Home Sensors Temperature sensors Digital temperature sensors
Home
Sensors
Temperature sensors
Digital temperature sensors

TMP121

ACTIVE

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

Order now
Data sheet

TMP121

ACTIVE
Data sheet Order now

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 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 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.
open-in-new Find other Digital temperature sensors
Download

Similar products you might be interested in

open-in-new Compare products
Similar functionality to the compared device.
NEW TMP126 ACTIVE ±0.25°C SPI temperature sensor with 175°C operation, CRC and slew-rate alert SPI output with improved accuracy, extended temperature & voltage supply ranges, smaller package, less current & additional features

Technical documentation

star =Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 5
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 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
Technical article Tips and tricks for human body temperature measurement with analog temperature sensor ICs 08 Sep 2015

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
  • (...)
View options
Simulation model

TMP121 IBIS Model (Rev. A)

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

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

Support & training

TI E2E™ forums with technical support from TI engineers

View all forum topics

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos