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28377S DAC基准源问题 28377S LanchuPad开发板

无论把基准源设置成REFERENCE_VDAC或REFERENCEVREF都需要把VDAC/ADCINB0连接到3.3V电源,DAC引脚才会有输出,否则为0V

这样是对的吗?按照我的想法,我把基准源设置成REFERENCEVREF,VDAC应该不需要供电也可以吧。

示例v210/buffdac_enable_cpu01

环境CCS 6.2.0+complier ver: TI v18.12.2.LTS

  • 您可以看一下例子内的说明

    //! When the DAC reference is set to VDAC, an external reference voltage
    //! must be applied to the VDAC pin. This can accomplished by connecting a
    //! jumper wire from 3.3V to ADCINB0 (HSEC pin 12).
  • 如果我不设置VDAC为基准源,选择VREFHI为基准源的话。VDAC引脚不供电也可以输出的吧?

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