The OP221GSZ is a monolithic dual Operational Amplifier features wide input voltage range, low supply current drain, extremely low input offset voltage, low offset voltage drift, low noise voltage and low bias current. It is suited for operation from batteries or unregulated power supplies. The excellent specifications of the individual amplifier combined with the tight matching and temperature tracking between channels provided high-performance in instrumentation amplifier designs. It is fully compensated and protected. Matching between channels is provided on all critical parameters including input offset voltage, tracking of offset voltage vs. temperature, non-inverting bias currents and common-mode rejection.