About AD737

Hi there.

I have a small question about AD737.

http://www.analog.com/static/imported-files/data_sheets/AD737.pdf

This is my first time to use this device.

So I just wondered if there are any lmitations in case the input signal is a low frequency such as 1Hz, 0.1Hz...and amlost DC.

I would like to detect the rms level of  a low frequcny signal.

Thanks in advance.

Best regards,

Tarzan