Has anybody used these?
We have two FPGAs on a board, a Zynq and an Artix7. We want to use the
internal ADCs to read chip temperatures. We have been advised to
ground the temp sense diode pins DXP and DXN "if they are not being
Unless the XADC has a separate temp sense diode, seems to me that
shorting the external diode pins might kill our ability to acquire
I don't see any big downside to not grounding those pins.
John Larkin Highland Technology, Inc
picosecond timing precision measurement
Why do you say it makes no sense? A lot of devices have an improved ESD
rating when their more sensitive pins are connected to low impedance
sources (as opposed to being open).
Of course, if those pins are on a via-less pad under a BGA on a PCB with
good planes, the difference may be hard to measure.
Of course not, but I do ground pins that the manufacturer says to ground.
Last century (using QFP packages) I would sometimes ground extra IO pins
to help with ground bounce on IO banks that had more O than I.