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[ADV7282-M] Do you have any recommended circuit to protect DIAG pin when power is not supplied?

Question asked by Tamu on Oct 23, 2015
Latest reply on Nov 9, 2015 by Tamu

Hello,

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.

 

Question 1:
Please refer attached file "protection_for_DIAG_pin.xlsx".

 

Question 2:
Do you have any recommended circuit to protect DIAG pin?

 

Thank you!
Best regards.

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