Re: [avr-gcc-list] ADC anomaly

[Douglas Dotson]

Good advice. Thanks!

Doug

--- Mattias Svensson <address@hidden> wrote:
> Douglas Dotson wrote:
> > All this is on a breadboard right now. When I 
> > layout the PCB, all the normal precautions will
> > be in place to keep noise to a minimum.
> 
> Never underestimate the noise capabilities of a
> breadboard... ;)
> 
> A PCB with proper AGND plane separated from DGND is
> the only possible 
> way. And you should have the AGND plane go under the
> corner of the 
> divice that has the ADC inputs.
> AGND and DGND should be linked in a star
> configuration, and only at one 
> point. Preferably at the place you have the main
> power input to the PCB.
> 
> Mattias S
> 
> 
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