LM35DZ Temperature Sensor TO-92 (Original)
The LM35 integrated circuit is a temperature sensor with reduced dimensions, it has a 3-pin TO-92 package. Its output is analog and linear with a slope of 10mV /ºC. It allows you to measure temperature from −55°C to 150°C, it will help you carry out applications such as thermometers, thermostats, monitoring systems and more. The LM35DZ is easy to use, it does not require additional circuitry to be used. It is powered directly from a 5V supply and delivers an analog output between 0V to 1.5V. This analog voltage can be read by the ADC of a microcontroller or development board such as Arduino, ESP32, Raspberry Pi Pico, PICs and more.
It is a very precise and easy to use electronic component, as it provides an analog signal directly proportional to the temperature in degrees Celsius. The LM35 is a passive temperature sensor, meaning it does not need any external power supply to operate. Instead, it uses the energy from the output signal to power itself, making it very efficient in terms of power consumption. The LM35 is very sensitive and can measure temperatures with an accuracy of ±0.5 degrees Celsius. It is very useful in applications where accurate temperature measurement is required, such as temperature control systems, security systems and measurement equipment.
Features
- Calibrated directly in Celsius with a scale factor of 10 mV/°C.
- Guaranteed accuracy of ±0.5 °C at 25 °C and ±¾ °C over full –55 °C to +150 °C range.
- Operates from 4 V to 30 V without external components.
- Low quiescent current draw (< 60 µA) minimizes self-heating (< 0.1 °C in still air).
- Low output impedance (0.1 Ω for a 1 mA load) for easy interface to ADCs and microcontrollers.
- Nonlinearity typically ±¼ °C over full temperature span.
Specifications
| Parameter | Value |
|---|---|
| Model | LM35DZ |
| Output Scale Factor | 10 mV/°C |
| Supply Voltage Range | 4 V to 30 V DC |
| Operating Temperature Range | –55 °C to +150 °C |
| Accuracy (25 °C) | ±0.5 °C |
| Non-linearity (full range) | ±0.25 °C (typical) |
| Quiescent Current | < 60 µA |
| Output Impedance | 0.1 Ω @ 1 mA load |
| Package | TO-92 plastic transistor style |
| Thermal Time Constant (τ) | ~0.5 s (in still air, TO-92 with heat sink) |
PINOUT
| Pin Number | Pin Name | Description |
| 1 | Vcc | Input voltage is +5V for typical applications |
| 2 | Analog Out | There will be increase in 10mV for raise of every 1°C. Can range from -1V(-55°C) to 6V(150°C) |
| 3 | Ground | Connected to ground of circuit |
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.
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