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GH580

Adjustable Analog Highpass Filter

Gennum -> Semtech 

FEATURES

• 200 to 8 kHz adjustable corner frequency

• 12 dB/oct Butterworth filter

• low current drain (175 µA typical)

• two on chip 1 nF capacitors

• low noise and distortion

• 1.1 to 3.0 VDC operation

STANDARD PACKAGING

• 8 pin PLID®

• Chip (66 x 61 mils)

Adjustable Analog

Highpass Filter

GH580 - DATA SHEET

DESCRIPTION

The GH580 is a single, second order (12 dB/Oct) continuous

high pass filter with an adjustable corner frequency (ƒC) from

200 to 8 kHz. Adjustment of ƒC is accomplished with a single

100 kΩ potentiometer connected from pin 3 to ground.

The bias circuitry is operated from an on chip voltage regulator

providing good supply rejection down to 1.1 V.

The two integrated 1nF capacitors have parasitic diodes

connected in parallel. This necessitates that the DC voltage

at pin 6 be greater that 400 mV and less than VB and that pins

8 and 7 be no greater than approximately 400 mV DC.

The GH580 has a dynamic range of approximately 80 dB.

8

A IN

6

CP+

CP- 7

+

1n

+

1n

VB

4

VREG

+

A

_

CONTROL

A OUT

5

1

GND

3

RCNT

BLOCK DIAGRAM

Revision Date: January 2001

Document No. 520 - 50 - 05

GENNUM CORPORATION P.O. Box 489, Stn. A, Burlington, Ontario, Canada L7R 3Y3 tel. +1 (905) 632-2996

Web Site: www.gennum.com E-mail: hipinfo@gennum.com

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