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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.

FApplications

CD radio cassette players, mini-component stereo sys-

tems, car stereos

FFeatures

1) Seven band-pass filter elements for spectrum ana-

lyzer displays.

2) High-speed readout

(output response time: 5

µsec. Typ.).

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.

FAbsolute maximum ratings (Ta = 25_C)

FRecommended operating conditions (Ta = 25_C)