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OPA4991: OPA4991IRUCR pinout information

Taketo Sato
Genius 9475 points
Part Number: OPA4991
Other Parts Discussed in Thread: OPA2991

Hello team,

There is no X2QFN information in OPA4991 pin function table, datasheet pg.9.

I would like to confirm if X2QFN pin assignment is definitely correct as shown in figure5-10, datasheet pg.8.

  1. Is figure5-10 pin assignment information correct as X2QFN?
  2. Do you have a plan to update datasheet for adding X2QFN information in OPA4991 pin function table?

Best regards,

  • Former Member
    0 Former Member

    Hello Sato-san,

    I am a bit confused by the question.  The X2QFN package for this device is defined for the dual channel op amp, OPA2991.  The TI-name for this package is RUG.  The QFN for the quad-channel device, the OPA4991, is referred to in the data sheet as the WQFN with a TI-name of RUC.

    So, I would not expect there to be information for the X2QFN in the OPA4991 section of the data sheet.  Instead I would expect to see it in the OPA2291 section of the data sheet.

    Have I misunderstood your question?

    Regards,
    Daniel

  • 0 in reply to Former Member
    TI__Genius 9475 points

    Hello Daniel-san,

    Thank you for your comment.

    What I mean is 2mm x 2mm package of OPA4991 shown in below image. It should be 14-pin QFN and drawn in figure5-10. However OPA4991 pin function table in pg.9 doesn't have the 14-pin QFN package, but only 16-pin QFN.

    There is no pin function information in the table, so I wanted to confirm if we can really trust figure5-10 pin assignment.

    Best regards,

  • Former Member
    0 Former Member in reply to Taketo Sato

    Hello Sato-san,

    Ok.  I now see what the problem is.  Thank you very much for bringing this to our attention.  Yes, let me verify what is happening here.

    I will get back to you as soon as I can confirm the proper pinout.

    Regards,
    Daniel

  • Former Member
    0 Former Member in reply to Former Member

    Hello Sato-san,

    My apologies for the delay.  I will try to have a more firm update for you within the next 24 hours.

    Regards,
    Daniel

  • 0 in reply to Former Member
    TI__Genius 9475 points

    Hello Daniel-san,

    Thank you for your support. I will wait for your update.

    Best regards,

  • Former Member
    0 Former Member in reply to Taketo Sato

    Hello Sato-san,

    Thank you for your patience.

    I have confirmed the 14-pin pinout.  The one in the data sheet should be correct.  The missing pin section in the Pin Functions table will need to be put into place.

    Regards,
    Daniel