• State TI Thinks Resolved
  • Locked Locked
  • Replies 4 replies
  • Answers 1 answer
  • Subscribers 51 subscribers
  • Views 308 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

LM331: LM331 low temperature failure mode

user5947936
Prodigy 20 points
Part Number: LM331
Other Parts Discussed in Thread: LM231

Hi,

we are using a circuit that include an LM331. The LM331 is in a circuit reproducing the basic Voltage tot Frequency converter of Figure 14 in the datasheet.

That circuit was used at a temperature of ~-5C which is below the operating temperature range. The person operating it saw a degradation of the output signal as the circuit reach the low temperature. Since then it is not working even after coming back to higher temperature.

Could operating the LM331 at low temperature permanently damage it?

Thanks,

Pierre-Yves

  • 0
    Guru 140200 points
    Hi Pierre-Yves,

    is condensation water trapped in the pots? Is the circuit working again after a drying phase?

    Kai
  • 0 in reply to kai klaas69
    Prodigy 20 points
    There was no water or condensation. The system is still not working after being in a dry atmosphere
  • 0
    TI__Guru* 93105 points
    Hello Pierre-Yves,

    I wouldn't expect the LM331 to be damaged by simply taking it to temperature below its rated operating temperature. The silicon integrated circuit, metal and package system are all designed to withstand a much wider temperature range than 0 to 70 °C. Additionally, there is the LM231, LM231A which is rated for −25 to 85 °C and uses the same physical materials.

    Had the LM331 device that stopped working been in use for some time?

    Have you observed this on more than one LM331 device?

    Was the LM331 device obtained directly from TI, or one of TI's authorized distributors?

    Is the device marked with the TI logo, or National Semiconductor logo?

    Regards, Thomas
    Precision Amplifiers Applications Engineering
  • 0 in reply to Thomas Kuehl
    TI__Genius 11135 points
    Pierre-Yves

    We have not heard back from you so we will close this thread. Please reply if further discussion is needed.

    Thanks
    Dennis