Compact sensor module provides reliable proximity detection in consumer devices

The ROHM Semiconductor RPR-0720 infrared module can detect the presence of objects at a range of up to 15 mm. An on-chip I2C interface makes the sensor controllable by any microcontroller.

The ROHM Semiconductor RPR-0720 is an integrated infrared (IR) proximity sensor module which combines an emitter and receiver in a single small package. 

The RPR-0720’s emitter is an IR vertical-cavity surface-emitting laser. The chip’s built-in IR receiver detects the approach of a person or other object by measuring the rate of reflection of IR light emitted by the VCSEL, over a range between 1 mm and 15 mm. The proximity sensing range is controllable by the system designer via its I2C interface. 

The RPR-0720 measures 2.0 mm x 1.0 mm x 0.55 mm.

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