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PCM1808-Q1: Behavior when exceeding analog input voltage range

Yuta Kurimoto
Expert 8840 points
Part Number: PCM1808-Q1

Hello Team,

Thanks for your support

I got question from customer about the behavior when exceeding the recommended operating condition of the analog input voltage range(2.93Vpp~3.23Vpp).

As I searched past E2E answer, I found below answer. Could you teach the detail of the meaning "Overflow"?

"The maximum input this device can accept without overflow or distortion in the digital output is the Full-scale voltage"

Thanks,

Yuta Kurimoto

  • 0
    TI__Guru 62625 points

    Hi Yuta,

    When the analog input voltage rises above the full-scale input voltage of the particular device, then there will be distortion because the digital output will begin to "clip" or saturate to the full-scale levels at the peaks and valleys of the sine-wave.

    The full-scale analog input voltage will range from:  0.58*VCC to 0.65*VCC volts peak-to-peak.

    Damage will not occur unless the input voltage surpasses the limits stated in the absolute maximum ratings table in the datasheet.