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Temperature Sensors Forum
TMP175 - TMP275
I am trying to develop an application using TMP temperature sensors but I wonder what happens if I go out of the temperature range.
I need to go to -60 C... would I get still have a measurement on the sensor? I cannot find this information, Does anyone knows?
Does anyone knows a sensor that I can use that can go really negative temperatures?
The TMP175 and TMP275 have an absolute maximum rating for operating temperature of T = -55 to 127 degC. Operating outside of these limits may cause permanent damage to the device.
You don't want to operate any temperature sensor outside of the temperature region specified under the Electrical Characteristics table, specifically T = -40 to 125 degC for the TMP175 and TMP275. The device will operate up to it's absolute maximum operating temperature however the electrical characteristics cannot be guaranteed outside of T = -40 to 125 degC.
In your design, is it possible to use an RTD such as the PT100. Here is a link to this device: http://www.thermometricscorp.com/rtdsensors.html. This RTD offers very good accuracy over the temperature range from T = -200 to +850 degC.
Best Regards,Chris FeatherstoneLinear Characterization EngineerHigh Performance Linear Products
Thank you so much for the response.
Those look nice. Now, how do I read out the temperature from one of those into a MSP and then display that into the computer?
Do you have a code example?
I would recommend looking at the ADS1247. This analog to digital converter can interface with the MSP and provides a complete front-end solution for temperature sensor applications including RTDs.
Here is a link to the ADS1247 : http://www.ti.com/product/ads1247
Under tools and software you will find an IBIS model that you can use to simulate your system using Texas Instruments free SPICE simulator TINA. Here is a link to the TINA users guide.
If you scroll down to the bottom of the page you will see the download tab for TINA. If you would like to test out the device you can order a free sample from theADS1247 link above. We also have an evaluation module available for purchase that can help out with prototyping your system.
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