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TMP121

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1.5°C 2.7V to 5.5V digital temperature sensor with SPI interface in SOT-23

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Data sheet

TMP121

ACTIVE
Data sheet Order now

Product details

Local sensor accuracy (max) 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) (µA) 50 Temp resolution (max) (bps) 12 Remote channels (#) 0 Rating Catalog
Local sensor accuracy (max) 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) (µA) 50 Temp resolution (max) (bps) 12 Remote channels (#) 0 Rating Catalog
SOT-23 (DBV) 6 8.12 mm² 2.9 x 2.8
  • 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
Application note How to Read and Interpret Digital Temperature Sensor Output Data (Rev. A) PDF | HTML 21 Jan 2025

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
  • (...)
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Simulation model

TMP121 IBIS Model (Rev. A)

SBOM878A.ZIP (68 KB) - IBIS Model
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Package Pins CAD symbols, footprints & 3D models
SOT-23 (DBV) 6 Ultra Librarian
TI's Standard Terms and Conditions for Evaluation Items apply.

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