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DAC81402: Reset拉高后延时多久,可以正常配置寄存器并输出电压?

Part Number: DAC81402

从手册上可以看出Reset引脚拉高后1ms,即可开始配置寄存器并输出电压。

但实际情况却是Reset引脚拉高并等待12ms后,才能正确输出电压,请问这是什么原因?