The EL8188 is a micropower precision op amp optimized for single supply operation at 5V and can operate down to 2.4V. The EL8188 draws minimal supply current while meeting excellent DC-accuracy, noise, and output drive specifications. Competing devices seriously degrade these parameters to achieve rail-to-rail operation and microamp supply current. Offset current, voltage and current noise, slew rate, and gain-bandwidth product are all 2X to 10X better than on previous micropower rail-to-rail op amps.