Sharp Microelectronics GP2A230LRSAF Reflective Optical Sensor, OPIC Digital Output, 1-9mm Detection Range, 3-Pin Connector

The Sharp Microelectronics GP2A230LRSAF operates from a 4.5V to 5.5V DC power supply. It is designed for standard 5V logic systems commonly found with microcontrollers like Arduino, Raspberry Pi, and industrial PLCs. Ensuring the supply voltage stays within this specified range is critical for reliable output signal integrity and long-term sensor stability.

The OPIC (Optical IC) output integrates a modulated light source and a synchronous detection circuit within the sensor. This technology allows the device to distinguish its own emitted infrared signal from ambient light, dramatically reducing false triggers caused by sunlight or room lighting. The result is a clean, digital output signal that provides high reliability in variable lighting conditions.

The detection range depends on the reflectivity of the target surface. For highly reflective white paper, the sensor reliably detects objects between 1mm and 9mm away. For less reflective black paper, the effective range narrows to approximately 3mm to 7mm. Objects must be positioned within this focal plane for consistent activation of the digital output signal.

The module includes a positioning pin to prevent rotational misalignment during PCB mounting. Specific models (GP2A230LRSAF, GP2A231LRSAF) also feature snap-mount hooks for secure panel mounting without screws. For the most stable installation, ensure the target path is perpendicular to the sensor face and within the specified focal distance for optimal performance.

Yes, the OPIC output provides a digital signal that can be read directly by a microcontroller's GPIO pin configured as a digital input. The output typically switches between a logic low (detection) and logic high (no detection) state. No additional signal conditioning is required, making it a simple drop-in component for proximity sensing applications.