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TLV3011-EP: LTV3011, 1.24V Reference changes at temperature under -30C

Brian S. Hansen
Prodigy 20 points
Part Number: TLV3011-EP
Other Parts Discussed in Thread: TLV3011

TLV3011-EP

 

We have seen a problem with the TLV3011 comporator with built-in reference.

At some component the referent start to increase from the normal 1.24V at temperature under -31C.

See picture.

 

 

 

I have seen some old issues with this devices:

https://e2e.ti.com/support/amplifiers-group/amplifiers/f/amplifiers-forum/885814/tlv3011-ep-reference-voltage-rising-below--25-c?tisearch=e2e-sitesearch&keymatch=TLV3011#

https://e2e.ti.com/support/amplifiers-group/amplifiers/f/amplifiers-forum/807669/tlv3011-ep-ref-output-goes-up-to-3-58v-when-below--40c-on-one-chip

 ..but can not see the conclusions of these.

 

Please help with this issue.

Best regards

Brian

  • 0
    TI__Guru 51526 points

    Hello Brian,

    The original device had an issue with the reference failing at cold temperatures.

    So instead of trying to fix a 20 year old design, we re-designed and introduced the improved "B" versions on a new process. We made sure that they operated down past -55°C.

    Currently the "B" devices are available in the commercial and Q1 versions.

    The "old" devices will eventually be PCN'ed to the new "B" die. So I would recommend getting some "B" samples and verify that they work in your design.

    The "B" die is the same for the commercial, Q1 and EP devices, so you could do a quick operational verification to make sure it meets your needs.

  • 0 in reply to Paul Grohe
    Prodigy 20 points

    Dear Paul

    Many thanks for the quick response, we truly appreciate it.

    Our design needs to function down to -54°C, and all units undergo testing at this temperature. Therefore, it’s crucial for us that components are specified for such low temperatures. When can we expect the TLV3011B-EP version to be in production?

    Alternatively, what temperature range has the -Q1 version been tested for?

    Best regards

    Brian

  • 0 in reply to Brian S. Hansen
    TI__Guru 51526 points

    Hello Brian,

    Only the EP will be specified down to -55C.

    However, they all use the same die - and were characterized down to -55.

    So the Commercial and Q1 "B" should easily operate to -55C, but they are not warrantied for below -40C.

    Of course, there are differences in the package BOM and assembly flows between the three versions - but electrically they should be the same. You should be able to at least run quals with the Q1.

    I will check on the timing of the EP - though we usually do not publicly discuss future release dates (will contact you directly).

  • 0 in reply to Paul Grohe
    Prodigy 20 points

    Thanks for the answer.

    Please provide information on the availability of the B-EP version.

    We need to decide what to do in our situations, so we would like to have more information about the error the component has and how often this behavior occurs. One out of ?
    And if you have another alternative that works at -55C and is pin compatible.

    Best regards, Brian

  • 0 in reply to Brian S. Hansen
    TI__Mastermind 24040 points

    Brian

    Thanks for your patience and understanding.  In order to provide the best support and options for you, I would like to take this post offline.  I will send a friend request with my direct contact information.  I look forward to finding an option for you.

    Chuck