I am developing an energy metering system. At the moment I use the ADE7878 evaluation board with a
STM32 microcontroller. Currently I use the optocoupler on the ADE7878 board. I am at the point
that I have to think about designing a pcb.
In which case is is necessary to use a separated ground? Is it necessary for the precision of the ADE7878 that
I separate the voltage supply from the micro controller supply? Or is it only necessary because of safety reasons e.g.
if I connect the micro controller via USB to a computer?