ADM2795E in RS422 mode, DO0160G protection

Hi Ian,

I think you are talking about the 33 or 47 Ohm resistors mentioned in the ADM2795E-EP Datasheet and also in the Application Note 1468 (Lightning Protection for Communication Interfaces in Avionics Applications). I'm reporting both here for ease of reading:

https://www.analog.com/media/en/technical-documentation/data-sheets/ADM2795E-EP.pdf 

https://www.analog.com/media/en/technical-documentation/application-notes/an-1468.pdf

If so, my understanding is that the resistors should be used to pass the test even if the component is used as a receiver only.

Kind regards,

Andrea

Hi Andrea,

You're correct, I was referring to the ADM2795-EP datasheet and app note. It stands to reason the resistors are required for receive only mode, to absorb the energy. Was hoping to save PCB space, but surviving transients is more important so the resistors will remain.

I totally agree with you. Since the resistors are needed to protect the devices from transients caused by particular events such as lightning, they need to be used for all the components, such as both transmitters and receivers.

I think we can close the thread.

Good work and have a nice day!

Andrea

I totally agree with you. Since the resistors are needed to protect the devices from transients caused by particular events such as lightning, they need to be used for all the components, such as both transmitters and receivers.

I think we can close the thread.

Good work and have a nice day!

Andrea