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Impedance mesurement with AD5933

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north2012

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Hi all,

I want to use AD5933 for complex impedance measurement. Does anyone have experience related to this topic? Impedance will be in range 1 k to 1 M so there is no need for additional components which small impedance measurement requires.
My main doubt is how to provide wide range value of unknown impedance: resistor Rfb should be variable to avoid internal AD saturation or what?

Thanks in advance.
 

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

AD5933.jpg
 

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