[En-Nut-Discussion] AD conversion resolution?

[Alexander Baranov]

I strongly support. Don't use internal Ref if you would like to avoid
calibration of each device.
----- Original Message ----- 
From: "Kathy Quinlan" <katinkad at kaqelectronics.dyndns.org>
To: "Ethernut User Chat (English)" <en-nut-discussion at egnite.de>
Sent: Thursday, December 15, 2005 9:57 AM
Subject: Re: [En-Nut-Discussion] AD conversion resolution?


> Gerwin Voorsluijs wrote:
>
> > Hi Kathy,
> >
> > You mean it could be noise? That would not explain why I don't see such
> > jumps on my voltmeter, nor does it explain why I see this behaviour over
> > a number of sweeps. Btw I use the internal reference voltage on the
> > Ethernut.
> >
> > In the mailing list I saw that you are also using the ADC function of
> > the Ethernut and I was wondering if you could look at the results you
> > are getting to see if maybe I'm unlucky and my Ethernut is broken?
> > I know that on the total range of the 10bit ADC (1024 values) a jump of
> > 50 is not that big (roughly 5% ), but for what I want to use it for, it
> > is vital.
> >
> > Cheers,
> >
> > Gerwin
> >
>
> You know that the internal ref is not accurate (or even close) a good
> external Vref is essential)
>
> I have had ALOT of problems with the internal ref, and now only use
> external ones.
>
> I would try to feed in an external Vref first.
>
> Regards,
>
> Kat.
>
>
> -- 
> No virus found in this outgoing message.
> Checked by AVG Free Edition.
> Version: 7.1.371 / Virus Database: 267.13.13/200 - Release Date:
14/12/2005
>
> _______________________________________________
> En-Nut-Discussion mailing list
> En-Nut-Discussion at egnite.de
> http://www.egnite.de/mailman/listinfo.cgi/en-nut-discussion
>
>