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Differential instrument Amplifier :)

Question asked by xzsawq21 on Mar 5, 2017
Latest reply on Mar 8, 2017 by Emman.A


I want to make a very accurate differential instrument amplifier!

I have a 50mVp-p signal with the frequency range of 10KHz to 10MHz.

I've used two OPA657 to buffer the signal and then I connected the differential result signal to the ADA4930 to measure the signal with differential input ADC.

could you please give me a circuit? I've designed one but I have concerned about the miss matching between amplifier stages!

for ADA4930-1 consider Vocm=1.65v, +Vs=+5v, -Vs=0v, gain=4V/V or 5V/V

it's my email:

I would be grateful if you could help me


Best Regards