[En-Nut-Discussion] AD conversion resolution?

[Ole Reinhardt]

Hi,

> Maybe I didn't make myself clear, but I don't need to know if the ADC is 
> linear or not, I want to know why I don't get certain values when I'm 
> sure they have to be in there (voltage is very slowly varying!) Consider 
> the following short int values that are in my data (and their binary 
> counterparts): isn't it odd that there is no values in the range 
> 256-303? That was btw the way I noticed there was something wrong: the 
> value would stay on 255 for a very long time while I was doing my 
> voltage sweep.

You'r doing you voltage sweep with a poti? This looks like a problem
with the poti and / or influences from e-contermination of your
workplace. Plase try a well grounded voltage ramp generator or something
similar.

Bye,

Ole


-- 
kernel concepts    Tel: +49-271-771091-14
Dreisbachstr. 24   Fax: +49-271-771091-19
D-57250 Netphen    E+ : +49-177-7420433
--