Atmega ADC

[Fuzesi Arnold]

Vajon mi lehet az oka, hogy 1x-es erosites eseten csak 8 bitet tud az
ADC-juk az adatlap szerint?
Ennyire zajos?

Two of the differen-tial
inputs (ADC1, ADC0 and ADC3, ADC2) are equipped with a programmable gain
stage, providing amplification steps of 0 dB (1x), 20 dB (10x), or 46 dB
(200x) on the dif-ferential
input voltage before the A/D conversion. Seven differential analog input
channels share a common negative terminal (ADC1), while any other ADC input
can be
selected as the positive input terminal. If 1x or 10x gain is used, 8-bit
resolution can be
expected. If 200x gain is used, 7-bit resolution can be expected.

Arnold