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CDC3S04: 供电疑问

Part Number: CDC3S04

      如上图所示,为CDC3S04的datasheet,输入为sin的时候,电源引脚VBATVDD_DIG以及VDD_ANA是否都是需要进行上电?如果VBAT进行悬空处理,芯片是否能够正常工作?谢谢。