AN884

AN884 Driving Capacitive Loads With Op Amps Author: Kumen Blake Microchip Technology Inc. INTRODUCTION Overview Operational amplifiers (op amps) that drive large capacitive loads may produce undesired results. This application note discusses these potential problems. It also offers simple, practical solutions to each of these problems. The circuit descriptions and mathematics are kept to a minimum, with emphasis on understanding rather than completeness. Simple models of op amp behavior help achieve these goals. Simple equations are included to help connect circuit design to overall circuit behavior. Simple examples illustrate the concepts discussed. They give concrete results that can be used to better understand the theory. They are also practical to help develop a feel for real world designs. Purpose This application note is for circuit designers using op amps that drive capacitive loads. It assumes only a basic understanding of circuit analysis. This application note has the goal...