Texas Instruments LM75A IC Digital Temperature Sensor SOIC

The Texas Instruments LM75A IC Digital Temperature Sensor provides 9-bit digital temperature readings with ±2°C accuracy from –25°C to 100°C, making it a practical choice for precise thermal monitoring in electronic systems.

Overview

The LM75A integrates a sigma-delta analogue-to-digital converter and communicates over a 2-wire I2C/SMBus interface, allowing straightforward connection to microcontrollers and other digital logic. The bus can operate at speeds up to 400 kHz, and the device runs from a single supply voltage between 2.7V and 5.5V.

Key Features

• 9-bit digital temperature readings
• Accuracy of ±2°C from –25°C to 100°C and ±3°C from –55°C to 125°C
• Single supply voltage of 2.7V to 5.5V
• 2-wire I2C/SMBus interface with bus speeds up to 400 kHz
• Configurable overtemperature shutdown output (O.S.) with programmable temperature limit and hysteresis
• Programmable fault tolerance to set the number of consecutive error readings before the alarm triggers
• Requires no external components for basic operation
• Low-power shutdown mode for battery-sensitive applications
• Three address pins allow up to eight LM75A sensors on a single I2C bus
• Power-up defaults allow standalone thermostat operation without initial configuration

Applications

The robust performance across wide temperature and voltage ranges suits critical thermal management in base stations and telecommunications equipment, precision electronic test and measurement instruments, office electronics and computer peripherals, and personal computers and servers.

Dimensions and Weight

The product measures 3.3 (width) × 1.5 (depth) × 4.3 (height) and weighs 0.245 gms.