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INA configuration using OPA3695

Other Parts Discussed in Thread: OPA3695


I need high speed amplifiers with high slew rate in order to amplify a differential signal coming from sensors. In the end I need a single signal so I figured the best option is to use the OPA3695 since it has very high slew rate and the IC comes with the 3 amps which makes it ease to implement the instrumentation amplifier configuration. A have a transformer prior to the inputs of the amplifier to avoid low frequency noise, and I'll be using a +/-1.75V voltage supply to limit my output to ~ +/- 0.8V.

I don't need a very high gain, around +2V/V to +4 V/V would be fine, my question is what are the best recommended feedback resistors for such a low voltage supply.


Cristina Oliveira