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LMH0303: Suitable Component for ADS Simulation with IBIS Model

Diego Shinji Kawaguchi
Prodigy 130 points
Part Number: LMH0303

Tool/software:

Dear Team,

I am currently facing an issue when attempting to configure the lmh0303sq.ibs file within the ADS simulation software.

Specifically, when I try to set it to IBIS_DIO/DO/IO, I receive the following error message:

No pin has been selected.

Please specify a different IBIS file if necessary and select a pin on the 'Pin' tab.

Simulation errors will occur if left unchanged.

The model name cannot be determined.

Please select a different pin on the 'Pin' tab.

Simulation errors will occur if left unchanged.

 

Could you please provide guidance on which component or specific settings should be selected to accurately simulate the lmh0303sq.ibs model in ADS?

Additionally, if there are any known configurations or parameters that might need adjustment to resolve this issue, I would greatly appreciate your advice.

Thank you for your assistance.

I look forward to your response.

Best Regards,

Diego

  • 0
    TI__Expert 7470 points

    Hi Diego, 

    Set the IBIS model to be an IBIS_DI or an IBIS generic component.

    Best Regards,

    Nick

  • 0 in reply to Nick Peabody
    Prodigy 130 points

    Hi Nick,

    Thank you for your response.

    I tried setting the IBIS model to an IBIS generic component as suggested, and I noticed that the IBIS_DOPENSINK was automatically selected.
    That resolved part of the issue.

    However, I have an additional question.
    I have further observed that when I select sdo_fast_diff_output in the Model Selector for the IBIS PIN settings, the simulation runs without any issues.
    But, when I select sdo_slow_diff_output, I encounter unusual waveforms in the output, and I also see a Worning related to sdo_slow_diff_output.

    It appears that the issue might be linked to the voltage values specified within the IBIS model.

    I would greatly appreciate your assistance in resolving the error and adjusting the IBIS model so that the correct waveform is generated.

    Your support on this matter would be very helpful.

    Best Regards,
    Diego

  • 0 in reply to Diego Shinji Kawaguchi
    TI__Expert 7470 points

    Hi Diego,

    I will replicate your diagram in ADS and get back to you later this week with my comments.

    Best Regards,

    Nick

  • 0 in reply to Nick Peabody
    TI__Expert 7470 points

    Hi Diego,

    I looked at this and I have a few updates;

    1. The error does not appear to be causing the issue. I see the same error and I do not see any other customer issues with that error preventing development.
    2. The LMH0303 has a 100 ohm differential input
      1. In the diagram you have above, the output of the signal generator is 75 ohms. I do not know if that is the root cause of the issue, it would be helpful if you can investigate that on your side.
    3. IBIS_DOPENSINK versus IBIS_DI
      1. Can you try your same schematic using IBIS_DI model?

    Best Regards,

    Nick

  • 0 in reply to Nick Peabody
    TI__Expert 7470 points

    Hi Diego,

    I'm going to close this thread due to inactivity. Feel free to re-open the thread.

    Best,

    Nick