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TLV320AIC3101芯片单端输入信号RMS最大值是多少?

Other Parts Discussed in Thread: TLV320AIC3101

TLV320AIC3101芯片手册单端输入信号的RMS值为0.707v, 单端输出信号的RMS值为0.707v。为什么我实际用1k的正弦波作为输入信号,当正弦波输入信号的RMS值为0.640v是,DA单端输出信号的达到0.707v;输入信号的RMS值为0.707v时,DA输出信号正弦波已经削顶失真。有谁实际测量过3101芯片的输入信号RMS最大值呢?

  • 您好,

    TLV320AIC3101的DAC单端输出信号的满量程输出电压就是0.707V。‘‘当正弦波输入信号的RMS值为0.640v是,DA单端输出信号的达到0.707v;输入信号的RMS值为0.707v时,DA输出信号正弦波已经削顶失真。’’这个现象如果增益设置的一样,输出削顶是正常的。

  • 您好!我的意思是ADC输入信号的rms值为0.64V时,我在主芯片内存里获得的数据最大值已经到16位的最大值(32768),然后我将这些数据通过DAC输出,DAC输出的rms值已经到0.707V,ADC、DAC的增益我全部设成0dB。也就是说ADC输入的信号范围只到0.64V,不能到0.707V。