Datasheet

AD637
Rev. K | Page 18 of 20
00788-130
GND1 GND2 GND3 GND4
C1
10µF
25V
C2
10µF
25V
–
V
S
+
+
V
S
–V
S
+V
S
+
+
CF2
47µF
25V
C
AV
22µF
16V
+
CF1
47µF
25V
+
+
C3
0.1µF
CIN
22µF
16V
BUF_OUT
DC_OUT
RMS_IN
DC_OUT
2
1
4
3
6
5
8
7
15
16
13
14
11
12
9
10
NC
BUFF IN
OUTPUT
OFFSET
COMMON
DEN INPUT
CS
NC
Z1
AD637
dB OUTPUT
V
IN
BUFF OUT
+V
S
NC
RMS OUT
–V
S
NC
C
AV
R3
4.7k
+V
S
C4
0.1µF
–V
S
R4
24.3k
R1
1M
R2
50k
DB_OUT
BUF_IN
RMS_IN
R5
24.3k
+V
S
+V
S
–V
S
4
1
2
3
5
6
IN
OUT
FILTER
Figure 30. Evaluation Board Schematic
00788-131
PRECISION DMM TO
MONITOR VOUT
POWER
SUPPLY
A
C OR DC INPUT SIGNAL SOURCE
FROM PRECISION CALIBRATOR
OR FUNCTION GENERATOR
Figure 31. AD637-EVALZ Typical Bench Configuration