Re: gEDA-user: Connecting AGND with GND

[Steve Meier <smeier@xxxxxxxxxxxxxxxxxxx>]

Take a look at your data sheet for the ADC often these devices will
require both analog and digiital ground and often they will recomend you
connect the two grounds close to them. Second I try to keep the digital
ground away from the analog sections. Third try to avoid traces
(requiring impedence matching) crossing over moats. 

I have been using surface mount power inductors to connect the two
grounds. e.g coilcraft  SLC7530

Steve Meier

Stefan Salewski wrote:
> Hello,
>
> I have a net called AGND for sensitive analog signals, and one net GND
> for general purpose.
>
> Of course I have to connect these two nets (at one single, central
> point).
>
> Nets AGND and GND should be really different nets, because this will
> help me when I do the board layout (will ensure connection at one
> single, central point).
>
> So I have connected AGND and GND symbols with a resistor symbol in
> schematic, with zero OHMs and small SMD footprint.
>
> Is there a better way, i.e. substitution for this zero Ohm resistor?
> I think a footprint with two very small, overlapping pads may be an
> improvement?
>
> Best regards
>
> Stefan Salewski
>
>
>
>
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>
>   



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