I have questions about ABSOLUTE MAXIMUM RATINGS of DIAG pin of ADV7282-M.
I think ABSOLUTE MAXIMUM RATINGS of DIAG pin is as follows:
Analog Inputs to Ground GND − 0.3 V to AVDD + 0.3 V
So I think DIAG pin can not be allowed to input over 0.3V signal without AVDD power supply.
In this case, my customer supposes a case that 1.6V may input to DIAG pin in accident without power supply on their system.
So he is considering the protection circuit for that.
Please refer attached file "protection_for_DIAG_pin.xlsx".
Do you have any recommended circuit to protect DIAG pin?