An Alternative Chip for ADL5511

Hi,

 I am using ADL5511 to be an envelope detector to extract a very low-frequency signal ~0.3Hz  in a 50 kHz modulated signal. 

However, the power consumption of ADL5511 is large, I was wondering if anyone can provide information for an alternative chip?

I want to use it to be an envelope detector. The 50 kHz carrier signal was modulated by a 0.3 Hz signal, and I want to use the envelope detector to extract the 0.3 Hz signal.

Any suggestions will be really appreciated!

Thank you