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TL082-Q1: Thermal information

Sirui Zhu
Intellectual 2070 points
Part Number: TL082-Q1
Other Parts Discussed in Thread: TL082

Hi team,

Hope you have a good day.

My customer is using TL082IDRQ1, and have test the case temperature is 95°. This part operating temp is 85°.

Since they didn't find the thermal information in the datasheet, could you provide that? So customer can estimate whether they should upgrade to 125° version

BR

Sirui

  • 0
    Guru 140200 points

    Hi Sirui,

    measuring the case temperature of a plastic package is a difficult task, as the tip of thermometer can easily cool down the surface which will degrade the reading. So it's probable that the case temperature is even some higher than 95°C. If reliability and precision is important in your application, I would go for the 125°C version ("Q").

    Kai

  • 0 in reply to kai klaas69
    TI__Guru*** 136386 points

    Hello Siri,

    Yes, upgrade to TL082QDRQ1.

    Do you know why the TL082 is so hot? Ambient temperature, output current, supply voltage.

    Based on data from similar TL082IDR, expect the die being approximately 11C/W hotter than the top of case. 

  • 0 in reply to Ron Michallick
    TI__Intellectual 2070 points

    Hi Ron,

    Thanks for replying. The ambient temp is high due to other device, TL082 is not the hot source. So I understand the junction temp will be lower than case temp. In this case, can we use 85° version? 

    BR 

    Sirui

  • 0 in reply to Sirui Zhu
    Guru 140200 points

    Hi Sirui,

    when the TL082 is operating it dissipates heat and becomes a heat source. Because of that the junction will always be at a higher temperature than the case. This is the nature of a heat source.

    Also, the "I" version must only be used up to an ambient temperature of +85°C. But as you mentioned it is +95°C. So the "Q" version should be used.

    Kai

  • 0 in reply to kai klaas69
    TI__Guru*** 136386 points

    Surui,

    Also measure lead temperature. Most of the heat flow is though the leads.