LF580 Datasheet, PDF (1/4 Pages) List of Unclassifed Manufacturers – Dual, Continuous, Analog Highpass Filter

Dual, Continuous, Analog
Highpass Filter
LF580 DATA SHEET
FEATURES
DESCRIPTION
• only 2 small capacitors required
• 200 to 10 kHz adjustable corner frequency
• dual 12 dB/Oct Butterworth filter (24 dB/Oct cascaded)
• 1.1 to 3.0 VDC operating range
• adjustable by a single potentiometer
The LF580 continuous analog filter consists of two second
order (12 dB/oct), tunable (0.2 to 10 kHz) highpass Butterworth
filter blocks.
Tracking and corner frequency of each block are controlled
by a single potentiometer. Cascading the two blocks
together results in a single 24dB/oct high pass filter requiring
only two external 0.001 µF capacitors for the filter response.
STANDARD PACKAGING
• 8 pin MICROpac
• 8 pin PLID ^®
• Chip (66 x 61mils)
The output noise of each filter stage is typically 5.6µV.
Cascading the two filter blocks together will produce a
noise level which is
V_N = (V_N1)² + (V_N2)²
Where V_N is the total output noise of both filters, V_N1 and
V_N2 is the noise of each filter.
To improve the signal-to-noise ratio of the filter the LF580
should be placed after a preamplifier, provided that the
signal level does not exceed the maximum signal capability
of 50mVRMS
V_B
4
8
A_IN
0.001
+
A
_
0.001
+
B
_
5
B_OUT
CONTROL
7
6
A_OUT
B_IN
1.8k
3
1
CONTROL GND
All resistors in ohms, all capacitors in microfarads unless otherwise stated
BLOCK DIAGRAM
Revision Date: January 2001
Document No. 500 - 73 - 08
GENNUM CORPORATION P.O. Box 489, Stn. A, Burlington, Ontario, Canada L7R 3Y3 tel. [phone]
Web Site: www.gennum.com E-mail: [e-mail]