We are using the HSDC port of ADE7878 in order to acquire samples for a 50hz signal. We do our own FFT calculus with these samples and we obtain the fundamental values. Everything works fine.
Now, due to a new client, we need to do the same but with a 60Hz signal. I know that the sampling rate of ade7879 is 8KSPS, and this rate works fine with 50Hz but not with 60Hz, so we cannot do the FFT calculus for a 60Hz signal. However, the ade7878 has a frequency setting (for 50Hz or 60HZ), I would like to Know how the ade7878 do the rms calculus for 60 Hz if the sampling rate is not a multiple of 60Hz.
If there is no possibility to use the samples of ade7878 for doing a 60Hz FFT. Is there any IC in the Analog portfolio just to obtain samples by an HSDC por at a sampling rate multiple of 60Hz. I have not find any. The HSDC port is perfect for our pourposes because we collect the samples automatically in the DMA through the SPI interface of our microcontroller.