AD628
TEST CIRCUITS
HP3589A
SPECTRUM ANALYZER
HP3561A
+V
S
SPECTRUM ANALYZER
+V
S
C
FILT
4
–IN
10kΩ
10kΩ
7
–
+IN
–IN
100kΩ
FET
PROBE
AD829
+
OUT
–IN
–IN
+IN
G = +0.1
+IN
100kΩ
100kΩ
10kΩ
10kΩ
+IN
8
1
+IN
–IN
OUT
G = +100
5
100kΩ
–IN
G = +0.1
+IN
AD628
10kΩ
C
R
FILT
V
G
AD628
REF
10kΩ
–V
S
3
2
6
R
V
G
REF
10kΩ
–V
S
–
10kΩ
AD707
+
Figure 25. CMRR vs. Frequency
Figure 27. Noise Tests
SCOPE
+V
S
1 VAC
+15V
G = +100
G = +100
10kΩ
10kΩ
–IN
+
+IN
OUT
20Ω
100kΩ
AD829
–
–IN
–IN
G = +0.1
+IN
+IN
100kΩ
AD628
10kΩ
V
C
R
G
REF
FILT
–V
S
Figure 26. PSRR vs. Frequency
Rev. F | Page 13 of 20