Datasheet

Data Sheet AD8421
Rev. 0 | Page 13 of 28
40
60
80
100
CMRR (dB)
120
140
160
0.1 1 10 100 1k 10k 100k
FREQUENCY (Hz)
GAIN = 1000
GAIN = 100
GAIN = 10
GAIN = 1
10123-021
Figure 22. CMRR vs. Frequency
40
60
80
100
CMRR (dB)
120
140
160
0.1 1 10 100 1k 10k 100k
FREQUENCY (Hz)
GAIN = 1000
GAIN = 100
GAIN = 10
GAIN = 1
10123-022
Figure 23. CMRR vs. Frequency, 1 kΩ Source Imbalance
2.0
1.5
0.5
0
1.0
–0.5
05
CHANGE IN INPUT OFFSET VOLTAGE (µV)
WARM-UP TIME (Seconds)
5 1015202530354045 0
10123-023
Figure 24. Change in Input Offset Voltage (V
OSI
) vs. Warm-Up Time
6
–8
–40 125
BIAS CURRENT (nA)
TEMPERATURE (°C)
–6
–4
–2
0
2
4
–25–105 203550658095110
REPRESENTATIVE SAMPLES
10123-024
Figure 25. Input Bias Current vs. Temperature
100
–80
–40 125
GAIN ERROR (µV/V)
TEMPERATURE (°C)
–60
–40
–20
0
20
40
60
80
–25–105 203550658095110
REPRESENTATIVE SAMPLES
GAIN = 1
10123-025
Figure 26. Gain vs. Temperature (G = 1)
15
10
5
–15
–10
–5
0
–40 125
CMRR (µV/V)
TEMPERATURE (°C)
–25–105 203550658095110
REPRESENTATIVE SAMPLES
GAIN = 1
10123-074
Figure 27. CMRR vs. Temperature (G = 1)