Because of the Thanksgiving holiday in the U.S., TI E2E™ design support forum responses may be delayed from November 25 through December 2. Thank you for your patience.

  • State Resolved
  • Locked Locked
  • Replies 5 replies
  • Subscribers 31 subscribers
  • Views 14265 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

which is pin 1 on TPA6101A2?

Paul H
Prodigy 30 points
Other Parts Discussed in Thread: TPA6101A2, TPA6132A2

Dear TI:

Re this datasheet:
TPA6101A2
"50-mW ULTRALOW-VOLTAGE, FIXED-GAIN STEREO HEADPHONE"
AUDIO POWER AMPLIFIER
SLOS331C − AUGUST 2000 − REVISED MARCH 2007

page 1, page 18 shows SOIC package with a dot near pin 1, but the package I received (from Newark) has a bar at one end, but no dot, no notch.  Your pictures on these pages, and your text say nothing about a bar.  How would a customer know if they've soldered their chips in backwards?  Where is pin 1?

I suggest you modify your datasheet ASAP to clarify this issue for other customers.

  • 0
    TI__Genius 11680 points

    Hi, Paul,

    Can you attach a picture of the graphic? I'm not familiar with that package marking.

    - Nate

  • 0 in reply to Nate
    Prodigy 30 points

    Here is the datasheet diagram, and a photo of the real chip:

  • 0 in reply to Paul H
    TI__Guru**** 189399 points

    Hi, Paul,

    The mechanical drawing you posted is not the right one -- that drawing is for the MSOP package, and the photo is an SOIC package. The drawing for the SOIC is on page 19 of the data sheet:

    This is still a little confusing, because the drawing above shows the pin one index area as the lower left quadrant, when in reality, the marking goes all the way across the surface of the package.

     

    In any case, the area with the bar is the pin 1 end of the IC.

    -d2

  • 0 in reply to Don Dapkus
    Prodigy 30 points

    Thanks, Don.  It seems sloppy that TI didn't label those diagrams on pages 18 and 19 of the datasheet as MSOP and SOIC.  They're both labeled as "Plastic Small-Outline Package".

    TI should fix the datasheet to show the bar near pins 1 and 8.  And the diagram on page 1, which refers to both the DGK and D packages (which correspond to MSOP and SOIC, respectively) should be corrected, also.  It shows a dot near pin 1, which doesn't exist in the SOIC package.

  • 0 in reply to Paul H
    TI__Guru**** 189399 points

    Hi, Paul,

    Thanks for your feedback on our data sheet. I will pass your comments onto the appropriate people here at TI.

    BTW, we have a new ROCKIN' amp, the TPA6132A2. It is AWESOME! No output caps needed, super low noise floor, and NO pop WHATSOEVER! It is my most favorite HP amp. Don't let the 25 mW of power scare you; it is plenty load enough for most applications using consumer-grade earbuds or head phones.

    -d2