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ADS1278: Materials

Glenn Ogg
Prodigy 10 points

Part Number: ADS1278

Tool/software:

The description in your data sheet is: Creramic quad flatpack with flat leads brazed to non-conductive tie bar, Hermetically sealed with metal lid, leads are gold plated

I need to know the materials used.

What alloy are the leads made of?

Is there a nickel underplate under the gold plate on the leads?

What alloy is the lid made of?

Is the lid plated?

What alloy is used as a seam sealer between the lid and package?

What braze alloy is used between the leads and tie bar?

Thank you!

  • 0
    TI__Guru 52380 points

    Hello Glenn,

    Welcome to the TI E2E community!

    If you go to the product folder page and scroll down to the 'Ordering & quality' section, you can click on the 'View or download' link under Quality, reliability column to see the material content of the device.

    Regards,
    Keith Nicholas
    Precision ADC Applications

  • 0
    Prodigy 10 points

    Well that wasn't helpful. I just need answers to my questions. Not a page of ROHS materials declarations. We build space hardware and we need to understand the materials we place in our assemblies. I'd expect this to have Kovar leads plated with nickel and gold. Maybe the lid is Kovar too and the lid attach is done with a gold tin solder. do the leads have a tin finish or just gold. If you won't share because it's proprietary then say so and we'll decide what to do from there.

    Glenn

  • 0 in reply to Glenn Ogg
    TI__Guru 52380 points

    Hi Glenn,

    Can you provide the specific orderable part number that you need this information?

    Regards,
    Keith

  • 0 in reply to Keith Nicholas
    TI__Guru 52380 points

    Hi Glenn,

    Below is the specific data you requested for the ADS1278MHFQ-MLS orderable:

    What alloy are the leads made of?

    • NIAu

    Is there a nickel underplate under the gold plate on the leads?

    • Yes

    What alloy is the lid made of?

    • This is a ceramic Lid

    Is the lid plated?

    • No

    What alloy is used as a seam sealer between the lid and package?

    • AuSn (Solder)

    What braze alloy is used between the leads and tie bar?

    • This is a Non Conductive Tie Bar (NIAu)

    Regards,
    Keith