Uno Reference Voltage of 1.1v

dhenry:

Vint Internal Voltage Ref Min 1.0 Typical 1.1 Max 1.2

Not sure what those Atmel guys were thinking when they designed that sucker.

Well to me that spec is giving the nominal band-gap voltage allowable range for any specific chip you might obtain, not the stablity spec of the band-gap voltage which is not specified in the datasheet. It's been my first hand observation that the band-gap voltage is very stable, just different nominal values for different chips.

Lefty