FET-input Op Amp Has Lowest Combined V and I Noise

AD743 has low voltage- and current noise, also low offset and drift, plus excellent ac specs

The AD743 monolithic FET-input operational amplifier combines the voltage-noise specifications of a low-noise bipolar-transistor-input amplifier with the very low current noise inherent in a FET-input device. Current noise is typically 6.9fA/√Hz at 1 kHz, yet voltage noise is only 2.9 nV/√Hz at 10 kHz–the best in its class. Read full article