LM35DZ Temperature Sensor TO-92 (Original)

The LM35 integrated circuit is a reliable temperature sensor with reduced dimensions, featuring a 3-pin TO-92 package. Its output is analog and linear with a slope of 10mV/∘C. Consequently, this sensor allows you to measure temperature from −55∘C to 150∘C. This broad range makes it perfect for applications such as thermostats, monitoring systems, and basic thermometers.

The LM35DZ is extremely easy to use; in fact, it does not require additional circuitry to be used effectively. It is powered directly from a $5\text{V}$ supply and delivers an analog output between $0\text{V}$ to $1.5\text{V}$. Furthermore, this analog voltage can be easily read by the ADC of any microcontroller or development board, including Arduino, ESP32, Raspberry Pi Pico, and PICs.

It is a very precise and easy-to-use electronic component because it provides an analog signal directly proportional to the temperature in degrees Celsius. The LM35 is a passive temperature sensor, meaning it uses the energy from the output signal to power itself. Therefore, it is very efficient in terms of power consumption. The LM35 is very sensitive and can measure temperatures with an accuracy of ±0.5∘C. Specifically, it is highly useful in applications requiring accurate temperature measurement, such as temperature control systems, security systems, and measurement equipment.

Key Features

• Calibrated directly in Celsius with a scale factor of 10 mV/∘C.
• Guaranteed accuracy of ±0.5∘C at 25∘C and ±43​∘C over the full −55∘C to +150∘C range.
• Operates from 4 V to 30 V without external components.
• Low quiescent current draw ($<60\mu \text{A}$) minimizes self-heating (<0.1∘C in still air).
• Low output impedance ($0.1\Omega$ for a $1\text{ mA}$ load) for easy interface to ADCs and microcontrollers.
• Nonlinearity is typically ±41​∘C over the full temperature span.

Applications

• Precision temperature measurement in industrial control systems.

• Over-temperature protection in power supplies and inverters.

• Environmental monitoring in HVAC and weather stations.

• Thermal compensation circuits in analog signal chains.

• Embedded systems and microcontroller-based data logging.

Package Contents

• 1x LM35DZ Temperature Sensor, TO-92.