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?