MAXREFDES4#: 16Bit, 4 ~ 20mA Isolated Signal & Power

Summary

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 analog-to-digital converters (ADCs), in many cases, the resolution is not high enough and isolation is lacking.

The Campbell (MAXREFDES4#) subsystem reference design is a 16-bit high-accuracy industrial analog 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. The Campbell design integrates a precision low-noise buffer (MAX44250), a high-accuracy ADC (MAX11100), an ultra-high-precision 4.096V voltage reference (MAX6126), 600VRMS data isolation (MAX14850), and isolated/regulated 5V power rails (MAX256/MAX1659).

This AFE solution can be used in any application that needs high-accuracy analog-to-digital conversion, but it is mainly targeted for industrial sensors, industrial automation, process control, programmable logic controllers (PLCs), and medical applications.

Specifications

Manufacturer	Analog Devices Inc./Maxim Integrated
Category	Wired Communication
Sub-Category	Analog Front Ends (AFE)
Eval Board Part Number	MAXREFDES4#-ND
Eval Board Supplier	Analog Devices Inc./Maxim Integrated
Eval Board	Normally In Stock
Resolution (Bits)	16 Bit
Input Type	4 ~ 20mA 0.2 ~ 4.096V
Features	Isloated Power Isloated Signal
Component Count + Extras	54 + 13
Design Author	Maxim Integrated Products
Main I.C. Base Part	MAX11100 MAX14850 MAX1659 MAX256
Date Created By Author	2013-01
Date Added To Library	2013-04