The TMP451 device is a high-accuracy, low-power remote temperature sensor monitor with a built-in local temperature sensor. The remote temperature sensors are typically low-cost discrete NPN or PNP transistors, or substrate thermal transistors or diodes that are integral parts of microprocessors, microcontrollers, or FPGAs. The temperature is represented as a 12-bit digital code for both the local and remote sensors, giving a resolution of 0.0625°C. The temperature accuracy is ±1°C (maximum) in the typical operating range for the local and the remote temperature sensors. The two-wire serial interface accepts the SMBus communication protocol.
Advanced features such as series resistance cancellation, programmable nonideality factor (η-factor), programmable offset, programmable temperature limits, and a programmable digital filter are combined to provide a robust thermal monitoring solution with improved accuracy and noise immunity.
The TMP451 device is ideal for high-accuracy temperature measurements in multiple locations and in a variety of automotive subsystems. The device is specified for operation over a supply voltage range of 1.7 V to 3.6 V and a temperature range of –40°C to 125°C.
| Top documentation | Type | Title | Format options | Date |
|---|---|---|---|---|
| * | Data sheet | TMP451 ±1°C Remote and Local Temperature Sensor With η-Factor and Offset Correction, Series-Resistance Cancellation, and Programmable Digital Filter datasheet (Rev. A) | PDF | HTML | Sep 29, 2014 |
| Application note | How to Read and Interpret Digital Temperature Sensor Output Data (Rev. A) | PDF | HTML | Jan 21, 2025 | |
| Application brief | Improving System Reliability in Auto and Ind. Cameras w/ AccurateTemp. Sensing | PDF | HTML | Jan 3, 2022 | |
| Application note | Remote Temperature Transistor Sensor Selection Guide | PDF | HTML | Mar 24, 2021 | |
| Application note | Optimizing Remote Diode Temperature Sensor Design (Rev. A) | Dec 18, 2019 | ||
| Application brief | High-Performance Processor Die Temperature Monitoring (Rev. A) | Oct 17, 2019 |
For additional terms or required resources, click any title below to view the detail page where available.
The Linux driver supports the LM90 series of Remote and Local Temp Sensors. The Linux driver supports communication through the I2C bus and interfaces with the Hardware Monitoring sub-system.
Available in Linux Main line: Yes
Available through git.ti.com: N/A
This reference design demonstrates the working of various functional blocks of an automatic power factor controller (PFC) used in MV/LV electrical distribution. This includes accurate measurement and computation of voltages, currents, power and power factor, display of measured parameters (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| WSON (DQF) | 8 | Ultra Librarian |
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