RE: [avr-gcc-list] ATmega16 ADC at High Clock Rates

[Dave Hansen]

From: User Tomdean <address@hidden>
[...]
> The ATmega16 datasheet states, in part,
[...]
>   resoultion.  If a lower resolution than 10 bits is needed, the input
>   clock frequency to the ADC can be higher than 200 kHz to get a
>   higher sample rate.
>
> The datasheet does not specify the reduction in resolution due to a
> higher clock rate.
>
> Before I measure, does anyone know the reduction in resoultion, say,
> at 1 mHz?  2 mHz?

Table 122 on page 295 of my ATmega16 datasheet gives a typical absolute 
accuracy of 3 LSb, maximum of 4, at 1 MHz.  It also give 1MHz as the maximum 
ADC clock frequency.  No numbers are given for 2 MHz.

Regards,
  -=Dave