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Analog Input ESD and Surge protection

Question asked by Swaminath on Apr 29, 2017
Latest reply on May 12, 2017 by Jayas



I am using AD8418ABRMZ amplifier for low DC voltage measurement. Op-amp single Supply voltage is 3.3VDC .

I  want to add some protection circuit for ESD, transient and Surge voltages. I am planning to use TVS diodes/ varistor at the input pin of op-amp. Suggest best TVS diode or varistor for the same.

Which is good whether TVD diode or varistor and how to select it ?