With regards to the two very similar devices AD9915 (2.5GHz DDS) and AD9914 (3.5GHz DDS), I have noted that the AD9915 seems to have better specs than the AD9914 in some instances, but this could be because the specs are given at different frequencies (2.5 GHz vs 3.5 GHz).
The differences I noted in the datasheets are with regards to the following:
- Max frequencies
- frequency tuning resolution
- Supply current and power dissipation
- Data latency
I would like to know, if I were to use both devices at the same internal clock frequency (say 2.5 GHz), would their performance be exactly the same? Especially with regards to power dissipation.