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Steve Taranovich

Home on the Range: Getting Multiple Gain Ranges with Instrumentation Amplifiers

Steve Taranovich
7/26/2018 9:22:25 AM
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Although it is somewhat dated the IA AD626 can adjust the gain between 10 and 100 by the use of a resistor connected between the G pin and ground. You could achieve programmable gain by haviong several different resistor values and simply switching them to ground using transistors. The gain itself can vary quite a bit between devices, so calibration would be necessary, but you wouldn't have the constraints of a multiplexer.

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