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Re: [AVR-Chat] Re: Using the ADC to measure the battery supply?

2007-06-19 by Jim Wagner

On Tue, 19 Jun 2007 19:35:43 -0000
 "Dave VanHorn" <microbrix@gmail.com> wrote:
> 
> > I'm still curious enough to experiment with this idea
> compared to my
> > typical OpAmp solution.
> 
> It may "work" on one unit, but if you can't handle the
> leakage allowed 
> in the spec without significant error, then you're in
> trouble.
> 
> Remember, you have to add this error to all the other
> sources of error 
> in the ADC measurement.
> 
> 


And Op-Amps have their own input "leakage".

Jim

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