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AD5933 design for unknown impedance

Question asked by Doungh on Aug 31, 2012
Latest reply on Sep 4, 2012 by BobC

Hi,

I'm investigating whether or not to use this chip for a particular project.

I want to use it to measure an impedance that can vary from 1k to 10M.

Can I achieve very accurate readings when using a constant value of Rfb or will I have to make a number of measurements refining Rfb with each one to achieve high accuracy. Accurate to with in 1 Ohm we shall say.

 

Has there been many other projects using this chip to investigate impedance values or is it more designed for observing impedance change.

 

Regards,

Ronan

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