ANALOG DEVICES OP200 handbook (1)
Datasheet
OP200 is a low offset, low power dual operational amplifier with extremely low input offset voltage and drift, ensuring normal operation over the entire military temperature range. The OP200's open-loop gain exceeds 5,000,000 into a 10 kW load; input bias current is under 2 nA; CMR is over 120 dB and PSRR below 1.8 mV/V.