The RPR-0512RS is a reflective photosensor manufactured by Rohm Semiconductor. It integrates an infrared LED and a phototransistor into a single compact package. This sensor is designed to detect the presence or absence of an object by measuring the amount of infrared light reflected back to the sensor.

Applications:

• Object detection in printers and copiers
• Paper detection in printers and copiers
• Robotics
• Automated guided vehicles (AGVs)
• Gaming consoles
• Amusement machines

Features:

• Compact surface-mount package
• Built-in infrared LED and phototransistor
• High sensitivity to reflected infrared light
• Fast response time
• Low current consumption

Benefits:

• Simplified object detection design
• Reduced component count and board space
• Reliable and accurate detection
• Low power consumption, suitable for battery-powered applications

The RPR-0512RS functions by emitting infrared light from the integrated LED. When an object is present within the sensor's detection range, a portion of the emitted light is reflected back towards the phototransistor. The phototransistor detects the reflected light and generates a current proportional to the light intensity. This current can then be measured by external circuitry to determine the presence or absence of the object.

Technical Specifications:

The peak emission wavelength of the infrared LED is typically around 940nm. The collector-emitter voltage (VCE) and collector current (IC) of the phototransistor have specified maximum ratings. The operating temperature range is typically from -25°C to +85°C. The package is designed for surface mount technology (SMT). The forward current for the LED is typically around 20mA. The sensor's output is an analog signal, proportional to the intensity of the received IR reflection.