[Icc-avr] ADC Differential input

[BobGardner at aol.com]

I wondered about that too. Datasheet says they dont test diff mode in 40  pin 
dip package. I havent been able to get it to work. When using gain of 10 or  
200, I think the dc component must be 1/10th or 1/200th of vref.... it  
amplifies, then subtracts the amplified signals... so it is very easy to 'clip'  if 
dc level is > 0.5V
 
 
In a message dated 4/30/2008 8:52:11 P.M. Eastern Daylight Time,  
sbissonnette at microsyl.com writes:

Hi,
 
    That's the first time I have  to use the differential input on a AVR and 
my question is
if I chose the value 01000 in the MUX register  it's written 
Posisive Diff Input : ADC0
Negative Diff Input : ADC0
 
I don't understand why it's the same  input?
 
Thanks
Sylvain  Bissonnette


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