Datasheet AD620 (Analog Devices) - 7

AD620 1000 (fA/ Hz) E 100 NT NOIS CURRE 10
00775-0-014
1 10 100 1000 FREQUENCY (Hz)
00775-0-011 Figure 9. Current Noise Spectral Density vs. Frequency Figure 12. 0.1 Hz to 10 Hz Current Noise, 5 pA/Div
100,000
μ
V) 10,000 IV)
°
C, RTI (5
μ
V/D .0 FET INPUT 2 IN-AMP
°
C TO 8 1000 RTI NOISE ( AD620A 100 TOTAL DRIFT FROM 25 TIME (1 SEC/DIV)
00775-0-012
10 1k 10k 100k 1M 10M SOURCE RESISTANCE (
Ω
)
00775-0-015 Figure 10. 0.1 Hz to 10 Hz RTI Voltage Noise (G = 1) Figure 13. Total Drift vs. Source Resistance
160 140 G = 1000 G = 100 120 IV) G = 10
μ
V/D 100 .1 0 G = 1 80 CMR (dB) 60 RTI NOISE ( 40 20 0 TIME (1 SEC/DIV)
00775-0-013
0.1 1 10 100 1k 10k 100k 1M FREQUENCY (Hz)
00775-0-016 Figure 11. 0.1 Hz to 10 Hz RTI Voltage Noise (G = 1000) Figure 14. Typical CMR vs. Frequency, RTI, Zero to 1 kΩ Source Imbalance Rev. H | Page 7 of 20 Document Outline SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION Make vs. Buy: a Typical Bridge Application Error Budget Pressure Measurement Medical ECG Precision V-I Converter GAIN SELECTION INPUT AND OUTPUT OFFSET VOLTAGE REFERENCE TERMINAL INPUT PROTECTION RF INTERFERENCE COMMON-MODE REJECTION GROUNDING GROUND RETURNS FOR INPUT BIAS CURRENTS AD620ACHIPS INFORMATION OUTLINE DIMENSIONS ORDERING GUIDE