The RPR-359FC is a reflective photosensor, developed by Rohm Semiconductor, integrating an infrared LED and a phototransistor in a compact, surface-mountable package. Its primary function is to detect the presence or proximity of an object by sensing the amount of infrared light reflected from its surface.

Applications:

• Proximity sensing in smartphones and tablets
• Object detection in industrial automation equipment
• Gaming controllers
• Robotics for obstacle avoidance
• Optical encoders

Features:

• Compact surface-mount design
• Integrated IR emitter and detector
• High sensitivity
• Fast response time
• Low power consumption

Benefits:

• Simplified integration due to its compact size
• Accurate and reliable object detection
• Low power consumption, ideal for battery-operated devices

The RPR-359FC operates by emitting infrared light from the integrated LED. When an object is within the sensor's detection range, the infrared light reflects off the object and is detected by the integrated phototransistor. The output current from the phototransistor varies depending on the amount of reflected light, allowing the system to determine the presence and proximity of the object. Careful consideration of the object's surface reflectivity and ambient light conditions is required for optimal performance.

Technical Specifications:

The RPR-359FC has a peak emission wavelength typically around 940nm. It requires a supply voltage of around 3 to 5 volts for proper operation. The operating temperature range is usually from -25°C to +85°C. The package type is a surface-mount device (SMD), suitable for automated assembly processes. The output signal from the phototransistor is an analog current proportional to the received IR intensity. The sensor's sensitivity and range are influenced by factors like the object's reflectivity, ambient light, and the distance between the sensor and the object.