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Re: [avr-gcc-list] Troubles with ADC on ATMega16
From: |
Brian Dean |
Subject: |
Re: [avr-gcc-list] Troubles with ADC on ATMega16 |
Date: |
Thu, 8 May 2003 20:06:44 -0400 |
User-agent: |
Mutt/1.4i |
On Thu, May 08, 2003 at 11:02:21AM -0700, Keith Gudger wrote:
> I have found that I must wait about 30 us after switching the A/D input
> channel before starting the A/D converter. This allows the input to
> settle down. It all depends on your inputs - how much capacitance and
> resitance do they have?
>
> I saw the same results as you before I put in the delay.
I thought it was documented in the datasheet that you should throw
away the first conversion after switching channels? Did I just
imagine that somewhere?
Cheers,
-Brian
--
Brian Dean, address@hidden
BDMICRO - Maker of the MAVRIC ATmega128 Dev Board
http://www.bdmicro.com/