Overview
The LM335ADT from STMicroelectronics is a precision temperature sensor that operates as a 2-terminal Zener diode. The breakdown voltage of the LM335 is directly proportional to the absolute temperature, with a linear output of 10mV/°K. This sensor is part of the LM135, LM235, and LM335 family, known for their ease of calibration and high accuracy. The LM335ADT is specifically packaged in an SO-8 package, making it suitable for various industrial and consumer applications where precise temperature sensing is required.
Key Specifications
| Parameter | Unit | Min | Max | |
|---|---|---|---|---|
| Operating Temperature Range | °C | -40 | - | 100 |
| Operating Current Range | mA | 0.45 | - | 5 |
| Dynamic Impedance | Ω | - | <1 | - |
| Temperature Error at 25°C Calibration | °C | - | 1 | 2 |
| Output Voltage Change with Current | mV | - | - | 10 |
| Output Voltage Temperature Drift | mV/°C | - | 10 | - |
| Package Type | - | - | SO-8 | - |
| RoHS Compliance | - | - | Ecopack3 | - |
Key Features
- Directly calibrated in °K
- Operates from 450µA to 5mA
- 1°C initial accuracy
- Less than 1Ω dynamic impedance
- Linear output
- Easily calibrated for higher accuracies
- Available in ECOPACK® packages for environmental compliance
Applications
The LM335ADT is suitable for a wide range of applications, including:
- Industrial temperature sensing
- Power supplies
- Battery management systems
- HVAC systems
- Appliances
- Temperature controllers and thermometers
- Differential temperature sensing and thermocouple cold junction compensation
Q & A
- What is the operating temperature range of the LM335ADT?
The LM335ADT operates from -40°C to 100°C. - What is the typical current range for the LM335ADT?
The LM335ADT operates from 450µA to 5mA. - What is the dynamic impedance of the LM335ADT?
The dynamic impedance is less than 1Ω. - How accurate is the LM335ADT at 25°C calibration?
The LM335ADT has a typical error of less than 1°C over a 100°C temperature range. - What is the output voltage temperature drift of the LM335ADT?
The output voltage temperature drift is 10mV/°C. - In what package is the LM335ADT available?
The LM335ADT is available in an SO-8 package. - Is the LM335ADT RoHS compliant?
Yes, the LM335ADT is RoHS compliant with an Ecopack3 rating. - How can the LM335ADT be calibrated for higher accuracy?
The LM335ADT can be calibrated using a single-point calibration method, adjusting the slope at one temperature to correct errors at all temperatures. - What are some common applications of the LM335ADT?
Common applications include industrial temperature sensing, power supplies, battery management, HVAC systems, appliances, and temperature controllers. - Does the LM335ADT have a linear output?
Yes, the LM335ADT has a linear output proportional to absolute temperature.
