Direct Digital Synthesizer

[ali ghafoor]

how to measure output power of AD9915 theoretically... ?? how to extract output power information from datasheet specs??

 

[biff44]

I see what u mean, the data sheet is sparse on output power info. it does say that full scale current output is 20.48 ma, and the output impedance is 50 ohms. That leads me to think that the peak output power would be at +/- 10.24 mA into 50 ohms. Poutpk=I^2*R=7.688 milliwatts peak, or 5.4 milliwatts rms.

So practically, I would expect perhaps +3 dBm out, until I actually measured it.