LD271

LD271 GaAs Infrared Emitting Diode Technical Summary

Overview

The LD271 is a high-performance GaAs (Gallium Arsenide) infrared emitting diode designed for applications requiring reliable infrared light emission. Fabricated using advanced semiconductor technology, this component offers excellent efficiency and stability across a wide operating temperature range. With its compact package and robust construction, the LD271 is suitable for both industrial and commercial applications where consistent infrared output is critical.

This diode emits light in the infrared spectrum, typically around 940nm wavelength, making it ideal for use in remote control systems, optical sensors, and other infrared-based communication devices. The device features low forward voltage and high output power, ensuring energy-efficient operation.

Key Features

• GaAs (Gallium Arsenide) semiconductor material for efficient infrared emission
• High reliability and long operational lifetime
• Wavelength: 940nm (typical)
• Low forward voltage for energy-efficient operation
• High radiant intensity output
• Wide operating temperature range: -55°C to +100°C
• Compact package design for easy integration
• Fast switching times for pulse operation
• RoHS compliant and lead-free

Applications

The LD271 infrared emitting diode is suitable for a wide range of applications including:

• Infrared remote control systems (TVs, audio equipment, set-top boxes)
• Optical switches and sensors
• Industrial automation equipment
• Security systems and surveillance equipment
• Bar code scanners
• Optical encoders
• Wireless communication systems
• Medical equipment
• Automotive electronics

Electrical Characteristics

The following table outlines the key electrical characteristics of the LD271 at 25°C unless otherwise specified:

• Reverse Voltage (VR): 5V maximum
• Forward Current (IF): 130mA continuous
• Peak Forward Current (IFP): 1A (pulsed, duty cycle ≤ 10%)
• Forward Voltage (VF): 1.3V typical at IF = 50mA
• Power Dissipation (Pd): 120mW
• Junction Temperature (Tj): 100°C maximum
• Viewing Angle: ±20°
• Radiant Intensity: 20mW/sr typical at IF = 50mA
• Wavelength (λ): 940nm typical
• Rise/Fall Time: 100ns typical

Optical Characteristics

The LD271 offers excellent optical performance characteristics:

• High radiant intensity with narrow beam angle
• Stable wavelength output across temperature variations
• Good linearity between forward current and light output
• Minimal spectral shift with aging

Thermal Characteristics

• Thermal Resistance (Rthj-a): 300°C/W
• Operating Temperature Range: -55°C to +100°C
• Storage Temperature Range: -55°C to +100°C

Package Information

The LD271 is available in a standard 3mm radial leaded package with the following dimensions:

• Package Type: T-1 (3mm) clear lens
• Diameter: 3.0mm ±0.1mm
• Height: 4.5mm ±0.5mm
• Lead Length: 28mm ±2mm
• Lead Diameter: 0.5mm ±0.05mm
• Lens Material: Epoxy resin
• Polarity: Cathode indicated by flat on lens or shorter lead

Reliability Data

The LD271 has undergone extensive reliability testing with the following results:

• Operating Life: >100,000 hours at 25°C
• Temperature Cycling: 100 cycles (-40°C to +85°C) with no failures
• Humidity Resistance: 85°C/85% RH for 1000 hours with no failures
• Solderability: Meets MIL-STD-202, Method 208 requirements

Handling and Mounting Precautions

• Avoid mechanical stress on the leads during assembly
• Recommended soldering temperature: 260°C maximum for 5 seconds
• Do not exceed maximum ratings during operation
• Use proper ESD precautions during handling
• Avoid touching the lens surface to prevent contamination
• Store in anti-static packaging when not in use

Design Considerations

When designing with the LD271, consider the following:

• Use current limiting resistors appropriate for your application
• For pulsed operation, ensure duty cycle does not exceed 10% at maximum current
• Consider heat sinking for high ambient temperature applications
• Optical alignment is critical for maximum efficiency
• Account for temperature effects on output power in critical applications

Environmental Compliance

• RoHS compliant
• Halogen free
• REACH compliant
• WEEE compliant

Ordering Information

The LD271 is available in several packaging options:

• LD271: Single unit in bulk packaging
• LD271-TAPE: Tape and reel packaging for automated assembly
• LD271-100: 100-piece bulk pack