Product details

Local sensor accuracy (Max) (+/- C) 1.5 Type Local Operating temperature range (C) -40 to 125 Supply voltage (Min) (V) 2.7 Interface type SPI Supply voltage (Max) (V) 5.5 Supply current (Max) (uA) 50 Temp resolution (Max) (bits) 12 Remote channels (#) 0 Addresses NA Rating Catalog
Local sensor accuracy (Max) (+/- C) 1.5 Type Local Operating temperature range (C) -40 to 125 Supply voltage (Min) (V) 2.7 Interface type SPI Supply voltage (Max) (V) 5.5 Supply current (Max) (uA) 50 Temp resolution (Max) (bits) 12 Remote channels (#) 0 Addresses NA Rating Catalog
SOT-23 (DBV) 6 5 mm² 2.9 x 1.6
  • DIGITAL OUTPUT: SPI-Compatible Interface
  • RESOLUTION: 12-Bit + Sign, 0.0625°C
  • ACCURACY: ±1.5°C from –25°C to +85°C (max)
  • LOW QUIESCENT CURRENT: 50 µA (max)
  • WIDE SUPPLY RANGE: 2.7V to 5.5V
  • TINY SOT23-6 PACKAGE
  • OPERATION TO 150°C
  • APPLICATIONS
    • POWER-SUPPLY TEMPERATURE MONITORING
    • COMPUTER PERIPHERAL THERMAL PROTECTION
    • NOTEBOOK COMPUTERS
    • CELL PHONES
    • BATTERY MANAGEMENT
    • OFFICE MACHINES

All other trademarks are the property of their respective owners.

  • DIGITAL OUTPUT: SPI-Compatible Interface
  • RESOLUTION: 12-Bit + Sign, 0.0625°C
  • ACCURACY: ±1.5°C from –25°C to +85°C (max)
  • LOW QUIESCENT CURRENT: 50 µA (max)
  • WIDE SUPPLY RANGE: 2.7V to 5.5V
  • TINY SOT23-6 PACKAGE
  • OPERATION TO 150°C
  • APPLICATIONS
    • POWER-SUPPLY TEMPERATURE MONITORING
    • COMPUTER PERIPHERAL THERMAL PROTECTION
    • NOTEBOOK COMPUTERS
    • CELL PHONES
    • BATTERY MANAGEMENT
    • OFFICE MACHINES

All other trademarks are the property of their respective owners.

The TMP121 and TMP123 are SPI-compatible temperature sensors available in a tiny SOT23-6 package. Requiring no external components, the TMP121 and TMP123 are capable of measuring temperatures within 2°C of accuracy over a temperature range of –40°C to +125°C. Low supply current, and a supply range from 2.7V to 5.5V, make the TMP121 and TMP123 excellent candidates for low-power applications.

The TMP121 and TMP123 are ideal for extended thermal measurement in a variety of communication, computer, consumer, environmental, industrial, and instrumentation applications.

The TMP121 and TMP123 are SPI-compatible temperature sensors available in a tiny SOT23-6 package. Requiring no external components, the TMP121 and TMP123 are capable of measuring temperatures within 2°C of accuracy over a temperature range of –40°C to +125°C. Low supply current, and a supply range from 2.7V to 5.5V, make the TMP121 and TMP123 excellent candidates for low-power applications.

The TMP121 and TMP123 are ideal for extended thermal measurement in a variety of communication, computer, consumer, environmental, industrial, and instrumentation applications.

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Technical documentation

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Type Title Date
* Data sheet TMP121, TMP123: 1.50C Accurate Digital Temperature Sensor with SPI Interface datasheet (Rev. C) 03 Feb 2005
Technical article How to choose the right thermistor for your temperature sensing application 13 Feb 2020
Technical article How to enable thermal safety for automotive infotainment and cluster systems 15 Oct 2019
Technical article Driving industrial innovation with small-size sensors 12 Sep 2019
Technical article How to select a temperature sensor probe 18 Feb 2016

Design & development

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

Driver or library

LM70SW-LINUX — Linux Driver for LM70

The Linux driver supports the LM70 series of Temperature Sensors. The Linux driver supports communication through the SPI 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:
  • lm70
  • tmp121
  • (...)
Simulation model

TMP121 IBIS Model (Rev. A)

SBOM878A.ZIP (68 KB) - IBIS Model
Package Pins Download
SOT-23 (DBV) 6 View options

Ordering & quality

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