39.3.3 Rev. C

– External capacitor on AREF pin

1.) External capacitor on AREF pin

If an external capacitor is used on the analog reference pin (AREF), it should be equal to or larger than 100nF. Smaller capacitor value can make the AREF buffer unstable with large ringing which will reduce the accuracy of the ADC.

Problem Fix/Workaround

None.