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Temperature range & obsolescence of XTR110

Jose Ahumada
Prodigy 140 points
Other Parts Discussed in Thread: XTR110, XTR111

Hi all,

After using XTR110 for a new design we have some questions about it:

  • We need an operating temperature range of -40-85ºC so we chose the ceramc AG version. Now this model is NRND and it is difficult to find it at our common providers (such as farnell, mouser, digikey...). Moreover we need to manufacture our product during years and we are afraid about product obsolescence, is there any way to solve this and keep using this IC the next years (not only buying the higher possible quantities from distributors now)?
  • Another possible solution is to use the plastic package which is rated to 0-70ºC (though datasheet temperature shows specification and operating, this last one is -25-85ºC). So, what is the impact of exceeding this temperature during operation? I mean, exceeding temperature could cause destruction or just some temperature de-rating in some datasheet parameters? We can test this in a climatic chamber but we prefer to do this previous analysis.

Thanks in advance,

Regards.

  • 0
    TI__Guru 62095 points

    Hi Jose,

    Have you considered the XTR111? The device is fully specified from -40 - 85C, features higher accuracy, and is significantly less expensive than the XTR110.  If the XTR111 won't work in the system could you let us know why?

    Exceeding the device specifications for the XTR110 is not recommended and different production runs may react significantly differently to the increased temperature range than others. The absolute maximum storage range for the DIP and SOIC packages is -40C - 85C and the operating temperature range is -25-85C. 

  • 0 in reply to Collin Wells
    Prodigy 140 points
    Hi Collin,

    We are using XTR110 as a voltage-controlled current source upt to 600 mA. Could XTR111 be used in the same way? XTR110 works pretty well within this configuration. I'm going to perform some simulations about a possible configuration anyway, however any information about this would be really appreciated.

    Thanks,

    Regards.
  • 0 in reply to Jose Ahumada
    TI__Guru 62095 points

    Hello Jose,

    Thanks for the additional information.  The XTR111 will not function in the same manner as you're using the XTR110 because instead of relying on an internal (or external) resistor to set the gain of the circuit the XTR111 relies on an internal current mirror which won't allow you to change the span like you're doing with the XTR110.

    Here's the information from the TI Quality webpage regarding product obsolescence:

    What is TI’s policy on product withdrawal or discontinuance?

    TI makes an effort to not obsolete products out of convenience. Convenience means a low running device, poor yields, limited customer adoption or similar items. TI’s obsolescence withdrawal schedule provides a longer lead time than the industry standard. TI allows 12 months for the last order and an additional six months to take final delivery of obsolete items.

    In rare circumstances, an accelerated withdrawal schedule may be necessary. In such cases, TI will communicate the last buy and final delivery dates in the end of life (EOL) notice, along with an explanation of the circumstances necessitating the early withdrawal.

    This information can be found here:

    and