2.5.4 Inaccurate ADC Conversion in Differential Mode with 200x Gain
With AVCC < 3.6V, random conversions will be inaccurate. The typical absolute accuracy may reach 64 LSBs.
Work Around
Use AVCC ≥ 3.6V.
Affected Silicon Revisions
| ATmega640 | |
|---|---|
| Rev. A | Rev. B |
| X | X |
| ATmega1280/1281 | |
| Rev. A | Rev. B |
| X | - |