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: firstname.lastname@example.org
I would be grateful if you could help me