Rohm BA3641FV Recording amplifier with built-in alc for headphone stereo Datasheet

Audio ICs
Recording amplifier with built-in ALC
for headphone stereos
BA3641FV
The BA3641FV is an option IC developed for the purpose of adding a recording function to 1-chip playback system ICs
(BA3612AKV, etc.) for headphone stereos.
Applications
Headphone stereos with recording function
Features
1) Two built-in microphone amplifier channels.
2) Microphone mute function (radio / microphone
switching).
3) Two built-in recording amplifier channels (with ALC).
Absolute maximum ratings (Ta = 25C)
Recommended power supply voltage ranges (Ta = 25C)
326
4) Two built-in monitor output amplifier channels (radio / microphone switching).
5) Built-in regulators for the erase head and bias OSC
circuit.
Audio ICs
BA3641FV
Block diagram
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Audio ICs
Pin descriptions
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BA3641FV
Audio ICs
BA3641FV
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Audio ICs
BA3641FV
Electrical characteristics (unless otherwise noted, Vcc = 2.3V, RF = 2.0V, +B = 1.2V, VREF = 1.0V, RL = 5kΩ,
f = 1kHz, DIN-AUDIO, Ta = 25C)
330
Audio ICs
BA3641FV
331
Audio ICs
Measurement circuit
Switch logic table
332
BA3641FV
Audio ICs
BA3641FV
Application example
333
Audio ICs
Electrical characteristic curves
334
BA3641FV
Audio ICs
BA3641FV
335
Audio ICs
External dimensions (Units: mm)
336
BA3641FV
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