AN-0993: Active Filter Evaluation Board for Analog Devices, Inc., - Low...

AN-0993
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 Analog Devices, Inc.,
Low Distortion Pinout Op Amps
by John Ardizzoni
plished by swapping the location of the filters resistors and
capacitors. The boards also have provisions for edge-mounted
SMA connectors, which simplify testing and integration.
The EVAL-FLTR-LD-1RZ active filter evaluation board is
designed to work with the Analog Devices, Inc., low distortion SOIC pinout op amps, which include the following high
performance devices: AD8000, AD8099, AD8045, ADA4899,
and ADA4857. The active filter board enables quick prototyping
of two-, four-, or six-pole Sallen-Key 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 accom-
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.
C1
C8
C3
0.01µF
C4
10µF
+
R2
7
3
C2
U1
2
R3
4
–V
7
3
4
C6
10µF
+
R7
C11
0.01µF
1
GND
R4
GND
–VS
GND
R9
6
U2
2
RA
–V
R10
7
3
8
C13
2
RB
GND
R8
–VS
C17
0.01µF
1
–V
C18
10µF
+
GND
GND
–VS
SECTION B
GND
J4
4
R11 R12
GND
SECTION A
RC
6
U3
C12
10µF
+
–VS
TP3
PD GND
+V
8
C7
C5
0.01µF
1
GND
R6
J2
+VS
GND
SECTION C
Figure 1. Active Filter Evaluation Board Schematic
COMPONENT SIDE
CIRCUIT SIDE
07955-002
GND
R5
6
C16
10µF
+
TP2
PD GND
+V
8
+VS
07955-001
RT
C10
10µF
+
J3
R1
J1
C15
0.01µF
+VS
TP1
PD GND
+V
C14
C9
0.01µF
+VS
Figure 2. Active Filter Evaluation Board Assembly Drawing
Rev. 0 | Page 1 of 2
AN-0993
Application Note
NOTES
©2008 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
AN07955-0-12/08(0)
Rev. 0 | Page 2 of 2
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