Support software
TMP451
1.7-V remote and local temperature sensor with N-factor, filtering and series-R correction
Data sheet
TMP451
- ±1°C Accuracy for Local and Remote Diode Sensors
- 0.0625°C Resolution for Local and Remote Channels
- 1.7-V to 3.6-V Supply and Logic Voltage Range
- 27-µA Operating Current, 3-µA Shutdown Current
- Series Resistance Cancellation
- η-Factor and Offset Correction
- Programmable Digital Filter
- Diode Fault Detection
- Two-Wire and SMBus™ Serial Interface
- 8-Lead WSON (WDFN) Package
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.
Technical documentation
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View all 6 | 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 | 29 Sep 2014 |
| Application note | How to Read and Interpret Digital Temperature Sensor Output Data (Rev. A) | PDF | HTML | 21 Jan 2025 | |
| Application brief | Improving System Reliability in Auto and Ind. Cameras w/ AccurateTemp. Sensing | PDF | HTML | 03 Jan 2022 | |
| Application note | Remote Temperature Transistor Sensor Selection Guide | PDF | HTML | 24 Mar 2021 | |
| Application note | Optimizing Remote Diode Temperature Sensor Design (Rev. A) | 18 Dec 2019 | ||
| Application brief | High-Performance Processor Die Temperature Monitoring (Rev. A) | 17 Oct 2019 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
Evaluation board
TMP451EVM — TMP451 1.7-V remote and local temperature sensor evaluation module
The TMP451EVM is an evaluation module that is used to fully evaluate the TMP451, a 1.8V remote temperature sensor. The TMP451 has the capability of measuring remote temperatures and on-chip temperatures. The TMP451 is an integrated circuit that provides 1˚C accuracy temperature measurement with (...)
User guide: PDF
Driver or library
LM90SW-LINUX — Linux Driver for LM90
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.
Linux Mainline Status
Available in Linux Main line: Yes
Available through git.ti.com: N/A
Supported Devices:
- (...)
Support software
SBOC437 — TMP451EVM Source Code
Supported products & hardware
Calculation tool
SBOC594 — Remote Temperature Sensor Calibration Tool
Supported products & hardware
Reference designs
TIDA-00737 — Capacitor Bank Control and HMI Subsystem Reference Design for Automatic Power Factor Controller
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 |
Ordering & quality
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