Frequently Asked Question
What are the benefits and disadvantages of of using a single-ended vs. differential DDS DAC output?
Due to common-mode clock spurs, both spurious and harmonic suppression are best achieved when both Iout and /Iout outputs are terminated equally. Failure to do so may not be noticed at lower frequencies, but at higher output frequencies, where every dB of SFDR (spurious-free dynamic range) counts, this practice will give a cleaner output spectrum, lower spurs, and higher SFDR. This practice is especially applicable to situations where only one of the outputs is utilized.