The AD8021 is an exceptionally high performance, high speed voltage feedback amplifier that can be used in 16-bit resolution systems. It is designed to have both low voltage and low current noise (2.1 nV/Hz typical and 2.1 pA/Hz typical) while operating at the lowest quiescent supply current (7 mA @ 5 V) among today's high speed, low noise op amps. The AD8021 operates over a wide range of supply voltages from 2.25 V to 12 V, as well as from single 5 V supplies, making it ideal for high speed, low power instruments. An output disable pin allows further reduction of the quiescent supply current to 1.3 mA.