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building an instrumentation amplifier from discrete components

Question asked by danyvak on Feb 17, 2014
Latest reply on Feb 18, 2014 by harryh


I have some doubts about building an adc driver.

I have to build an amplifier for the differential adc. The sensor is geophone.

The design should have lowest noise and lowest power consumtion.



I can use an instrumentation amlpifier ad8422 with some operational amplifier to create a differential output.



or i can use a ADA4084 (dual version) in order to build a first stage of the instrumentation amplifier from the discrete componentds.



The gain of the amplifier should be about 1000.



I don't care to much about the offset because of the HPF in the dsp algorithm .



I will be thankful for any suggestion .



best regards