Datasheet
AD8221
Rev. C | Page 12 of 24
–30
–20
–10
0
10
20
30
40
50
60
70
100 1k 10k 100k 1M 10M
FREQUENCY (Hz)
GAIN (dB)
03149-015
GAIN = 1000
GAIN = 100
GAIN = 10
GAIN = 1
Figure 16. Gain vs. Frequency
40
60
80
100
CMRR (dB)
120
140
160
0.1 1 10 100 1k 10k 100k 1M
FREQUENCY (Hz)
03149-016
GAIN = 1000
GAIN = 100
GAIN = 10
GAIN = 1
Figure 17. CMRR vs. Frequency, RTI
40
60
80
100
CMRR (dB)
120
140
160
0.1 1 10 100 1k 10k 100k 1M
FREQUENCY (Hz)
03149-017
GAIN = 1000
GAIN = 100
GAIN = 10
GAIN = 1
Figure 18. CMRR vs. Frequency, RTI, 1 kΩ Source Imbalance
–100
–80
–60
–40
–20
0
20
40
60
80
100
CMR (µV/V)
–40 –20 0 20 40 60 80 100 120 140
TEMPERATURE (°C)
03149-018
Figure 19. CMR vs. Temperature
–V
S
+0
+0.4
+0.8
+1.2
+1.6
+2.0
+2.4
–1.6
–2.0
–2.4
–1.2
–0.8
–0.4
+V
S
–0
INPUT VOLTAGE LIMIT (V)
REFERRED TO SUPPLY VOLTAGES
SUPPLY VOLTAGE (±V)
50 10 15 20
03149-019
Figure 20. Input Voltage Limit vs. Supply Voltage, G = 1
–V
S
+0
+0.4
+0.8
+1.2
+1.6
+2.0
–1.6
–2.0
–1.2
–0.8
–0.4
+V
S
–0
OUTPUT VOLTAGE SWING (V)
REFERRED TO SUPPLY VOLTAGES
SUPP
LY VOLTAGE (±V)
50 10 15 20
03149-020
R
L
= 10kΩ
R
L
= 2kΩ
R
L
= 10kΩ
R
L
= 2kΩ
Figure 21. Output Voltage Swing vs. Supply Voltage, G = 1