Datasheet says the maximum voltage for the ADC external reference is VDDANA-0.6V, that is 2.7V if VDDANA=3.3V. Of course this maximum voltage applies to ADC inputs too.
What happens if the voltage (on ADC inputs o reference) is in the range [VDDANA-0.6V to VDDANA]? The ADC conversion will surely result in a all-ones value, but is there a risk to damage the device?
In other words, is this maximum value an absolute maximum rating?