AVR-Chat

I am using an non AVR application that uses 2 dacs that go 0-5v. Does 
any AVR have dacs?

Lasse Madsen wrote:

> Hi
>
>
>>BTW, the built-in "Precision" ref is anything but... I'm running one
>>prototype board with a M128 who's 2.56V ref measures 2.783V!
>
> This is a common problem if you consult the datasheet you will see it 
> specified with a large variation making it "unusable" for anything 
> that requires precision I'm using the VCC through a RCL network and 
> this is more accurate.
>
>  
>
> Regards
>
> L. Madsen
>
>  
>
>  
>
> -----Original Message-----
> From: Bruce Parham [mailto:obparham@jpl.nasa.gov]
> Sent: 26. oktober 2004 18:27
> To: AVR-Chat@yahoogroups.com
> Subject: Re: [AVR-Chat] AVR with DAC?
>
>  
>
>
>
>> Do any of the AVRs have a programmable voltage reference?  I've gone
>> through some of the datasheets and it doesn't look like they do.
>>
>> Mike
>
> Not that I recall but, if you have an unused timer, you can put it into
> PWM mode and connect its output to the AREF pin via a suitable R-C
> filter.
>
> Bruce
>
>
>
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