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Do we have to connect AGND and DGND of ADE7953 together?

Question asked by cmathew on Mar 26, 2016
Latest reply on Mar 28, 2016 by dave.smith

I am working on the single phase multi-function IC ADE7953. In the datasheet, it is recommended that the analog ground (AGND) and the digital ground (DGND) be connected at the base pad of the chip.

 

I have an isolated power supply giving 3.3V to the circuit. The digital ground (DGND) is obtained from this isolated power

supply. The AGND is obtained from the high voltage (230V) circuit. If I connect AGND and DGND together, I lose the

isolation. So, is it really necessary to connect AGND and DGND together?

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