Product details

Local sensor accuracy (Max) (+/- C) 2 Type Local Operating temperature range (C) -55 to 125 Supply voltage (Min) (V) 2.7 Interface type I2C, SMBus Supply voltage (Max) (V) 5.5 Supply current (Max) (uA) 500 Temp resolution (Max) (bits) 9 Features ALERT, UL recognized Remote channels (#) 0 Addresses 8 Rating Catalog
Local sensor accuracy (Max) (+/- C) 2 Type Local Operating temperature range (C) -55 to 125 Supply voltage (Min) (V) 2.7 Interface type I2C, SMBus Supply voltage (Max) (V) 5.5 Supply current (Max) (uA) 500 Temp resolution (Max) (bits) 9 Features ALERT, UL recognized Remote channels (#) 0 Addresses 8 Rating Catalog
SOIC (D) 8 19 mm² 4.9 x 3.9 VSSOP (DGK) 8 15 mm² 3 x 4.9
  • No External Components Required
  • Shutdown Mode to Minimize Power Consumption
  • Up to Eight LM75As can be Connected to a Single Bus
  • Power up Defaults Permit Stand-Alone Operation as Thermostat
  • Key Specifications:
    • Supply Voltage
      • LM75A: 2.7 V to 5.5 V
    • Supply Current
      • Operating: 280 µA (Typical)
      • Shutdown: 4 µA (Typical)
    • Temperature Accuracy
      • 25°C to 100°C: ±2°C (Max)
      • 55°C to 125°C: ±3°C (Max)
  • No External Components Required
  • Shutdown Mode to Minimize Power Consumption
  • Up to Eight LM75As can be Connected to a Single Bus
  • Power up Defaults Permit Stand-Alone Operation as Thermostat
  • Key Specifications:
    • Supply Voltage
      • LM75A: 2.7 V to 5.5 V
    • Supply Current
      • Operating: 280 µA (Typical)
      • Shutdown: 4 µA (Typical)
    • Temperature Accuracy
      • 25°C to 100°C: ±2°C (Max)
      • 55°C to 125°C: ±3°C (Max)

The LM75A is an industry-standard digital temperature sensor with an integrated sigma-delta analog-to-digital converter (ADC) and I2C interface. The LM75A provides 9-bit digital temperature readings with an accuracy of ±2°C from –25°C to 100°C and ±3°C over –55°C to 125°C.

The LM75A operates with a single supply from 2.7 V to 5.5 V. Communication is accomplished over a 2-wire interface which operates up to 400 kHz. The LM75A has three address pins, allowing up to eight LM75A devices to operate on the same 2-wire bus. The LM75A has a dedicated overtemperature output (O.S.) with programmable limit and hysteresis. This output has programmable fault tolerance, which lets the user to define the number of consecutive error conditions that must occur before O.S. is activated. The wide temperature and supply range and I2C interface make the LM75A ideal for a number of applications including base stations, electronic test equipment, office electronics, personal computers, and any other system in which thermal management is critical to performance. The LM75A is available in an SOIC-8 package and an VSSOP-8 package.

The LM75A is an industry-standard digital temperature sensor with an integrated sigma-delta analog-to-digital converter (ADC) and I2C interface. The LM75A provides 9-bit digital temperature readings with an accuracy of ±2°C from –25°C to 100°C and ±3°C over –55°C to 125°C.

The LM75A operates with a single supply from 2.7 V to 5.5 V. Communication is accomplished over a 2-wire interface which operates up to 400 kHz. The LM75A has three address pins, allowing up to eight LM75A devices to operate on the same 2-wire bus. The LM75A has a dedicated overtemperature output (O.S.) with programmable limit and hysteresis. This output has programmable fault tolerance, which lets the user to define the number of consecutive error conditions that must occur before O.S. is activated. The wide temperature and supply range and I2C interface make the LM75A ideal for a number of applications including base stations, electronic test equipment, office electronics, personal computers, and any other system in which thermal management is critical to performance. The LM75A is available in an SOIC-8 package and an VSSOP-8 package.

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Technical documentation

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Type Title Date
* Data sheet LM75A Digital Temperature Sensor and Thermal Watchdog With Two-Wire Interface datasheet (Rev. P) PDF | HTML 30 Dec 2014
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
Application note Temperature sensors: PCB guidelines for surface mount devices (Rev. A) 18 Jan 2019
Technical article How to select a temperature sensor probe 18 Feb 2016
Application note Applying I2C-Compatible Temperature Sensors in Systems With Slow Clock Edges (Rev. A) 06 May 2013
User guide LM75A User’s Guide 17 Jan 2013
User guide LM75AEB User’s Guide (Rev. A) 24 Aug 2012
Application note Tiny Temperature Sensors for Remote Systems 17 Feb 2003

Design & development

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

Driver or library

LM75SW-LINUX — Linux Driver for I2C temperature sensors

The Linux driver support LM75 compatible Temperature 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 git.ti.com: N/A

Supported Devices:
  • LM75A
  • TMP100
  • TMP101
  • (...)
Driver or library

SENSOREVAL — Eval Board Software For Hardware Monitors And Digital Temperature Sensors

SensorEval
SensorEval software supports the latest TI temperature sensor and hardware monitor evaluation boards via USB interface. It also allows access to sensors mounted directly on motherboards that support Intel chip sets.

  • Download SensorEval Software and Manual
  • Windows XP support is offered for (...)
Simulation model

LM75A IBIS Model

SNOM549.ZIP (33 KB) - IBIS Model
Package Pins Download
SOIC (D) 8 View options
VSSOP (DGK) 8 View options

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