I am interested in using this chip to measure active and reactive power, rms values and phase between two sinusoidal signals. Unfortunately this IC is only specified for a narrow frequency band (50-60Hz), whereas my signals could probably be some higher (let's say 300 or 400 Hz).
Do you think it's possible, and could you estimate the error increase in case it is?
Otherwise, do you know a better suited (and possibly in the same magnitude of cost :-) ) chip?
Thanks in advance