Hi - I have a PC720 with FMC125 and FMC122 mezzanine cards. I've added extra cooling fans to blow down between the cards, and according to the FMC temperature monitors, I see temperatures of about 47 C ("external") and 69 C ("internal") on the FMC125 (the FMC122 runs cooler).
The e2V digitizer is rated for Tambient of 0 - 70 C. I assume that this means that the chip temperature can exceed this (the Tjunction is rated to 125 C) - does this sound correct? What do you consider a safe range for the chip temperature?
To get the digitizer any cooler than it is (while not in standby), I think it would be necessary to add a heatsink, as the airflow is quite good now.