Audio ICs
Headphone driver for digital audio
BA3578FS / BA3579FS
The BA3578FS and BA3579FS are headphone drivers with i...
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
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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...