2) Internal LPF for multi-bit D / A converters (fc = 34kHz, *12dB / oct. Typ.). 3) Headphone mute function. 4) 5) 6) 7) Internal BB (bass boost) circuit. Internal supply current for line-mute transistor. No need for output oscillation preventive measures. Internal standby switch. FAbsolute maximum ratings (Ta = 25_C) FRecommended operating conditions FRecommended operating range 450 Audio ICs FBlock diagram BA3578FS / BA3579FS 451 Audio ICs BA3578FS / BA3579FS 452 Audio ICs BA3578FS / BA3579FS FElectrical characteristics (Unless otherwise noted, Ta = 25_C, PVCC = AVDD = 3.6V, f = 1kHz, PwSw = ON, MUTE = OFF, BB = OFF, Line RL1 = 47kΩ, headphone RL2 = 32Ω, filter = DIN AUDIO, line-out measurements are with VIN3 and 4 = 0V) 453 Audio ICs FMeasurement circuits BA3578FS / BA3579FS 454 Audio ICs BA3578FS / BA3579FS 455 Audio ICs Measurement conditions BA3578FS / BA3579FS 456 Audio ICs FApplication examples BA3578FS / BA3579FS 457 Audio ICs BA3578FS / BA3579FS 458 Audio ICs BA3578FS / BA3579FS FCircuit operation (1) By operating the BA3578FS and BA3579FS according to the timing chart shown in Fig. 5, it i...