Datasheet

AD620–Typical Characteristics
FREQUENCY – Hz
1000
100
10
1 10 1000100
CURRENT NOISE – fA/ Hz
Figure 7. Current Noise Spectral Density vs. Frequency
RTI NOISE – 2.0 µV/div
TIME – 1 sec/div
Figure 8a. 0.1 Hz to 10 Hz RTI Voltage Noise (G = 1)
RTI NOISE – 0.1µV/div
TIME – 1 sec/div
Figure 8b. 0.1 Hz to 10 Hz RTI Voltage Noise (G = 1000)
10
90
100
0%
 100mV
 1s
Figure 9. 0.1 Hz to 10 Hz Current Noise, 5 pA/Div
100
1000
AD620A
FET INPUT
IN-AMP
SOURCE RESISTANCE – Ω
TOTAL DRIFT FROM 25°C TO 85°C, RTI – µV
100,000
10
1k 10M
10,000
10k 1M100k
Figure 10. Total Drift vs. Source Resistance
FREQUENCY – Hz
CMR – dB
+160
0
1M
+80
+40
1
+60
0.1
+140
+100
+120
100k10k1k10010
G = 1000
G = 100
G = 10
G = 1
+20
Figure 11. CMR vs. Frequency, RTI, Zero to 1 k Ω Source
Imbalance
REV. D
–6–