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TPA2100 PCB Footprint

Markus Haensler
Prodigy 80 points


Hello

I am currently doing a PCB with the TPA2100 which is only available within the DSBGA Package. On page 22 inside the latest PDF Datasheet the dimensions for the BGA are mentioned. Unfortunately there are two times numbers with two different values. The first time at the hight of the balls (0,35 and 0,15) as well as on the ball size itself (0.35 and 0.25). Unfortunately it's not written inside the document what these numbers are. Typically the number on top is sometimes Inch and the number below mm but this is not the case in this Datasheet. I would imagine that the lower number is mm otherwise the BGA can't be connected with a 75um connection. Could someone please let me know what these two numbers mean? 

Thank you very much for your help

Best regards

Markus

  • 0
    TI__Mastermind 20085 points
    Hi Markus

    These numbers mean the maximum and minimum value in millimeters that it could have in the package.

    Best Regards
    Jose Luis Figueroa
    Audio Applications Engineer | A-Team
  • 0 in reply to José Luis
    Prodigy 80 points

    Hi Jose

    Thank you very much for your answere. I just have one small Point which I would like to clarify. On your provided footprint (http://www.ti.com/product/TPA2100P1/quality), the dimensions of the ball on the PCB is designed as Maximum which would mean 0.35 mm for top metal. This results in a spacing between the balls (on the PCB) of 0.15 which makes it impossible to connect the inner balls, even with 75 um Connections. Is there a missunderstanding from my side or is there a reason why this footprint is done in that way? Otherwise I would increase the PCB ball size to 0.25.

    Thank you and best regards

    Markus