Hi Wiotte Fabrice,
Figure 59 of the AD9852 datasheet shows the supply current consumption of AD9852 for 2 configurations.
Figure 60 shows current consumption by each four function:
- Control DAC
- output scaling multiplier
- comparator
- inverse sinc filter
If it is okay for you to reduce sample rate, then that would also save a lot of power. Say if you only need max fout of 75MHz, 188MHz sampling clock would be ok. 75MHz is 40% of 188MHz.
Running the supply voltage down to the minimum setting would also help.
Please let me know if that helps.
-Sitti