AD604
Rev. E | Page 8 of 32
VGN (V)
G
AI
N E
RRO
R (
d
B)
2.0
1.5
1.0
0.5
0
–0.5
–1.0
–1.5
–2.0
FREQUENCY (Hz)
GA
IN
(
d
B
)
50
40
–50
30
20
10
0
–10
–20
–30
–40
100k
1M
10M
100M
0.2
0.7
1.2
1.7
2.2
2.7
20dB/V
VREF = 2.5V
30dB/V
VREF = 1.67V
00
54
0-
00
9
Figure 9. Gain Error vs. VGN for Two Gain Scaling Values
DELTA GAIN (dB)
P
E
RCE
NT
A
G
E
25
20
15
10
5
0
–1.0
–0.8
–0.6
–0.4
–0.2
0.1
0.3
0.5
0.7
0.9
N = 50
VGN1 = 1.0V
VGN2 = 1.0V
Δ
G(dB) =
G(CH1) – G(CH2)
00
54
0-
0
10
Figure 10. Gain Match; VGN1 = VGN2 = 1.0 V
DELTA GAIN (dB)
P
E
RCE
NT
A
G
E
25
20
15
10
5
0
–1.0
–0.8
–0.6
–0.4
–0.2
0.1
0.3
0.5
0.7
0.9
N = 50
VGN1 = 2.50V
VGN2 = 2.50V
Δ
G(dB) =
G(CH1) – G(CH2)
00
54
0-
0
11
Figure 11. Gain Match; VGN1 = VGN2 = 2.50 V
VGN = 2.9V
VGN = 2.5V
VGN = 1.5V
VGN = 0.5V
VGN = 0.1V
VGN = 0V
00
54
0-
01
2
VGN (V)
2.55
Figure 12. AC Response for Various Values of VGN
VOCM = 2.5V
2.54
2.53
2.52
2.51
2.50
2.49
2.48
2.45
2.46
2.47
–40°C
+25°C
+85°C
V
OU
T
(V
)
0.2
0.7
1.2
1.7
2.2
2.7
00
54
0-
0
13
210
Figure 13. Output Offset vs. VGN for Three Temperatures
VGN (V)
190
170
150
130
110
90
0.1
0.5
0.9
1.3
1.7
2.1
2.5
2.9
NO
IS
E
(
n
V
/
Hz
)
–40°C
+25°C
+85°C
00
54
0-
01
4
Figure 14. Output Referred Noise vs. VGN for Three Temperatures
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