AN-0992: Active Filter Evaluation Board for Differential Amplifiers (Rev. 0)

AN-0992
APPLICATION NOTE
One Technology Way • P.O. Box 9106 • Norwood, MA 02062-9106, U.S.A. • Tel: 781.329.4700 • Fax: 781.461.3113 • www.analog.com
Active Filter Evaluation Board for Differential Amplifiers
by John Ardizzoni
The boards also have provisions for edge-mounted SMA
connectors, which simplify testing and integration. The input
of the filter can be driven either single-ended or differentially.
The EVAL-FLTR-DF-1RZ active filter evaluation board is
designed to work with the Analog Devices, Inc., differential
amplifiers. The filter board enables quick prototyping of two- or
three-pole multiple feedback active filters. The board schematic
shown in Figure 1 is for a low-pass filter. Converting the board
from a low-pass filter to a high-pass filter is accomplished by
swapping the location of the filters resistors and capacitors.
The active filter evaluation boards are bare, which enables
users to customize the filter design. The filter board assembly
drawing is shown in Figure 2. All components are 0603 case
sizes with the exception of the large bypass capacitors, which
are 3216 case sizes.
+VS
C11
10µF
+
C10
0.1µF
AGND
R2
R4
R5
VIN1
VOUT1
C1
R1
C2
GND
C4
C5
7
V+
R3
R9
C3
3
8
1
U1
5
NC
VOCM
4
V– 2
C7
6
GND
C6
R10
GND
VIN2
R11
R6 R7
VOUT2
R8
AGND
GND
+
C9
–VS 10µF
GND
07954-001
C8
0.1µF
Figure 1. Active Filter Evaluation Board Schematic
SECONDARY SIDE
07954-002
PRIMARY SIDE
Figure 2. Active Filter Evaluation Board Assembly Drawing
Rev. 0 | Page 1 of 2
AN-0992
Application Note
NOTES
©2008 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
AN07954-0-12/08(0)
Rev. 0 | Page 2 of 2
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