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各位大佬，请教个问题。使用了官方给的PCM1808的光绘文件做了demo板，把模拟输入L/R通过电容短接到GND。此时测量SDOUT管脚有波形，所以采集到SOC就会有些噪音。给的输入DC是5.09V，电源纹波是23mv;LDO输出的3.3V的纹波是20mv;测量VREF电压是2.534V,L声道上电压是2.518,R声道上电压是2.515V.
