If the ADG509F works with +/-20V power supply, is it OK to use 20V logic input
for the EN and A1,A2,A3?
The ADG508F will work with +/-20V supplies and under these conditions the
digital inputs can go between 0V and 20V. While we know the part operates as
expected when we set it up, we have no data to support that this is ok over the
lifetime of the part.