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Impedance measuring with AD5933

Question asked by north on May 31, 2013
Latest reply on Jun 20, 2013 by juliana

Dear,

 

I want to use AD5933 for complex impedance measurement. According to application and circuit notes I found that appropriate circuit will be as shown below. 
My main doubts are:

- how to provide wide range value of unknown impedance: resistor Rfb should be variable to avoid internal AD saturation or what?

- Calibration: when I need to perform calibration, should I connect reSistor between outputs of AD8606 or directly between Vin and Vout?

 

Best regards

Mitar Simic

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