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AD8428 Electrode interface

Question asked by viewgsm on Nov 8, 2016
Latest reply on Feb 16, 2017 by christoliver

Hi,

 

I am trying to replace op-amp with an AD8428 in-amp, it will be connected to two electrodes that there impedance change when a  particle passes between them, the current design excite the electrodes using 100V DC and capture the drop in voltage through 1 uf cap, the voltage drop is that case is around 1mV  I was hoping to reduce the needed excitation voltage as the AD8428 has a gain of 2000.

 

Thank you

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