schematic review

Question

Hi guys, 
 
 i would need a review of the attacched schematics. 
 It is a 3 wire delta service. 
 PDF 
 could someone kindly check it? 
 
 Thanks

jnaso · Accepted Answer

Hi, 
 One suggestion would be reducing the component count, saving PCB area, and improving SPI data rates with standard digital isolators. I wasn't able to find a datasheet for the opto in the schematic, but that tech will likely not allow the design to make use of the 10 MHz SPI clock the ADE9078 supports. The long propagation delays tend to slow the SPI clock down considerably. 
 EVAL-ADE9078 demonstrates isolation with the ADuM3150. ADuM341E for MOSI, MSO, SCK and CS and ADuM320N for IRQ0b and IRQ1b. 
 Regards, 
 Jason)

CClaudio · Answer

Hi Jason, 
 
 thanks for the suggestion about isolation, 
 i'll check and if will be necessary i'll redesign the SPI circuit. 
 What about the choice to share the same GND with another ADC? 
 Could generate some issue? 
 
 Thanks.

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schematic review