AD620
1000
CURRENT NOISE (fA/ Hz)
100
10
1
10
100
FREQUENCY (Hz)
1000
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Figure 11. Current Noise Spectral Density vs. Frequency
Figure 14. 0.1 Hz to 10 Hz Current Noise, 5 pA/Div
100,000
TOTAL DRIFT FROM 25
°
C TO 85
°
C, RTI (
µ
V)
RTI NOISE (2.0
µ
V/DIV)
10,000
FET INPUT
IN-AMP
1000
AD620A
100
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TIME (1 SEC/DIV)
10
1k
10k
100k
1M
SOURCE RESISTANCE (
Ω
)
10M
Figure 12. 0.1 Hz to 10 Hz RTI Voltage Noise (G = 1)
Figure 15. Total Drift vs. Source Resistance
160
140
120
100
G = 1000
G = 100
G = 10
RTI NOISE (0.1
µ
V/DIV)
CMR (dB)
G=1
80
60
40
20
0
0.1
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TIME (1 SEC/DIV)
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1
10
100
1k
FREQUENCY (Hz)
10k
100k
1M
Figure 13. 0.1 Hz to 10 Hz RTI Voltage Noise (G = 1000)
Figure 16. Typical CMR vs. Frequency, RTI, Zero to 1 kΩ Source Imbalance
Rev. G | Page 8 of 20
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AD [ ANALOG DEVICES ]
