Datasheet

AD8420 Data Sheet
Rev. 0 | Page 12 of 28
40
35
30
25
20
15
10
5
–2.0 0 3.02.52.01.51.00.5
INPUT BIAS CURRENT (nA)
COMMON-MODE VOLTAGE (V)
09945-019
+2.7V
I
BIAS
(+IN)
I
BIAS
(–IN)
–0.2V
Figure 21. Input Bias Current vs. Common-Mode Voltage
400
–400
–300
–200
–100
0
100
200
300
–2.0 –1.5 –1.0 –0.5 0 0.5 1.0 1.5 2.0
INPUT BIAS CURRENT (nA)
DIFFERENTIAL INPUT VOLTAGE (V)
09945-020
I
BIAS
(+IN)
I
BIAS
(–IN)
SPECIFIED
PERFORMANCE RANGE
Figure 22. Input Bias Current vs. Differential Input Voltage, V
S
= ±15
100
0
20
40
60
80
0.1 1 10 100 1k 10k 100k
PSRR (dB)
FREQUENCY (Hz)
GAIN = 1000
BANDWIDTH
LIMIT
GAIN = 100
GAIN = 10
GAIN = 1
09945-500
Figure 23. PSRR vs. Frequency on 5 V Supply
120
0
20
40
60
80
100
0.1 1 10 100 1k 10k 100k
POSITIVE PSRR (dB)
FREQUENCY (Hz)
GAIN = 1000
BANDWIDTH
LIMIT
GAIN = 100
GAIN = 10
GAIN = 1
09945-323
V
S
= ±15V
Figure 24. Positive PSRR vs. Frequency, RTI, V
S
= ±15 V
120
0
20
40
60
80
100
0.1 1 10 100 1k 10k 100k
NEGATIVE PSRR (dB)
FREQUENCY (Hz)
GAIN = 1000
GAIN = 100
GAIN = 10
GAIN = 1
09945-324
BANDWIDTH
LIMIT
V
S
= ±15V
Figure 25. Negative PSRR vs. Frequency, RTI, V
S
= ±15 V
70
–30
–20
–10
0
10
20
30
40
50
60
1 10 100 1k 10k 100k 1M
GAIN (dB)
FREQUENCY (Hz)
09945-023
V
S
= ±15V
GAIN = 1000
GAIN = 100
GAIN = 10
GAIN = 1
Figure 26. Gain vs. Frequency