Re: AW: [avr-gcc-list] ADC Internal Voltage Reference accuracy.

[Douglas Dotson]

Interesting definition of a voltage reference :)
Does explain some strange behavior while calibrating
though.

Doug

--- Fabian Braun <address@hidden> wrote:
> As you can read in the datasheet on page 291
> (VINT Internal Voltage Reference min:2.3 typ:2.56
> max:2.7 V)
> If you think that's accurate enough, use it,
> sure it depends on the application you're using the
> adc for. But for a 10bit adc this reference isn't
> very
> good!
> 
> /FaB
> 
> -----Ursprüngliche Nachricht-----
> Von: address@hidden
> [mailto:address@hidden Im
> Auftrag von Douglas Dotson
> Gesendet: Freitag, 13. Februar 2004 22:46
> An: address@hidden
> Betreff: [avr-gcc-list] ADC Internal Voltage
> Reference accuracy.
> 
> I am using a Mega32 ADC using the internal 2.56v
> voltage reference. I'm not convinced that it is
> providing 2.56v. It appears that I can measure
> the voltage at the Vref pin. If so, it measures
> 2.464v. I can connect an external reference but
> I would to use the internal one as long it is 
> accurate enough.
> 
> Thanks!
> Doug
> 
> 
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