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ADC32J44: Test Pattern issue

Di Wang
Expert 1740 points
Part Number: ADC32J44

Hi,

I'm setting Register 0Ah. When I set as 1001, it should be 0,2399, 8192, 13984, 16383, 13984, 8192, and 2399, but I get 0  3915  5537 3915  0  12468  10846  12468 . I want to know how to find the root cause.

Other pattern in Register 0Ah is fine.

Thanks

  • 0
    TI__Genius 12965 points
    Di Wang,

    Let me look into this. Are you obtaining this data using our HSDC Pro and FPGA capture platform?

    Ken.
  • 0 in reply to Ken C
    TI__Genius 12965 points
    Di Wang,

    This is a data sheet error that will be updated in a future datasheet update. The values should be
    14b sine: 8192, 4276, 2654, 4276, 8192, 12107, 13729, 12107 in offset binary codes (0 to 16383)

    If you are reading back the binary values in 2s complement (default format) the binary values will be (in decimal format)
    0, 3915, 5537, 3915, 0, 12468 (-3915), 10846 (-5538), 12468 (-3915).

    Ken