Product details


Local sensor accuracy (Max) (+/- C) 1 Product type Remote Operating temperature range (C) -40 to 125 Supply voltage (Min) (V) 1.7 Interface type I2C, SMBus, 2-Wire 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) package

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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 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

= Top documentation for this product selected by TI
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Type Title Date
* Datasheet TMP451-Q1 ±1°C Remote and Local Temperature Sensor With η-Factor and Offset Correction, Series-Resistance Cancellation, and Programmable Digital Filter datasheet (Rev. B) Jun. 10, 2019
Technical articles How to choose the right thermistor for your temperature sensing application Feb. 12, 2020
Technical articles How to enable thermal safety for automotive infotainment and cluster systems Oct. 15, 2019
Technical articles Driving industrial innovation with small-size sensors Sep. 12, 2019
Technical articles How sensor technology is evolving to meet cold chain needs Jun. 18, 2018

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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