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关于PCM1808输入音频信号范围的问题

Other Parts Discussed in Thread: PCM1808

您好,请问PCM1808的datasheet中显示其单端输入电压为3VPP,请问我一般的音频输入,比如RCA输入电压,其电压范围一般能达到2Vrms,请问为了保证我出来的波形不失真,信号输入前我要怎么处理,要进行信号衰减吗?如果要,怎么处理,简单的分压还是怎么办?求教,不甚感谢