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LM211-Q1: What is the difference between LM211DR and LM211-Q1?

Takanori Yuzawa
Intellectual 1490 points
Part Number: LM211-Q1


Hi team

Could you let me know the difference between LM211DR and LM211-Q1? Are these same die? The difference is only test flow?
Even though my customer already evaluated LM211DR, they might need LM211-Q1 because of temperature range.

Best Regards
Takanori Yuzawa

  • 0
    TI__Guru 61996 points

    Hello Takanori-san,

    Electrically they are identical. However, the die rev and test programs are different.

    It is common for the "Q1" grade devices to have a different die. Very minor tweaks may be done for Q1 devices.

    In 99% of the cases, you will not notice a difference between the two. So if they tested with the commercial part, the "Q1" part should drop right in with little difference.

    Unless there is a specification that is being pushed to the limits, they should be identical. Though proper due-diligence would be to test a few devices to make sure there is not a critical difference.

  • 0 in reply to Paul Grohe
    TI__Intellectual 1490 points

    Hi Paul-san

    Does it mean that it is different only in the temperature range specified in specs?
    It's because the customer is considering that Tj is 150 degC for both, so it is almost the same in terms of reliability.

    Best Regards,
    Takanori Yuzawa

  • 0 in reply to Takanori Yuzawa
    TI__Guru 61996 points
    Hello Takanori-san,

    Yes. The electrical specs are the same. The difference is that "Q1" devices go through extended testing and manufacturing flows as required in the AEC-Q100 specification.

    The "Q1" grade 1 specification requires the extended -40 to +125C temperature range, so the "Q1" has the -40 to 125 range whereas the commercial (non-Q) version has the -40 to 85 range.

    Both have the 150°C abs max junction temperature. The "Q1" grade should actually be "more" reliable than the commercial due to the extended testing Q100 process....that's the whole idea of Q1!