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  • TI Thinks Resolved

IBIS Model Issue

Prodigy 20 points
HARIKRISHNAN I

Replies: 3

Views: 408

Dear Sir,


WE are doing SI Analysis for our PCB. We are using SN65LVDT386ADBT, SN65LVDT388A,
SN65LVDT390.

IBIS model for these 3 parts does not include 100E internal termination.
Please confirm on this whether we need to provide 100E external 100E resistor
termination.

Thanks and Regards
Prodigy 20 points
HARIKRISHNAN I
  • Intellectual 2090 points
    Eric Kim- DSS

    Hello Harikrishnan, 

    Based on our model review, the interanl resistor was not implemented in the IBIS model. It is recommended that user implement an external resistor.

    Regards,

    -Eric Kim (WEBENCH Design Center)

  • Prodigy 20 points
    HARIKRISHNAN I

    In reply to Eric Kim- DSS:

    hi sir,

    But the LVDT receiver chips will be having resistor termination inside the chip right?

  • Intellectual 2090 points
    Eric Kim- DSS

    In reply to HARIKRISHNAN I:

    Hello Harikrishnan,

    Yes, that is correct. The chip has internal on-chip termination. However, the model which was developed  ~13yrs ago doesn't have the termination incorporated. So it is recommended that user implement an external resistor for proper simulation result.

    Regards,

    -Eric Kim (WEBENCH Design Center)

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