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Compact VCSEL Proximity Sensor for Superior Directivity and Light Reception with Miniaturization and Battery Enhancement

VCSEL Proximity Sensor
VCSEL Proximity Sensor

ROHM has revealed the RPR-0720, an optical sensor module utilizing a VCSEL with higher directivity compared to LEDs as the light-emitting element and a sensor IC as the light-receiving element. The module's size has been significantly reduced through optimization of the module structure using in-house chips, achieving a reduction in the area by approximately 78% measuring 2.0mm × 1.0mm. This sensor is designed to cater to applications requiring attachment/detachment and proximity detection.

The RPR-0720 features a wide input voltage range of 2.7V to 4.5V for the built-in VCSEL. This eliminates the need for a peripheral voltage booster circuit when using a Li-ion battery, resulting in space savings. These space savings contribute to smaller applications and increased battery capacity, making the RPR-0720 suitable not only for attachment/detachment sensing but also for detecting various conditions across a wide range of applications.



  • Compatible with I2C bus interface (f/s mode support)
  • Compatible with 1.8V or 3.3V logic interface
  • Directly connected to IrVCSEL input power supply battery (VVCSELA Max. 4.5V @ VCC=1.8V)
  • The detection range of the proximity sensor is around 1 - 15mm (adjustable by I2C)
  • Built-in constant current configurable IrVCSEL driver
  • Equipped with Ambient light canceling function
  • Low light leakage inside the product using a micro slit



  • Refrigerators
  • Ventilation fans
  • Fan motors
  • Wireless Earbuds
  • Hearing Aids
  • Smartphones
  • Mobile Phones
  • Game Machines
  • Wearable Devices
  • AR/VR Devices
  • Digital Still Cameras


Availability and Pricing

The RPR-0720 proximity sensors are available at the price of $3.0/unit.

Component Datasheet

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