AVR-Chat

Not to be too picky, but since my last name is Loose, I like to see the word
used correctly. You "lose" accuracy - "loose" is an adjective. ;)

Erik


-----Original Message-----
From: Dave VanHorn [mailto:dvanhorn@dvanhorn.org]
Sent: Wednesday, September 01, 2004 11:04
To: AVR-Chat@yahoogroups.com; avr-chat@yahoogroups.com
Subject: Re: [AVR-Chat] Why use the ADC pre-scalar bits


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.





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