If I use ADE7953 for poly phase ,
Can I use 1 Crystal oscillator for all 3 ADE7953 ? They can sync clock?
How to read Voltage phase angel between each phase?
anything I should be careful when use ADE7953 for poly phase meter?
In the schematic, the VN pin should be connected to IN pin in all the ADE7953 ICs. Otherwise, a big common mode voltage will appear at the voltage ADC. And to read the phase angle between different voltages, you can read the instantaneous value of the voltage from each phase and measure the time between zero-crossings.
For the question concerning crystal usage, a single crystal can be used for more than one IC. But in that case, you may have to use a buffer.
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