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Lpc2000

Index last updated: 2026-04-28 23:31 UTC

Message

Re: ADC leakage current followup

2006-03-08 by Sutton Mehaffey

Good idea.  I'll post any results from that avenue.  Thanks.

Sutton


--- In lpc2000@yahoogroups.com, Tom Walsh <tom@...> wrote:
>
> Sutton Mehaffey wrote:
> 
> >Tom,
> >
> >Since Philips isn't responding / hasn't responded to my ADC leakage
> >question, as you said would probably happen, is it safe to say the
> >leakage at the AD0 channels is probably 4ua max?  If so, I may put in
> >extra circuitry to handle to slop in measuring battery voltage, or I
> >may just add another ADC to my board.  I had an ADC on an 8051 project
> >and it worked great.  I just thought that an onboard ADC would
> >eliminate extra parts.  Maybe not...
> >
> >  
> >
> I really couldn't say, the spec sheet just is that vague.  My board is 
> only measuring the voltage drop across a 3.3K resistor.  They are being 
> used for EOL Burg (security) Zones. 
> 
> The only thing I would suggest is to get in contact with the Field Rep 
> for Philips and put the question to them.  They have to get you an 
> answer of some kind, that is their job to support engineers designing 
> with the hardware.
> 
> TomW
> 
> 
> 
> -- 
> Tom Walsh - WN3L - Embedded Systems Consultant
> http://openhardware.net, http://cyberiansoftware.com
> "Windows? No thanks, I have work to do..."
> ----------------------------------------------------
>

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