Product details


Local sensor accuracy (Max) (+/- C) 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 Supply current (Max) (uA) 40 Temp resolution (Max) (bits) 12 Features ALERT Remote channels (#) 1 Addresses 1 Rating Automotive open-in-new Find other Digital temperature sensors

Package | Pins | Size

WSON (DQF) 8 4 mm² 2 x 2 WSON (DQW) 8 6 mm² 2.5 x 2 open-in-new Find other Digital temperature sensors


  • 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)

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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

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

document-generic User guide
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 (...)
  • Enables full evaluation of TMP451
  • Programmable Non-Ideality Factor
  • Series Resistance Cancellation
  • 12 Bit Resolution

Software development

SBOC436.ZIP (124329 KB)
SBOC437.ZIP (288 KB)

Design tools & simulation

SBOM836.ZIP (59 KB) - IBIS Model

CAD/CAE symbols

Package Pins Download
WSON (DQF) 8 View options
WSON (DQW) 8 View options

Ordering & quality

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  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

Support & training

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