I would like to find out what is maximum recommended source impedance for A/D converter on Atmel SAM3X8E ARM Cortex-M3 microcontroller.
I tried to follow the example of this excellent answer, which also explained the maximum recommended source impedance for Atmel AVR 328P MCU (being < 10k). There are even quotes from datasheet in the linked topic, giving this answer specifically. Therefore I also checked the Atmel SAM3X datasheet, hoping to find this information. But I had no luck spotting the answer from page 1317 onwards, which deal with ADC.
I might add that I intend to use 12 bit resolution capability of the ADC.
How should I be searching for this information and where to find it?