Re: Low drift OP amp for photodiode circuit

On Sep 21, 2:12 am, garnet <garnetho...@xxxxxxxxx> wrote:


I'm not up to date with the latest op amp technology and was wondering
what are the lowest drift op amps available now without using an oven.
This is for a photodiode circuit for low level light measurement.

Even several decades ago, uA725 and OP-07 amplifiers were as
accurate on DC drift as could be easily measured. Thermocouple
effects from wiring are likely to be dominant in your application,
not
amplifier drift.

Input current errors are more likely than offset voltage errors to be
the limit on a low-light photodiode, so a FET input may be best.
Maybe LMC6061? Be careful to shield the input wiring.

.