Hello Ibtesam, Welcome to our forum and thank you for your post! Typically we see customers use something like a 1k, 1W resistor at the electrode inputs to the circuit. You will have to verify that this combination of resistance and power rating is sufficient to handle the expected high-voltage inputs and the clamping voltage used by your TVS diodes. I've found some other relevant posts on this topic: e2e.ti.com/.../2103740 https://e2e.ti.com/support/data-converters/f/73/p/176956/882080 Regards,
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