Resistor Programmable Active Audio Filter

Data Sheet

6/2014

Description

The resistor programmable continuous audio

active filter IC Is a CMOS chip that can be

configured for either a lowpass, bandpass,

highpass, allpass or notch filter. B u t t e r -

worth, Be ssel , ellip ti c an d Chebyshev fil -

ters can be implem ented. The frequ ency

ra n g e co ve r s the audio spec trum to 80 kHz.

The low power m ode has a frequ ency range

to 10 kHz. A po wer down pin red u ces c u r-

rent c o nsumption when th e filte r is not in

use. The 8 pin p a rt is a single filter stage,

the 16 pin part o f fers a dual fi lte r stage.

Betwe en 2 a n d 5 e x ternal re si stors set the

fil t er chara c teristics depe nding on th e de -

si red respon se . Q c a n b e set from between

0. 25 and 50 . No clo c k signal is requ ired.

Blo ck Diagr a m

Features

Ind e pend ent Q , freque ncy and gain

adjustments

Lo w s e nsi t iv it y to external resist or variation

Operates up to 80 kHz

Q range from 0.25 to 50

L o w Power Operation

Lo w Vo lta g e Op e r ati o n

On Chip Power Save Pin Ca scadable for

Higher O rder Filtering

Applications

Spectrum An a l yzers

General Purp ose Systems

Porta b le System s

Anti-Alias Fi lte r s

R e cons truction Filters

Telecom munications

Trac kin g F i lte r s

Ha rm onic An a l ysis

Noise An al ysis

Data Commun i ca tion

Wire less Appl ication s

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Absolute Maximum Ratings

Power Supply Voltage

+6V

Storage Temperature

-60 to +150 C

Operating Temperature

0 to 70 C

A1

A3

A2

C = 159 pF

RFO2

RFO1

RQ

RLP

C

C

C

RBP

OUT2

INLP

INBP

VHP

OUT1

VBP

VLP