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INA780A: Footprint discrepancy

Yair Lior
Prodigy 70 points

Part Number: INA780A
Other Parts Discussed in Thread: INA740B

Tool/software:

We have downloaded the Mentor footprint and we see a discrepancy between the downloaded footprint and the data sheet.

1. pin 11 Y position is not identical to pin 4 Y position (according to data sheet, they should be identical) - Pin 11 does not match spec.

2. the width (X) of the 13 pads should be 0.7mm according to the data sheet. The footprint is slightly smaller.

Can you please review the footprint and confirm which one is correct? 

  • 0
    TI__Mastermind 32395 points

    Welcome Valued Engineer,

    I’m sorry to hear you find this inconvenience. I have reached out to the model and footprint team and am waiting for a response.

    I have checked footprint in Altium and do not see what you report, rather I see the correct layout. 

    If possible, would please provide any type of image of the problematic layout areas displayed in Mentor. I do not have this installed yet hopefully to check.

    Sincerely,

    Peter

  • 0 in reply to Peter Iliya
    Prodigy 70 points

    1. The position of pin 11 should be (2.85, 0.25), but the Mentor footprint pin 11 position is (2.85, 0.30)

    2. In the spec., the width of all 13 pins should be 0.7mm, but the Mentor footprint pins width is 0.65mm and 0.63mm

    Although these are small deviations, I would like to get confirmation from you.

    Thank you in advance,

    Yair

  • 0 in reply to Yair Lior
    TI__Expert 8280 points

    Yair,

    Thank you for your patience. Peter is out of the office today but will reply when he returns on Wednesday.

    Louis

  • 0 in reply to Yair Lior
    TI__Mastermind 32395 points

    Hey Yair,

    1. Does pin 4 (or any other pins) also have the incorrect y coordinate(s)? How are you measuring the coordinates? How do you determine center of package? Altium footprint shows pin 11 y coordinate at 0.2499mm.

    2. This seems small, but if they are real I would correct it while I am waiting for any updates from our footprint team in order to align with datasheet and also current EVM and Altium layout which show 0.7mm width.

    Sincerely,

    Peter

  • 0
    Prodigy 70 points

    Thanks for the update, Peter,

    It looks like the Altium footprint is OK.

    The issue is with the Mentor footprint.

    I am measuring the distance from the package center - same as the data-sheet defines.

    In addition, I wish that the Mentor footprint would also have the round edges as the Altium.

    Regards,

    Yair

  • 0 in reply to Yair Lior
    TI__Mastermind 32395 points

    Hello Yair,

    I should be getting a response from our footprint team soon on an update.

    Could the round edges be a setting to change in Mentor?

    Is there any chance you could try importing the INA740B just to see if it is any different?

    What is the mentor software are you using?

    We apologize for the inconvenience. 

    Sincerely,

    Peter