Datasheet

AD625
REV. D–6–
TEMPERATURE – C
INPUT CURRENT – nA
40
–125
30
20
10
0
–10
–20
–30
–40
–75 –25 25 75 125
Figure 10. Input Bias Current vs.
Temperature
SUPPLY VOLTAGE – V
AMPLIFIER QUIESCENT CURRENT – A
8.0
0
6.0
4.0
2.0
0
5101520
Figure 13. Quiescent Current vs.
Supply Voltage
Figure 16. Low Frequency Voltage
Noise, G = 1 (System Gain = 1000)
+V
S
–V
S
AD625
10V
V
OUT
Figure 11. Overrange and Gain
Switching Test Circuit (G = 8, G = 1)
FREQUENCY – Hz
VOLT NSD – nV/ Hz
1
1000
100
10
1
0.1
10 100 1k 10k 100k
G = 1
G = 10
G = 100, 1000
G = 1000
Figure 14. RTI Noise Spectral
Density vs. Gain
+V
S
–V
S
AD625
DUT
–V
S
1/2
+V
S
1/2
AD712
1F
1F
1F
16.2k
100
G = 1000
G = 1, 10, 100
1k
1.62M
9.09k
1.82k
16.2k
AD712
Figure 17. Noise Test Circuit
Figure 12. Gain Overrange Recovery
FREQUENCY – Hz
CURRENT NOISE SPECTRAL DENSITY – fA/ Hz
100k
1
10k
1k
100
10
10 100 1k 10k 100k
Figure 15. Input Current Noise
Figure 18. Low Frequency Voltage
Noise, G = 1000 (System
Gain = 100,000)