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ADS8556: 关于芯片供电时序的问题

Part Number: ADS8556

在规格书中提到 “芯片没有严格的上电时序,然而HVDD不能早于AVDD”, 我想问的是:HVDD不能早于AVDD 这个不就是对上电时序有要求吗?还是应该怎么理解呢