ROHM BA3834S, BA3834F Datasheet

Audio ICs

Band-pass filter for spectrum analyzer

BA3834S / BA3834F

The BA3834S and BA3834F are 7-band, band-pass filter ICs that use microprocessor time division to produce serial
output for spectrum analyzer displays. To minimize the number of attached components required and enable compact
and reliable designs, all of the capacitors for the filters are on the chip.

Applications
CD radio cassette players, mini-component stereo sys­tems, car stereos

Features

1) Seven band-pass filter elements for spectrum ana­lyzer displays.

2) High-speed readout
(output response time: 5µsec. Typ.).

Absolute maximum ratings (Ta = 25C)

3) Discharge time constant circuit for each band is on
the chip.

4) Differential input amplifier rejects common-mode
noise.

5) Single 5V power supply.

Recommended operating conditions (Ta = 25C)

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Audio ICs BA3834S / BA3834F

Block diagram 1 (BA3834S)

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Audio ICs BA3834S / BA3834F

Block diagram 2 (BA3834F)

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