Va引脚为什么要输入模拟电压?
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手册第二页
Va是模拟电源
Analog Power Supply Input. A voltage source between 2.7V and 5.5V must be applied to VA this input. VA must be decoupled to GND with a ceramic capacitor value of 0.1 μF in parallel with a bulk capacitor value of 1.0 μF to 10 μF.