The ADUM3401 indeed solved the issue. Thanks Dave
We recommend referencing the input circuitry to the isolated Analog ground. See this post for more information:
You might also consider a 4-channel digital isolator for the SPI interface as an…
Q1. I have no idea how to control IRQ1 pin of P2 connector to communicate. Is this pin must needed to communicate?
IRQx are output pins and ADE9000 are used them to report interrupts (like overcurrent event). They are not necessary for the SPI communication…