Datasheet

AD8231
Rev. B | Page 10 of 24
2000
1500
1000
500
0
–500
–40 –20 0 20
3V
5V
40 60 80 100 120
BIAS CURRENT (pA)
TEMPERATURE (°C)
V
REF
= MIDSUPPLY
V
CM
= MIDSUPPLY
06586-106
Figure 9. Instrumentation Amplifier Bias Current vs. Temperature
2.0
1.5
1.0
0.5
0
–0.5
–1.0
–1.5
–2.0
–2.5 2.52.01.51.00.50–0.5–1.0–1.5–2.0
BIAS CURRENT (nA)
V
CM
(V)
06586-006
+V
S
= +2.5V
–V
S
= –2.5V
V
REF
= 0V
Figure 10. Instrumentation Amplifier Bias Current vs.
Common-Mode Voltage, 5 V
1.0
–1.0
–0.8
–0.6
–0.4
–0.2
0
0.2
0.4
0.6
0.8
–1.5 1.51.20.90.60.30–0.3–0.6–0.9–1.2
BIAS CURRENT (nA)
V
CM
(V)
+V
S
= +1.5V
–V
S
= –1.5V
V
REF
= 0V
06586-007
Figure 11. Instrumentation Amplifier Bias Current vs.
Common-Mode Voltage, 3 V
6
0V, 4.96V
0V, 2.96V
0V, 0.04V
2.92V, 1.5V
4.92V, 2.5V
5V SINGLE SUPPLY
3V SINGLE SUPPLY
5
4
3
2
1
0
0654321
INPUT COMMON-MODE VOLTAGE (V)
OUTPUT VOLTAGE (V)
06586-003
Figure 12. Instrumentation Amplifier Input Common-Mode Range vs.
Output Voltage, V
REF
= 0 V
6
5
4
3
2
1
0
054.54.03.53.02.52.01.51.00.5
INPUT COMMON-MODE VOLTAGE (V)
OUTPUT VOLTAGE (V)
.0
5V SINGLE SUPPLY
3V SINGLE SUPPLY
0.02V, 2.22V
0.02V, 0.78V
1.5V, 4.96V
0.02V, 4.22V
4.98V, 3.22V
4.98V, 1.78V
1.5V, 2.96V
2.98V, 2.22V
2.98V, 0.78V
1.5V, 0.04V
06586-004
Figure 13. Instrumentation Amplifier Input Common-Mode Range vs.
Output Voltage, V
REF
= 1.5 V
6
5
4
3
2
1
0
054.54.03.53.02.52.01.51.00.5
INPUT COMMON-MODE VOLTAGE (V)
OUTPUT VOLTAGE (V)
.0
5V SINGLE SUPPLY
3V SINGLE
SUPPLY
0.02V, 1.72V
2.5V, 4.96V
0.02V, 3.72V
4.98V, 3.72V
4.98V,1.28V
2.5V, 2.96V
2.98V, 2.72V
2.98V, 0.28V
2.5V, 0.04V
0.02V, 1.28V
06586-005
Figure 14. Instrumentation Amplifier Input Common-Mode Range vs.
Output Voltage, V
REF
= 2.5 V