Development of an AD5933-based Impedance Meter Prototype for Impedimetric Sensor Applications

This paper summarizes the progress done on the development of an impedance meter prototype. The prototype is to be a substitute for commercial equipment in reading impedimetric sensor for future portable applications. The prototype allows the impedimetric sensor to be excited with a frequency from 0.1-20kHz. Autolab's “Dummy Cell 2” has been used as the Device under Test (DUT). The DUT's phase response to AD5933 Evaluation Board and Hioki IM3590 Chemical Impedance analyzer in the range of 0.1-20kHz has been recorded and analyzed. It was found that the R-squared values of the regression lines were above 0.9 which indicates that AD5933 measurement is comparable to commercial equipment and suitable for impedimetric sensor application.