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AD8231TCPZ-EP-R7

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20
AD8231-EP
Rev. 0 | Page 10 of 20
2000
–500
0
500
1000
1500
–55 –40 –25 –10 5 20 35 50 65 80 95 110 125
BIAS CURRENT (pA)
TEMPERATURE (°C)
3V
5V
V
REF
= MIDSUPPLY
V
CM
= MIDSUPPLY
09707-209
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)
+V
S
= +2.5V
–V
S
= –2.5V
V
REF
= 0V
09707-006
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
09707-007
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)
09707-003
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
09707-004
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
09707-005
Figure 14. Instrumentation Amplifier Input Common-Mode Range vs.
Output Voltage, V
REF
= 2.5 V
AD8231-EP
Rev. 0 | Page 11 of 20
50
40
30
20
10
0
–10
–20
–30
–40
100 10M1M100k10k1k
GAIN (dB)
FREQUENCY (Hz)
G = 128
G = 64
G = 32
G = 16
G = 8
G = 4
G = 2
G = 1
09707-009
Figure 15. Instrumentation Amplifier Gain vs. Frequency
1000
–1000
–800
–600
–400
–200
0
200
600
900
800
–55 –40 –25 –10 5 20 35 50 65 80 95 110 125
GAIN ERROR (µV/V)
TEMPERATURE (°C)
G = 1
G = 128
09707-216
Figure 16. Instrumentation Amplifier Gain Drift vs. Temperature
140
120
100
80
60
40
10 100 1k 10k 100k
CMRR (dB)
FREQUENCY (Hz)
G = 1
G = 8
G = 128
09707-010
Figure 17. Instrumentation Amplifier CMRR vs. Frequency
20
–30
–25
–20
–15
–10
–5
0
5
10
15
–55 –40 –25 –10 5 20 35 50 65 80 95 110 125
CMRR (µV/V)
TEMPERATURE (°C)
G = 1
G = 8
G = 128
09707-218
Figure 18. Instrumentation Amplifier CMRR vs. Temperature
140
120
100
80
60
40
20
0
1 100k10k1k10010
POSITIVE PSRR (dB)
FREQUENCY (Hz)
G = 1
G = 8
G = 128
09707-146
Figure 19. Instrumentation Amplifier Positive PSRR vs. Frequency
140
120
100
80
60
40
20
0
1 100k100k1k10010
NEGATIVE PSRR (dB)
FREQUENCY (Hz)
G = 1
G = 8
G = 128
09707-147
Figure 20. Instrumentation Amplifier Negative PSRR vs. Frequency
AD8231-EP
Rev. 0 | Page 12 of 20
G = +1, 1µV/DIV
G = +128, 0.4µV/DIV
1s/DIV
09707-012
Figure 21. Instrumentation Amplifier 0.1 Hz to 10 Hz Noise
100
80
60
40
20
90
70
50
30
10
0
1 10 100 1k
NOISE (nV/ Hz)
FREQUENCY (Hz)
G = +1
G = +8
G = +128
09707-011
Figure 22. Instrumentation Amplifier Voltage Noise Spectral Density vs.
Frequency, 5 V, 1 Hz to 1000 Hz
1000
900
800
700
600
500
400
300
200
100
0
1 10 100 1k 10k 100k
NOISE (nV/ Hz)
FREQUENCY (Hz)
G = +1
G = +8
G = +128
09707-008
Figure 23. Instrumentation Amplifier Voltage Noise Spectral Density vs.
Frequency, 5 V, 1 Hz to 1 MHz
100
10
1
0.1
0.01
1 100k10k1k10010
CURRENT NOISE (pA/ Hz)
FREQUENCY (Hz)
09707-107
Figure 24. Instrumentation Amplifier Current Noise Spectral Density
5µs/DIV20mV/DIV
09707-013
Figure 25. Instrumentation Amplifier Small Signal Pulse Response, G = 1,
R
L
= 2 kΩ, C
L
= 500 pF
NO
LOAD
300pF
500pF
800pF
4µs/DIV20mV/DIV
09707-014
Figure 26. Instrumentation Amplifier Small Signal Pulse Response for Various
Capacitive Loads, G = 1
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20

AD8231TCPZ-EP-R7

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Instrumentation Amplifiers Zero Drift Digitally Programmable
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