LM335AZ Overview
The LM335AZ is a precision temperature sensor designed to provide an accurate and linear output voltage directly proportional to the Kelvin temperature scale. This device operates with a simple two-terminal connection and can be easily integrated into various electronic systems requiring reliable temperature monitoring. With a wide operating voltage range and low power consumption, it is optimized for industrial, automotive, and consumer applications. The LM335AZ offers robust performance with a typical calibration accuracy of ??1??C at room temperature, making it ideal for precision temperature measurement tasks. For more detailed information, visit IC Manufacturer.
LM335AZ Technical Specifications
| Parameter | Specification |
|---|---|
| Operating Voltage Range | 4 V to 30 V |
| Output Voltage | 10 mV/K (Kelvin temperature scale) |
| Calibration Accuracy | ??1??C (typical at 25??C) |
| Operating Temperature Range | -40??C to +100??C |
| Current Consumption | 400 ??A (typical) |
| Output Impedance | Low, suitable for direct ADC interface |
| Package Type | TO-92 (plastic package) |
| Linearity | ??1??C over full temperature range |
LM335AZ Key Features
- Precision Temperature Sensing: Provides a linear output voltage proportional to absolute temperature, enabling straightforward temperature monitoring without complex signal conditioning.
- Wide Operating Voltage Range: Functions reliably between 4 V and 30 V, enhancing flexibility for integration in diverse power environments.
- Low Power Consumption: Typical current draw of 400 ??A reduces power overhead in battery-powered and energy-sensitive designs.
- Robust Accuracy and Linearity: Calibrated to ??1??C accuracy at room temperature with excellent linearity across the full temperature range for consistent readings.
Typical Applications
- Industrial Temperature Monitoring: Ideal for temperature sensing in manufacturing processes, HVAC systems, and environmental control due to its precision and reliability.
- Automotive Systems: Used in engine temperature sensing and battery management systems where accurate thermal data is critical for safety and performance.
- Consumer Electronics: Suitable for temperature compensation and thermal regulation in household appliances and portable devices.
- Embedded Systems: Easily integrated with microcontrollers for real-time temperature monitoring and control in IoT and automation applications.
LM335AZ Advantages vs Typical Alternatives
This temperature sensor provides a direct Kelvin-scale voltage output, eliminating the need for complex conversions typical of thermistors or RTDs. It features superior linearity and accuracy with minimal external components, reducing design complexity and cost. Its low power consumption and wide voltage operation make it more adaptable than many alternatives, while the robust TO-92 package ensures durability in harsh industrial environments.
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LM335AZ Brand Info
The LM335AZ is a precision temperature sensor originally developed by National Semiconductor, now part of Texas Instruments. Recognized for its reliable performance and ease of integration, this device is widely adopted across industries requiring accurate temperature sensing. Texas Instruments continues to manufacture and support the LM335AZ, offering comprehensive datasheets and technical resources to assist engineers in efficient design implementation.
FAQ
What is the principle of operation for the LM335AZ temperature sensor?
The device operates as a temperature-dependent voltage source, outputting a voltage linearly proportional to absolute temperature in Kelvin. It leverages the temperature characteristics of a semiconductor diode junction, producing 10 mV per degree Kelvin, enabling direct and accurate temperature measurement without additional signal processing.
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How do I connect the LM335AZ in a circuit for temperature measurement?
The sensor uses a simple two-terminal connection. One terminal is connected to a stable voltage supply between 4 V and 30 V, and the other is connected to ground via a resistor to set the appropriate current. The output voltage can then be read directly by an analog-to-digital converter or voltmeter for temperature calculation.
Can the LM335AZ be used in low voltage applications?
Yes, it operates down to 4 V minimum, making it suitable for many low voltage systems. However, proper resistor sizing is required to maintain the recommended operating current and ensure accurate temperature readings.