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ADS1293: No thermal pad dimensions in datasheet

Oskar B
Prodigy 90 points
Part Number: ADS1293
Other Parts Discussed in Thread: ADS1299,

Hello,

When looking at the datasheet for the ADS1293, I cannot find the thermal pad dimensions or an example board layout with pad dimensions. This is strange, as another ADC such as the ADS1299 has this in the datasheet.

Is this a silly mistake on my end? If not, can you please direct me to where I can find the thermal pad dimensions and the recommended pad dimensions.

Thanks

  • 0
    TI__Guru 66266 points

    Hello Oskar,

    Welcome to our forum and thank you for your post.

    The thermal pad dimensions can be found on page 77 of the ADS1293 data sheet. They are given as 3.6 mm x 3.6 mm with +/- 0.15 mm tolerance.

    The ADS1299 does not have a thermal pad.

    Best regards,

  • 0 in reply to Ryan Andrews
    Prodigy 90 points

    Hello,

    Thank you for the welcome. Maybe I have the wrong data sheet for the ADS1293 as no where on page 77 says the dimensions you just gave me. It says on the bottom of page 77 to refer to the datasheet for the values, which is confusing as I am already on it. Furthermore I don't see the recommended pad and stencil aperture dimensions, like I see on the ADS1299 datasheet.

    If these dimensions are shown on your datasheet, may you please send me the link of your copy? I got the datasheet I am currently using from the ADS1293 page on the TI website. I attached what the page looks like on my PDF as a image.

    Thanks,

    Oskar

  • 0 in reply to Oskar B
    TI__Guru 66266 points

    Hi Oskar,

    This is rather interesting - we do have the same data sheet revision (Rev. C), but it appears that the Mechanical Data pages are slightly different. These pages are automatically appended to our data sheets depending on the available device packages. The images you show match what is available online today.

    Attached is the copy that I have previously saved offline:

    ads1293.pdf

    Best regards,

  • 0 in reply to Ryan Andrews
    Prodigy 90 points

    Perfect, thank you very much. That is very interesting. I was thinking the 3 mm dimension shown on the PDF was the overall pitch of one side's pins, as the dimension line doesn't really match up with the thermal pad.