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TLV7041-Q1: change over the years

yusuke.akagi
Prodigy 10 points
Part Number: TLV7041-Q1

The TI Customer Support Center responded that even if it changes over time, it will still be within the specifications listed in the datasheet.

I have a question.
Does this mean that there is no change over time? Or, do the electrical characteristics listed in the datasheet include changes over time?
If the specifications incorporate change over time, what would the initial variation be?

Here is an example of use that I am concerned about.
Even if trimmed before shipment from the factory, will the electrical characteristics gradually change over time as the product is used in the market?
If the characteristics change gradually, I would like to know how much change needs to be incorporated into the product design.

  • +1
    Guru 276640 points

    There might be a change over time, but the parameters will not go outside the specified limits.

    For example, the TLV7041-Q1 has a specified worst-case input offset voltage of ±8 mV. Some particular chips might have 0.1 mV when shipped and go to 7.9 mV over its lifetime, or begin at 7.8 mV and change to 7.9 mV. There are no guarantees, except what is specified in the datasheet.

    The most likely cause of degradation is electromigration, which is caused by high currents and temperatures. You would need to go near or beyond the absolute maximum ratings to see degradation beyond the specified limits.

  • +1
    TI__Genius 11701 points

    Hello Yusuke, 

    Thanks for your post. Yes, as Clemens mentioned, it will still be within datasheet specification limits even if there are changes over time. We can only guarantee that it would not go beyond the max and min limits, not how much it will vary or change over time. 

  • 0 in reply to Chi Nguyen1
    TI__Mastermind 24340 points

    Yusuke

    Thanks for your post and everyone's responses. 
    I am concerned that the posts and the comments that you received from TI Customer Support Center are a bit confusing, so I will attempt to clarify.

    Variation of specs over the lifetime of a product are expected unless you are specifically thinking of a VOS spec on a zero drift amplifier.  In that case, a zero drift amplifier is constantly making adjustments for VOS over time and temperature.  Otherwise, the specs on a comparator such as TLV7041-Q1 will have some variation as noted in the note that Kai eludes to https://e2e.ti.com/blogs_/archives/b/precisionhub/posts/ic-long-term-stability-the-only-constant-is-change .

    As noted in the link, specs like VOS on a comparator can and will shift.  However, we run accelerated life tests on our products and look for design/process weaknesses in an attempt to minimize these shifts.  As a result, we do not expect our specs to shift much outside of the limits assuming operation is within the ranges specified in the EC table.

    I hope this information has proved to be helpful.

    Chuck