The 1st board of rev 03 is assembled and works very well so far. SPI communication is established, the internal and on-board external temperature sensor are operational. And most important, the analog inputs and outputs seem to be happy. At least the ADC DAC settings with 0v to +10V voltage range.

With the internal voltage reference and my crappy multimeter looping back the DAC value into a ADC, I see the following results:

Looks decent, I am just not sure yet what happens at the top end of the range.