Please select an appropriate mode according to the output impedance of the analog input source of your system.
When the output impedance is high;
if the sampling time is short, the internal sample & hold circuit may not get charged completely, which may cause a failure in obtaining an expected conversion accuracy.
Meanwhile, if the sampling time is long, the internal sample & hold circuit may not get charged sufficiently due to dynamic changes in the input voltage.
Please be sure to sufficiently check the sampling clocks with your system.
Number of sampling clocks in Normal 1 mode: 7 clocks (fAD)
Number of sampling clocks in Normal 2 mode: 5 clocks (fAD)