The OP90 is a high performance, micropower op amp that operates from a single supply of 1.6 V to 36 V or from dual supplies of 0.8 V to 18 V. The input voltage range includes the negative rail allowing the OP90 to accommodate input signals down to ground in a single-supply operation. The OP90's output swing also includes a ground when operating from a single-supply, enabling "zero-in, zero-out" operation. The OP90 draws less than 20 A of quiescent supply current, while able to deliver over 5 mA of output current to a load. The input offset voltage is below 150 V eliminating the need for