Analog Circuit Design Volume Three

Chapter 376

Closed loop control with data acquisition systems

Guy Hoover and William Rempfer

Abstract

The use of the LTC1090 series of data acquisition systems in process control loops is discussed.

Keywords

Data acquisition

closed loop control

LTC1090

Introduction

The use of microprocessors in process control loops is quite common. A processor-based control loop requires special design considerations as compared to traditional analog loops. Often a single centrally located processor will be used to control several remotely located processes. The outputs of the remote process sensors can be digitized at the sensor location and then be transmitted to the central processor. Unfortunately, transmitting digital signals typically requires ...