in order to reduce my BOM count in a current project, I would like to maximize the sampling time of the ADC. Thereby, I try to achieve that the output impedance of my temperature sensor is sufficient to drive the ADC sampling capacitor incl. analog bus capacitance.
What I already did:
1) Set ADC clock to SIRCDIV2_CLK (8 MHz)
2) Set ADC clock prescaler to 8
3) Set sample ticks to 255
This should result in a sample time of 256us.
Is there a way to further increase the sample time? E.g. using pretrigger and trigger?