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Campbell: 16bit 4-20mA input isolated AFE

Posted: 17 Apr 2013     Print Version  Bookmark and Share

Keywords:industrial control  data converters  analogue front end 

In industrial control and industrial automation applications, high-resolution data converters are often required. Although today's field programmable gate arrays (FPGAs) and microcontrollers may integrate analogue-to-digital converters (ADCs), in many cases, the resolution is not high enough and isolation is lacking. The Campbell (MAXREFDES4#) sub-system reference design is a 16bit high-accuracy industrial analogue front end (AFE) that accepts a 4–20mA current loop or a 0.2V to 4.096V voltage input signal, and features isolated power and data—all integrated into a small form factor.

This document explains how the Campbell (MAXREFDES4#) sub-system reference design meets the higher resolution and isolation needs of industrial control and industrial automation applications. Hardware and firmware design files as well as FFTs and histograms from lab measurements are provided.

View the PDF document for more information.

Originally published by Maxim Integrated Products Inc. at as "Campbell (MAXREFDES4#): 16bit High-Accuracy 4-20mA Input Isolated Analog Front End (AFE)".

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