±2°C, 2.7V to 5.5V industry standard temperature sensor with I2C/SMBus interface

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Product details

Parameters

Local sensor accuracy (Max) (+/- C) 2 Operating temperature range (C) -55 to 125 Supply voltage (Min) (V) 2.7 Interface type I2C, SMBus, 2-Wire 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 open-in-new Find other Digital temperature sensors

Package | Pins | Size

SOIC (D) 8 19 mm² 4.9 x 3.9 VSSOP (DGK) 8 15 mm² 3 x 4.9 open-in-new Find other Digital temperature sensors

Features

  • 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)
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Description

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
* Datasheet LM75A Digital Temperature Sensor and Thermal Watchdog With Two-Wire Interface datasheet (Rev. P) Dec. 30, 2014
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
Application notes Temperature sensors: PCB guidelines for surface mount devices (Rev. A) Jan. 18, 2019
Technical articles How sensor technology is evolving to meet cold chain needs Jun. 18, 2018
Application notes Applying I2C-Compatible Temperature Sensors in Systems With Slow Clock Edges (Rev. A) May 06, 2013
User guides LM75A User’s Guide Jan. 17, 2013
User guides LM75AEB User’s Guide (Rev. A) Aug. 24, 2012
Application notes Tiny Temperature Sensors for Remote Systems Feb. 17, 2003

Design & development

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

Software development

DRIVERS & LIBRARIES Download
Linux Driver for I2C temperature sensors
LM75SW-LINUX 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
  • (...)
DRIVERS & LIBRARIES Download
Eval Board Software For Hardware Monitors And Digital Temperature Sensors
SENSOREVAL 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 (...)

Design tools & simulation

SIMULATION MODELS Download
SNOM549.ZIP (33 KB) - IBIS Model

CAD/CAE symbols

Package Pins Download
SOIC (D) 8 View options
VSSOP (DGK) 8 View options

Ordering & quality

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