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PCM1864: what's the RMS noise level for PCM1864

Tess Chen
Intellectual 2675 points
Part Number: PCM1864

Dear team,

I want to know the RMS noise level for PCM1864? I try to use the SNR parameter to calculate as screenshot below.

But I find from the figure below is about -140dB.

Could you guide me to find right way to get the RMS noise level for PCM1864? Thanks a lot.

Best Regards,

Tess Chen

  • 0
    TI__Genius 13610 points

    Hello Tess,

    Well SNR will give you relative signal to noise ratio of output when you use it whereas that FFT graph only shows the noise floor for the hardware itself separate from any other connected devices or signals.

    Best Regards,

    Carson