AVR-Chat

At 11:56 AM 9/1/2004, Craig Limber wrote:


>Hi there;
>
>I was just browsing the docs on the AVR ADC.  I was wondering if anyone
>could tell me why I would want to use a ADC prescalar other than 2 
>(the mimimum)?  Does it affect the accuracy or noise?  Thanks.

The adc clock has to be around 200-250kHz, or you loose accuracy.
How much you loose, or wether it even runs at all, depends on how far you push it.
I wouldn't push it out of spec without a very good reason, because they give no guidance on how badly things degrade outside the published limits.