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TMP451-Q1

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

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Data sheet

TMP451-Q1

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 Automotive TI functional safety category Functional Safety-Capable
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 Automotive TI functional safety category Functional Safety-Capable
WSON (DQF) 8 4 mm² 2 x 2 WSON (DQW) 8 5 mm² 2.5 x 2
  • Qualified for automotive applications
  • AEC-Q100 qualified with the following results:
    • Device temperature grade 1: –40°C to 125°C ambient operating temperature range
  • ±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-pin WSON (WDFN) packages
    • 2.50-mm × 2.50-mm with Wettable Flanks (DQW)
    • 2.00-mm × 2.00-mm (DQF)
  • Qualified for automotive applications
  • AEC-Q100 qualified with the following results:
    • Device temperature grade 1: –40°C to 125°C ambient operating temperature range
  • ±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-pin WSON (WDFN) packages
    • 2.50-mm × 2.50-mm with Wettable Flanks (DQW)
    • 2.00-mm × 2.00-mm (DQF)

The TMP451-Q1 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 the 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-Q1 device is ideal for multi-location, high-accuracy temperature measurements in a variety of automotive sub-systems. The TMP451-Q1 is available in a Wettable Flanks WSON package that provides a visual indicator of solderability to lower automatic visual inspection (AVI) time. 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-Q1 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 the 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-Q1 device is ideal for multi-location, high-accuracy temperature measurements in a variety of automotive sub-systems. The TMP451-Q1 is available in a Wettable Flanks WSON package that provides a visual indicator of solderability to lower automatic visual inspection (AVI) time. 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-Q1 ±1°C Remote and Local Temperature Sensor With η-Factor and Offset Correction, Series-Resistance Cancellation, and Programmable Digital Filter datasheet (Rev. C) PDF | HTML 15 Apr 2021
Functional safety information TMP451-Q1 Functional Safety FIT Rate and FMD (Rev. A) PDF | HTML 04 Jun 2024
Application brief Improving System Reliability in Auto and Ind. Cameras w/ AccurateTemp. Sensing PDF | HTML 03 Jan 2022
Application note Meeting ASIL Requirements for LIDAR Systems Using Remote Temperature Sensors PDF | HTML 16 Nov 2021
Technical article How to maximize powertrain efficiency and reliability with high-accuracy temperatu PDF | HTML 10 May 2021
Technical article How to enable thermal safety for automotive infotainment and cluster systems PDF | HTML 15 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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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
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WSON (DQF) 8 Ultra Librarian
WSON (DQW) 8 Ultra Librarian
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