I am using x1 ADM3251E and x1 ADM2587E devices to connect to my micro controller which proides a RS232 and RS-485/RS-422 interface to external hardware. I am short of pins on my IO connector which carry the ADM3251E and ADM2587E signals -
ADM3251E - TX, RX, GND
ADM2587E - TX Hi, TX LO, RX Hi, RX LO, GND
Is it possible to share the same gnd between these devices?
If you refer to the part datasheets, then:
For the ADM2587E (page 7) when you are stating GND - do you mean GND2?
For the ADM3251E (page 8) when you are stating GND - do you mean GNDiso?
If both parts share the same isolated ground then that is ok.
i.e. Ground 2 and GNDiso sharing then the same ground connection.