AEC-Q100 Automotive 3Ch Remote Temperature Sensor


Product details


Local sensor accuracy (Max) (+/- C) 1.5 Type Remote Operating temperature range (C) -40 to 125 Supply voltage (Min) (V) 2.7 Interface type I2C, SMBus, 2-Wire Supply voltage (Max) (V) 5.5 Supply current (Max) (uA) 38 Temp resolution (Max) (bits) 12 Features One-shot conversion Remote channels (#) 3 Addresses 2 Rating Automotive open-in-new Find other Digital temperature sensors

Package | Pins | Size

SOT-23 (DCN) 8 8 mm² 2.9 x 2.8 open-in-new Find other Digital temperature sensors


  • AEC-Q100 Qualified with the Following Results
    • Temperature Grade 1: –40°C to +125°C
    • Device HBM ESD Classification Level 2
    • Device CDM ESD Classification Level C5
  • SOT23-8 Package
  • ±1°C Remote Diode Sensor (Maximum)
  • ±1.5°C Local Temperature Sensor (Maximum)
  • Series Resistance Cancellation
  • n-Factor Correction
  • Two-Wire I2C or SMBus™ Compatible Serial Interface
  • Multiple Interface Addresses
  • Diode Fault Detection
  • RoHS Compliant and No Sb/Br
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The TMP421-Q1, TMP422-Q1, and TMP423-Q1 devices are single, dual, and triple remote, automotive-qualified temperature sensor monitors with a built-in local temperature sensor. The remote temperature sensor diode-connected transistors are typically low-cost, NPN- or PNP-type transistors or diodes that are an integral part of microcontrollers, microprocessors, or field-programmable gate arrays (FPGAs).

Remote accuracy is ±1°C for multiple device manufacturers, with no calibration needed. The two-wire serial interface accepts SMBus write byte, read byte, send byte, and receive byte commands to configure the device.

The TMP421-Q1, TMP422-Q1, and TMP423-Q1 include series resistance cancellation, programmable non-ideality factor, wide remote temperature measurement range (up to +150°C), and diode fault detection.

The TMP421-Q1, TMP422-Q1, and TMP423-Q1 are all available in an 8-pin SOT-23 package.

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Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 5
Type Title Date
* Datasheet TMP42x-Q1 ±1°C Remote and Local Temperature Sensor datasheet Nov. 29, 2016
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.

Software development

Linux Driver for TMP421
TMP421SW-LINUX The Linux driver supports the TMP421 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 N/A

Supported Devices:
  • (...)

Reference designs

Optical Sense Backlight Reference Design with Temperature Sensing
TIDA-01008 — This reference design conserves power and extends life of LCD and backlight by adjusting the backlight brightness relative to the ambient light level. The capTIvate touch slider allows the brightness to be finetuned per the user's brightness preference. The sensitive thermal requirements of the LCD (...)
document-generic Schematic document-generic User guide
Automotive Multiple Channel Temperature Sensing for LED Headlight Reference Design
TIDA-01381 — The TIDA-01381 TI Design details a solution on how to drive a string of matrix LED headlights, measure the temperature of the LEDs, and implement support for thermal foldback, which reduces the current in the LEDs as the LED temperature rises to prevent damage to the LEDs. The design uses TI (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
SOT-23 (DCN) 8 View options

Ordering & quality

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