AVR-Chat

--- In AVR-Chat@yahoogroups.com, "Alexandre Guimaraes" <listas@l...> 
wrote:

> > > Yes, it is successive approximation, at something like 200 kHz.
> > You can go up to 1MHz if you only need 8 bit precision.
> That makes it even more interesting.... 

Just to clarify for anyone not reading the data sheet, these 
frequencies are the SAR clock rate. Conversion takes 13 cycles. So, 
the fastest sample rate is about 77 kHz. The input bandwidth is given 
as 38.5 kHz, which is exactly half this and should probably be taken 
with a pinch of salt. It would be wise to limit the bandwidth of any 
applied signal to this figure to avoid aliasing. I'm sure there are 
more severe restrictions if you're switching inputs.

Graham.

P.S. The above is actually from the ATmega16.