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pcm5242左右声道输出的电压值不一致。

Other Parts Discussed in Thread: PCM5242

经过i2s让PCM5242左右声道输出一样的电压值,但是实际测量,例如设置输出5mv的电压,但是实际测量左声道输出电压为5.4mV(测量OUTLP和OUTLN之间的电压),右声道为4.4mV(测量OUTRP和OUTRN之间的电压),同时OUTLP对GND的电压和OUTLN对GND的电压也不一样,这是什么原因导致的?是芯片本身的原因还是我设计问题?