EVAL-CN0349-PMDZ: Fully Isolated Conductivity Data Acquisition System

Summary

The circuit on EVAL-CN0349-PMDZ provides a complete, robust data acquisition solution for processing conductivity cell outputs, including temperature correction. This circuit is ideal for measuring the ionic content of liquids, water quality analysis, and chemical analysis.

This design solution is optimized for high precision and low cost, and it uses only five active devices. The circuit has a total error of less than 1% FSR after calibration. The small footprints of all the components make the circuit ideal for applications where printed circuit board (PCB) real estate is a premium. The digital output of the circuit is fully isolated; therefore, the ground loop interference is eliminated, making it ideal for harsh industrial environments.

Specifications

Manufacturer	Analog Devices Inc.
Category	Sensor Solutions
Sub-Category	Other Sensing Solutions
Eval Board Part Number	EVAL-CN0349-PMDZ-ND
Eval Board Supplier	Analog Devices Inc.
Eval Board	Normally In Stock
Purpose	Signal Conditioning
Range	0.025 ~ 200 mS/cm
Sensing Method	Conductivity Cell
Voltage In	3.3 V
Features	ADC's for Sensor Reading I²C Interface Isolated Power and Data Temperature Compensation
Design Author	Analog Devices
Component Count + Extras	39 + 6
Main I.C. Base Part	AD5934 AD8606 ADG715 ADUM1250 ADUM5000
Date Created By Author	2014-09
Date Added To Library	2018-03