Adjustable Analog
Highpass Filter
GH580 - DATA SHEET
FEATURES
•
200 to 8 kHz adjustable corner frequency
•
12 dB/oct Butterworth filter
•
low current drain (175
µ
A typical)
•
two on chip 1 nF capacitors
•
low noise and distortion
•
1.1 to 3.0 VDC operation
DESCRIPTION
The GH580 is a single, second order (12 dB/Oct) continuous
high pass filter with an adjustable corner frequency (ƒ
C
) from
200 to 8 kHz. Adjustment of ƒ
C
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 1 nF 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.
STANDARD PACKAGING
• 8 pin PLID
®
• Chip (66 x 61 mils)
V
B
4
V
REG
8
A IN
+
1n
+
A
_
5
A OUT
CP+
6
+
1n
CONTROL
CP-
7
1
GND
3
R
CNT
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
GENNUM [ GENNUM CORPORATION ]
