# Operating Temperature

**URL:** <https://discourse.myriadrf.org/t/operating-temperature/12969>\
**Category:** General Discussion\
**Created:** [1 December 2025 14:17 UTC](https://discourse.myriadrf.org/t/operating-temperature/12969 "2025-12-01T14:17:06Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Philippe](https://avatars.discourse-cdn.com/v4/letter/p/f14d63/32.png) [@Philippe](https://discourse.myriadrf.org/u/Philippe)\
**Post date:** [1 December 2025 14:17 UTC](https://discourse.myriadrf.org/t/operating-temperature/12969/1 "2025-12-01T14:17:06Z")

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The LMS7002M component is specified to work up to +85°C. Is this a strict value? Is it possible to have continuous operation for several hours with an ambient temperature higher than +105°C or even +125°C ?  
Note: In this configuration, the application can accept a very significant decrease in MTBF !

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**Author:** ![Crania](https://avatars.discourse-cdn.com/v4/letter/c/96bed5/32.png) [@Crania](https://discourse.myriadrf.org/u/Crania)\
**Post date:** [5 December 2025 12:43 UTC](https://discourse.myriadrf.org/t/operating-temperature/12969/2 "2025-12-05T12:43:26Z")

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85°C is the chip temperature under operating conditions,  
and not the ambient temperature.  
In the data sheet, there are no data for the thermal-resistor between chip and ambient.  
So you must hold the chip temperature under 85°C with a fan or heatsink.  
if you increase the chip temperature over 85°C then there are  
first temporary operating functional errors and then permanently damage the IC  
with overheating.

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**Author:** ![Philippe](https://avatars.discourse-cdn.com/v4/letter/p/f14d63/32.png) [@Philippe](https://discourse.myriadrf.org/u/Philippe)\
**Post date:** [8 December 2025 12:41 UTC](https://discourse.myriadrf.org/t/operating-temperature/12969/3 "2025-12-08T12:41:01Z")

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Thank you for your response. In some cases the Tj parameter is not trict and it’s dependent on the Ta parameter and power dissipation. Here I understand that the parameter is strict.