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TMP451

ACTIVE

1.7-V remote and local temperature sensor with N-factor, filtering and series-R correction

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Data sheet

TMP451

ACTIVE
Data sheet Order now

Product details

Local sensor accuracy (max) 1 Type Remote Operating temperature range (°C) -40 to 125 Supply voltage (min) (V) 1.7 Interface type I2C, SMBus Supply voltage (max) (V) 3.6 Features ALERT Supply current (max) (µA) 40 Temp resolution (max) (bps) 12 Remote channels (#) 1 Addresses 1 Rating Catalog
Local sensor accuracy (max) 1 Type Remote Operating temperature range (°C) -40 to 125 Supply voltage (min) (V) 1.7 Interface type I2C, SMBus Supply voltage (max) (V) 3.6 Features ALERT Supply current (max) (µA) 40 Temp resolution (max) (bps) 12 Remote channels (#) 1 Addresses 1 Rating Catalog
WSON (DQF) 8 4 mm² 2 x 2
  • ±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
  • ±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.

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.

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Technical documentation

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Type Title 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
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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:

  • (...)
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Support software

SBOC436 — TMP451EVM Software

Supported products & hardware

Supported products & hardware

Products
Digital temperature sensors
  • TMP451 — 1.7-V remote and local temperature sensor with N-factor, filtering and series-R correction
  • TMP451-Q1 — Automotive 1.7-V remote and local temp sensor with N-factor, filtering and series-R correction
Hardware development
Evaluation board
  • TMP451EVM — TMP451 1.7-V remote and local temperature sensor evaluation module
Download
Support software

SBOC437 — TMP451EVM Source Code

Supported products & hardware

Supported products & hardware

Products
Digital temperature sensors
  • TMP451 — 1.7-V remote and local temperature sensor with N-factor, filtering and series-R correction
  • TMP451-Q1 — Automotive 1.7-V remote and local temp sensor with N-factor, filtering and series-R correction
Hardware development
Evaluation board
  • TMP451EVM — TMP451 1.7-V remote and local temperature sensor evaluation module
Download
Simulation model

TMP451 IBIS Model

SBOM836.ZIP (93 KB) - IBIS Model
Download
Calculation tool

SBOC594 — Remote Temperature Sensor Calibration Tool

Supported products & hardware

Supported products & hardware

Products
Digital temperature sensors
  • TMP400 — Remote and Local Temperature Sensor with N-Factor and Series-R Correction in QSSOP-16
  • TMP411 — Remote and local temperature sensor with N-factor and series resistance correction
  • TMP421 — Remote and Local Temperature Sensor with N-Factor and Series-R Correction in WCSP
  • TMP422 — Dual Remote and Local Temperature Sensor with N-Factor and Series-R Correction in WCSP
  • TMP423 — Triple Remote and Local Temperature Sensor with N-Factor and Series-R Correction
  • TMP431 — Remote and Local Temperature Sensor with Automatic Beta, N-Factor and Series-R Correction
  • TMP432 — Dual Remote and Local Temp Sensor with Automatic Beta, N-Factor and Series-R Correction
  • TMP441 — Multi-Address Remote and Local Temp Sensor with Auto Beta, N-Factor and Series-R Correction in SOT23
  • TMP451 — 1.7-V remote and local temperature sensor with N-factor, filtering and series-R correction
  • TMP461 — High accuracy remote and local temperature sensor with pin-programmable bus address
  • TMP464 — 5-Channel (4-Remote and 1-Local) High-Accuracy Remote and Local Temperature Sensor
  • TMP468 — ±0.75⁰C High-Accuracy Multi-channel Remote and Local Temperature Sensor
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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 (...)
Design guide: PDF
Schematic: PDF
Package Pins CAD symbols, footprints & 3D models
WSON (DQF) 8 Ultra Librarian
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