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ADuC7121 evaluation board - IDACs are not working properly - why?

Question asked by MikeL Employee on Oct 24, 2012
Latest reply on Oct 24, 2012 by MikeL

On my ADuC7121 evaluation board, i am not able to achieve the datasheet specifications for the IDACs.

When I look at the IDAC output pins with an oscilloscpe, i am seeing an oscillation of +/-100mV at a frequency of ~25khz.

What is causing this?