Я ни черта не помню, но вот в копилку: A Technical Tutorial on Digital Signal Synthesis. 1999. Analog Devices.
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Section 4.
The DDS Output Spectrum
The effect of DAC resolution on spurious performance
The effect of oversampling on spurious performance
The effect of truncating the phase accumulator on spurious performance
Additional DDS Spur sources
Wideband spur performance
Narrowband spur performance
Predicting and exploiting spur "sweet spots" in a DDS' tuning range
Jitter and phase noise considerations in a DDS system
Output filtering considerations
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Section 6.
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FS output current range and tradeoffs vs. spur performance
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DDS_theory_and_some_basics_DSP_AD.pdf