High-Precision High-Impedance Instrument Amplifier Circuit Composed Of OPA2111

Published:2011/5/19 7:42:00 Author:Robert | Keyword: High-Precision, High-Impedance, Instrument, Amplifier | From:SeekIC

The High-Precision High-Impedance Instrument Amplifier Circuit Composed Of OPA2111 is shown in the picture. The circuit in the picture's total voltage magnification times is Av=10×(1+2R2／R1)=1000 times. The back stage uses a differential amplifier circuit whose gain is 10. This would expand the instrument amplifier's input common-mode voltage range tobe ±10V.



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