Hi, all:-
The fully differential amplifiers used to drive high res 24+ bit ADCs such as the OPA1632 have excellent AC characteristics (noise & distortion, for e xample) but horrible DC drift and resulting drift and low frequency noise- worse than a 1960s 741 amplifier.
Is there a straightforward way of combining a zero drift or ultra precision amplifier (or in-amp) with a fully differential amplifier to reduce the 'D C' issues?
I need really really good performance from DC (< 1mHz) to low audio (a few kHz and nothing weird between a few kHz and 1MHz)
--sp