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Audio ICs
ALS headphone driver
BA3570F / BA3570FS
The BA3570F and BA3570FS are stereo headphone amplifiers with ALS (Auto Loudness System) which have been
designed for use as headphone drivers in audio equipment.
Applications
Stereo headphones
Features
1) The use of ALS (Auto Loudness System) makes it
possible to obtain a dynamic sound regardless of the
volume level.
Block diagram
2) Built-in power mute circuit.
3) Built-in bypass circuit.
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Audio ICs BA3570F / BA3570FS
FPin descriptions (pin numbers are for 22-pin BA3570F)
FAbsolute maximum ratings (Ta = 25_C)
FRecommended operating conditions (Ta = 25_C)
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Audio ICs BA3570F / BA3570FS
FElectrical characteristics (unless otherwise noted, Ta = 25_C, VCC = 3.0V, RL = 16Ω, f = 1kHz,
and the measurement circuit is as shown in Fig. 1)
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