LM335Z Temperature Sensor – Precision Temperature Measurement – TO-92 Package

LM335Z Overview

The LM335Z is a precision temperature sensor designed for accurate ambient temperature measurement in industrial and consumer electronics. It operates as a three-terminal device that functions like a Zener diode with a voltage output proportional to absolute temperature (Kelvin scale). With a wide operating temperature range and simple calibration, this sensor is ideal for systems requiring reliable temperature monitoring and compensation. Its robust design and linear output make it suitable for integration into various temperature-sensitive applications. For sourcing and technical details, visit IC Manufacturer.

LM335Z Technical Specifications

Parameter	Specification
Operating Temperature Range	-40??C to +100??C
Output Voltage	2.98 V at 25??C
Voltage Temperature Coefficient	10 mV/K
Calibration Accuracy	??1??C (typical)
Operating Current	400 ??A to 5 mA
Package Type	TO-92 (LM335Z)
Line Regulation	0.01 mV/V
Noise Voltage	30 ??V RMS (0.1 Hz to 10 Hz)
Thermal Resistance	??100??C/W

LM335Z Key Features

• Linear voltage output proportional to absolute temperature: Enables straightforward temperature measurement with minimal signal conditioning.
• Wide operating temperature range: Suitable for harsh environments and industrial applications requiring reliable performance from -40??C to +100??C.
• Low operating current: Supports energy-efficient designs without compromising sensor accuracy.
• Simple three-terminal interface: Facilitates easy integration into existing circuits and systems with minimal external components.
• Stable calibration: Ensures consistent temperature readings over time and environmental changes.
• Robust TO-92 package: Provides reliable mechanical and thermal protection for industrial use.

Typical Applications

• Environmental monitoring systems requiring precise ambient temperature measurement and control across a wide temperature range.
• Industrial process control equipment for temperature compensation and system diagnostics.
• Consumer electronics needing reliable thermal feedback for device protection or user interface enhancements.
• Battery management systems where temperature monitoring is crucial for safety and efficiency optimization.

LM335Z Advantages vs Typical Alternatives

This temperature sensor offers superior linearity and accuracy compared to typical thermistors or diode-based sensors, providing a direct voltage output proportional to absolute temperature. Its low power consumption and stable calibration improve overall system reliability and reduce the complexity of signal conditioning. The TO-92 package ensures durability and ease of handling, making it a preferred choice for engineers requiring precise, cost-effective temperature sensing solutions.

LM335Z Brand Info

The LM335Z is a well-established temperature sensor originally developed by National Semiconductor, now part of Texas Instruments. This product is widely recognized for its precision and reliability in temperature measurement applications. Texas Instruments continues to manufacture and support the LM335Z, offering datasheets, application notes, and design resources to assist engineers and sourcing specialists in integrating this sensor into their systems efficiently.

FAQ

What is the typical output voltage of the LM335Z at room temperature?

The LM335Z typically outputs approximately 2.98 volts at 25??C. This voltage is directly proportional to the absolute temperature, with a scaling factor of about 10 mV per Kelvin, enabling straightforward temperature calculation.

How should the LM335Z be powered for optimal performance?

The sensor operates reliably across a current range from 400 ??A up to 5 mA. Maintaining the device current within this range ensures stable and accurate temperature readings, while minimizing self-heating effects that could affect measurement accuracy.

Can the LM335Z operate in extreme temperature conditions?

Yes, it is designed to function accurately within a temperature range of -40??C to +100??C, making it suitable for many industrial and environmental applications that require robust performance under varying thermal conditions.

What type of package does the LM335Z come in and why is it beneficial?

The sensor is housed in a TO-92 package, which offers good mechanical protection and thermal dissipation. This package