RPR-0720 (New)
Miniature Proximity Sensor

RPR-0720 is a digital optical proximity sensor (PS) module equipped with infrared VCSEL (IrVCSEL) and IC with I2C interface. This IC has a built-in infrared receiver and VCSEL driver. Proximity sensor (PS) detects the human or object approaching by the reflection of IrVCSEL light.

Product Detail

Part Number | RPR-0720
Status | Recommended
Package | RPR-0720
Unit Quantity | 4000
Minimum Package Quantity | 4000
Packing Type | Taping
RoHS | Yes




Integrated Capabilities


Supply Voltage VDD/VCC[V]


Supply Voltage LEDA/VCSELA[V]


Temperature Range[°C]

-30 to 85

Focus Length (Recommended Operating Distances)[mm]


Emitter WaveLength (Typ.)[nm]


Package Size [mm]

2.0×1.0 (t=0.55)

Package Type


Find Similar


  • Compatible to I²C bus interface (f/s mode support)
  • Compatible to 1.8V or 3.3V logic interface
  • Directly connected to the IrVCSEL input power supply battery
    (VVCSELA Max.4.5V@VCC=1.8V)
  • Detection range of 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 micro slit

Supporting Information



The RPR-0720 is an optical sensor module that adopts a VCSEL featuring higher directivity than LEDs as the light emitting element and a sensor IC for the light receiving element. Compact size is achieved by optimizing the module structure using in-house chips, reducing area by approximately 78% compared to conventional products. At the same time, the wide input voltage range (2.7V to 4.5V) of the built-in VCSEL eliminates the need for a peripheral voltage booster circuit (i.e. consisting of a power supply IC, three capacitors, and one inductor) when using a Li-ion battery, contributing to greater space savings that leads to smaller applications and increased battery capacity. This makes it suitable not only for sensing attachment/detachment, but also for detecting various conditions in a wide range of applications.

Appearance and Structural Comparison of ROHM’s Proximity Sensor
Application Circuit Comparison Example

Application Examples

Suitable for a wide range of applications that use light reflection to detect conditions.
◆ Attachment/detachment detection of wireless ear buds, smart watches, gaming console controllers, VR headsets, and the like
◆ Paper detection in printers, copiers, shredders, and other office automation devices
◆ E-cigarette cartridge/liquid detection
◆ Detecting various conditions in smartphones and laptops

Reference Design / Application Evaluation Kit

    • Evaluation Board - RPR-0720-EVK
    • RPR-0720-EVK is an evaluation board for RPR-0720

  • User Guide

Most Viewed