Overview
The LM335AZ is a precision temperature sensor produced by STMicroelectronics. It operates as a 2-terminal Zener diode, with its breakdown voltage directly proportional to the absolute temperature at 10 mV/°K. This sensor is easily calibrated and offers high accuracy, making it suitable for a wide range of temperature sensing applications. The LM335AZ is available in a TO-92 package and is part of the LMx35 series, which includes other models like the LM135 and LM235, each with different operating temperature ranges.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Temperature Range | -40 to 100 | °C |
| Operating Current Range | 450 µA to 5 mA | |
| Dynamic Impedance | Less than 1 Ω | |
| Initial Accuracy | 1 °C | |
| Temperature Coefficient | 10 mV/°K | |
| Package Type | TO-92 | |
| RoHS Compliance | Ecopack2 |
Key Features
- Directly Calibrated in °K: The sensor's output voltage is directly proportional to the absolute temperature in Kelvin.
- High Accuracy: The LM335AZ has an initial accuracy of 1 °C over a 100 °C temperature range.
- Low Dynamic Impedance: Less than 1 Ω, ensuring minimal impact on the circuit.
- Wide Operating Current Range: Operates from 450 µA to 5 mA without significant change in performance.
- Easily Calibrated: Single-point calibration is possible due to the linear output proportional to absolute temperature.
Applications
- Industrial Automation: Temperature monitoring and control in industrial environments.
- Power Supplies: Temperature sensing for power supply units to ensure safe operation.
- Battery Management: Monitoring battery temperatures to optimize performance and safety.
- HVAC Systems: Temperature control and monitoring in heating, ventilation, and air conditioning systems.
- Appliances: Temperature sensing in various household and commercial appliances.
Q & A
- What is the operating temperature range of the LM335AZ?
The LM335AZ operates from -40°C to 100°C.
- What is the typical initial accuracy of the LM335AZ?
The typical initial accuracy is less than 1°C over a 100°C temperature range.
- How does the LM335AZ operate?
It operates as a 2-terminal Zener diode with its breakdown voltage directly proportional to the absolute temperature at 10 mV/°K.
- What is the dynamic impedance of the LM335AZ?
The dynamic impedance is less than 1 Ω.
- What is the operating current range of the LM335AZ?
The operating current range is from 450 µA to 5 mA.
- Is the LM335AZ easily calibrated?
- What package types are available for the LM335AZ?
The LM335AZ is available in a TO-92 package.
- Is the LM335AZ RoHS compliant?
- What are some common applications of the LM335AZ?
- How does self-heating affect the accuracy of the LM335AZ?
