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关于TAS2552测量扬声器电压和电流问题?

Other Parts Discussed in Thread: TAS2552

通过DSP通过I2S将音乐信号通过Din传输给TAS2552,然后在输出到OUT+-端播放音乐,同时在Dout端是不是返回来的扬声器的电压和电流信息?我这么理解对不对?
  如果不对,那么扬声器电压和电流信息在哪里获取?贵公司提供的芯片资料好像并没有注明。而且返回的数字信号我该怎么转成模拟信号?