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OPA541: Is the footprint correct?

MASAO KAIZUKA
Prodigy 40 points
Part Number: OPA541

I designed an amplifier board with OPA541 footprint from TI.

This footprint indicates the TAB and mold-body on the pin array of No.1 to No.11(odd only) and I placed parts accordingly.

However, after I got the parts and PCB board, I found that the footprint is wrong!

It is unbelievable happening, isn't it?

 

  • 0
    TI__Guru* 93105 points

    Kaizuka-san,

    We need to figure out where the problem resides. Did you download the OPA541AP TO-220 (KV) footprint information from the TI web page and use the .stp file?

    http://www.ti.com/product/OPA541/pinout-quality

    I don't have software that can open that file so I don't know what it shows. Can you provide an image of what it shows?

    The datasheet shows the OPA541 pin out and the footprint should comply with it.

    Regards, Thomas

    Precision Amplifiers Applications Engineering

  • 0 in reply to Thomas Kuehl
    Prodigy 40 points

    Dear Thomas-san,

    The file I downloaded was *.bxl file.  The file you mentioned is 3D-CAD file, which shows the 3D figure of this parts.
    The image is shown below.


    I downloaded OPA541_KV_11.bxl and converted to CAD file by using UltraLibrarian.
    Below is the screen shot of UltraLicrarian.



    And generated footprint is below.


    I created by myself below.


    Best Regards,
    Masao Kaizuka

  • 0 in reply to MASAO KAIZUKA
    Prodigy 40 points

    In reply to Thomas Kuehl:

    Dear Thomas-san,

    Since previous reply doesn't show picture correctly, I retry it.

    The file I downloaded was *.bxl file.  The file you mentioned is 3D-CAD file, which shows the 3D figure of this parts.
    The image is shown below.


    I downloaded OPA541_KV_11.bxl and converted to CAD file by using UltraLibrarian.
    Below is the screen shot of UltraLicrarian.




    And UL generated footprint is below.


    I created by myself below.


    Best Regards,
    Masao Kaizuka

  • 0 in reply to MASAO KAIZUKA
    TI__Guru* 93105 points

    Kaizuka-san,

    Thank you much for the detailed information. It clearly shows there is a problem with the OPA541 KV_11 package footprint contained in the Ultra Librarian library. The footprint you created on your own is correct when compared the .bxl file information. I will need to let our packaging team know of this error.

    I apologize for the inconvenience the software caused you. Sometimes things that are not correct get past the people that create, or review them.

    Regards, Thomas

    Precision Amplifiers Applications Engineering