Datasheet

AD8421 Data Sheet
Rev. 0 | Page 12 of 28
40
–40
–35 40
INPUT CURRENT (mA)
INPUT VOLTAGE (V)
–30
–20
–10
0
10
20
30
–30–25–20–15–10–5 0 5 101520253035
V
S
= 5V
G = 100
10123-015
Figure 16. Input Overvoltage Performance; +V
S
= 5 V, −V
S
= 0 V, G = 100
30
–30
–25 25
INPUT CURRENT (mA)
INPUT VOLTAGE (V)
–20
–10
0
10
20
–20 –15 –10 –5 0 5 10 15 20
V
S
= ±15V
G = 100
10123-016
Figure 17. Input Overvoltage Performance; V
S
= ±15 V, G = 100
2.5
–2.5
–12 14
BIAS CURRENT (nA)
COMMON-MODE VOLTAGE (V)
–2.0
–1.5
–1.0
–0.5
0
0.5
1.0
1.5
2.0
–10–8–6–4–2024681012
10123-017
Figure 18. Input Bias Current vs. Common-Mode Voltage
160
140
120
100
80
60
40
20
0
0.1 1 10 100 1k 10k 100k 1M
FREQUENCY (Hz)
POSITIVE PSRR (dB)
GAIN = 100
GAIN = 10
GAIN = 1
GAIN = 1000
10123-018
Figure 19. Positive PSRR vs. Frequency
160
140
120
100
80
60
40
20
0
0.1 1 10 100 1k 10k 100k 1M
FREQUENCY (Hz)
NEGATIVE PSRR (dB)
GAIN = 100
GAIN = 10
GAIN = 1
GAIN = 1000
10123-019
Figure 20. Negative PSRR vs. Frequency
70
–30
100 1k 10k 100k 1M 10M
GAIN (dB)
FREQUENCY (Hz)
–20
–10
0
10
20
30
40
50
60
GAIN = 100
GAIN = 10
GAIN = 1
GAIN = 1000
10123-020
Figure 21. Gain vs. Frequency
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