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PCM5242: 产品实测SNR 低

Part Number: PCM5242

hi team,

产品设计:音源输入是从TIPCM5242RHB输出的,PCM5242手册上SNR120DB左右,可是最终产品(如下)的测试结果不理想。一般是什么原因,请帮忙建议