2.5.2 Internal ADC Reference Has Too Low Value

The internal ADC reference has a value lower than specified.

Work Around

Use AVCC or external reference
Measure the actual reference value by applying a known voltage to the ADC when using the internal reference. The result, when doing later conversions, can then be calibrated.

Affected Silicon Revisions


ATmega2560/2561
Rev. A	Rev. C	Rev. E	Rev. F
X	X	-	-

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