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关于对ADC的spi接口进行隔离!

Other Parts Discussed in Thread: TXB0106

想采用数字隔离器进行adc的spi接口的隔离,有一些疑问:

adc的spi接口采用3.3V供电参考平面为DGND,处理器的spi接口也是3.3V,参考平面同样是pcb板子上的DGND,请问此时如何对上图的VCC1和VCC1进行统一3.3V供电,另外GND1和GND2如何接?连到一起接到DGND吗?