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What is ambient temperature?

Hebe Yin
Prodigy 10 points

When I need to measure the ambient temperature of ICs for simulation or derating purpose, where should I put the temperature sensors?  I surpose the location should be the air above the component. But how much should be the gap between the case of the componet and the sensors? 5mm? 1cm? or can I just use the case temperature as the ambient temperature for these low power ICs?

 

 

  • 0
    TI__Guru** 114905 points

    Hi Hebe,

    The environment used to measure ambient temperature is described in the JEDEC standard (JESD51-2a).

    To the left side of the forum, there is a link to various resources. One of them is the "PCB Thermal Calculator & App Notes". At this site, there is a wealth of information from our packaging experts.

    FYI, one of the links on the "PCB Thermal Calculator & App Notes" page is "Methods of Estimating Component Temperatures". I hope you will find this useful.