What is the output impedance of the ad9834?
According to the datasheet,
In the datasheet is written "high impedance courrent source". Not a value for the impedance.
A current source of this type doesn't directly imply a load value. But there is an output compliance number. You need to make sure you keep to that with the impedance you present to the DAC output (sort of working it backwards), if you want the DDS to meet its performance numbers.
It is a current steering DAC.
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