Datasheet

253
8272E–AVR–04/2013
ATmega164A/PA/324A/PA/644A/PA/1284/P
Signal components higher than the Nyquist frequency (f
ADC
/2) should not be present for either
kind of channels, to avoid distortion from unpredictable signal convolution. The user is advised
to remove high frequency components with a low-pass filter before applying the signals as
inputs to the ADC.
Figure 23-8. Analog input circuitry.
ADCn
I
IH
1..100 kΩ
C
S/H
= 14 pF
V
CC
/2
I
IL