I have seen multiple DS90UB901 and DS90UB902 units fail on my boards. I am interconnecting them across a 7m cable and the outputs seem to stop working after some time. I believe one or both of the signaling pair is being destroyed (EMI?). Replacing the IC's fixes the problem.
I am AC coupling on both ends of the cable at the IC pins. I do not have external termination resistors for the LVDS signal as the datasheet says they are internally terminated.
Is there a need for external clamping diodes or resistors?
Has anything similar been seen?