Datasheet

AD8231-EVALZ
Rev. 0 | Page 2 of 2
IN-AMP
LOGIC
1
–INA
2
+INA
3
4
VS
12
11
OUTA
10
REF
9
16 15 14 13
5 6 7
8
OP
AMP
AD8231
V
S
C1
10µF
C3
SPARE
C4
SPARE
C12
SPARE
C5
SPARE
R1
0Ω
R2
0Ω
SDN
RC11
10kΩ
R13
0Ω
R10
0Ω
R9
SPARE
R7
10kΩ
R12
0Ω
VS
OP_IN
OP_NEG
OP_OUT
C10
SPARE
R8
0Ω
C2
0.1µF
IN-AMP
LOGIC
1
–DIFFI
2
+DIFFI
3
4
VS
12
11
+DIFFO
10
–DIFFO
9
16 15 14 13
5 6 7 8
OP
AMP
AD8231
C7
SPARE
C8
SPARE
C9
SPARE
R3
0Ω
R4
0Ω
DIFF_REF
R5
10kΩ
R6
10kΩ
C6
0.1µF
A2
A1
A0
CS
0
7016-005
+
Figure 3. AD8231-EVALZ Schematic
Additional 0603 component pads have been placed and routed to
allow several other types of op amp configurations. Figure 4 shows
how to put the op amp in either an inverting or noninverting gain
configuration. To make a noninverting configuration, drive the
OP_IN pin with the incoming signal and the OP_NEG pin with a
bias voltage. For an inverting configuration, drive the OP_NEG pin
with the incoming signal and the OP_IN pin with a bias voltage.
R12
OP_OUT
OP_NEG
OP_IN
R9
0
7016-003
Figure 4. Inverting or Noninverting Configuration
The op amp can also be configured for filtering. Figure 5 shows
how to make a Sallen-Key filter.
R12
R10 R13
OP_OUT
OP_IN
C12
RC11
R9
OP_NEG
0
7016-004
Figure 5. Sallen-Key Filter
ORDERING GUIDE
Model Description
AD8231-EVALZ
1
Evaluation Board
1
Z = RoHS Compliant Part.
ESD CAUTION
©2008 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
EB07016-0-11/08(0)