clock excursion range 0.8v or 3.3v?

Hi mohammadsdtmnd 

Thank for using AD8285.

Kindly give some time for the product owner (C.Chang ) to look into this and provide their response.

In the meantime, please note that back-to-back Schottky diodes in transformer-coupled differential clock inputs are not unnecessary—they play a critical role in protecting the ADC, maintaining signal integrity, and ensuring compatibility with various clock sources.

Hi JAlipio 

Thank you kindly for your fast response, I know diodes like tvs protecting the line from over voltage. But datasheet told it supports 0 to 3.3 v. If clock sourced from connector that only is required to protect the line maybe. But I think that must not be a should when we drive it from 3.3v driver or differential drivers directly. Doesn't it?