[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [avr-gcc-list] ADC Internal Voltage Reference accuracy.
From: |
E. Weddington |
Subject: |
Re: [avr-gcc-list] ADC Internal Voltage Reference accuracy. |
Date: |
Fri, 13 Feb 2004 15:00:03 -0700 |
On 13 Feb 2004 at 13:45, Douglas Dotson wrote:
> 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.
It's been my experience, at least on the mega128, that the internal voltage
reference for the ADC is not very accurate. IMHO, I would suggest using an
external reference that is known to be accurate and stable.
HTH