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Original question:

SN55LVCP22-SP: Current draw vs operating conditions

SN55LVCP22-SP: WCA help

Michael T Schneider
Expert 3790 points
Part Number: SN55LVCP22-SP

Team, 

Working through some WCA at one of my designs and was hoping you could help me get the below information clarified. 

  1. There is a spec for both peak-to-peak jitter and random jitter rms. Is this peak-to-peak jitter from additive noise assuming a BER or is it deterministic noise? Or both? Can you provide details for this characteristic?
  2. If this has a deterministic jitter element, under what conditions (switching?) is this being used?
  3. What is the bandwidth for the jitter measurements and specs?
  4. Can you provide PSRR data for this device?
  5. Is there a preferred DC decoupling/filtering circuit for this device?
  6. Can the device be driven with a sinusoidal input? If so, are there SR and amplitude requirements?

  • 0
    TI__Guru 62930 points

    Michael,

    1) This data was taken using a clock source for the two 500Mhz tests.  The 1000Mbps is using PRBS2^23-1.

    It was noted that at DCA-J86100C was used for the data analysis.  It was not noted on the statistical BER setting.  Typically during this time frame it was 1E-12 that was used for BER.

    2) The input conditions are listed in the table. As noted, the two tests listed with Mhz were clock sources, the other PRBS.

    3) Unfortunately, I did not find this information.  I can further research the capability of the DCA-J86100C if that will be helpful.

    4) We do not have PSRR data for this device.

    5) The decoupling used for the EVM can be used for reference.  See users guide here:

    6) I have not seen any information that would preclude operation using sinusoidal input.   The Input Electrical Characteristics table must be used for the input conditions.  It specifies positive, negative switching thresholds, hysteresis and common mode.

    Regards,

    Wade