When I say digital, I refer to a CMOS counter (RC clock) to control a
multiplexer/demultiplexer IC to switch an analog signal. So only two
digital ICs.
"When doing ground layout i like to think in voltage drops"
You refer to traces voltage drops?
Adrian
--- In
Homebrew_PCBs@yahoogroups.com, "Stefan Trethan"
<stefan_trethan@...> wrote:
>
> Usually you have some sort of interface between digital and alalog,
like a
> AD converter. Then you will connect the grounds right at that
component.
> If you don't then right at the supply is fine. Power is not such a
problem
> as long as you decouple things well. You may need inductors as
additional
> filters for sensitive circuits, with caps both sides. The inductor
blocks
> ac as you know.
> When doing ground layout i like to think in voltage drops.
> ST