As the use of the IoT continues to grow, sensor devices that deliver greater miniaturisation and enhanced levels of functionality are required.
ROHM is now offering a lineup of proximity sensors that combine light emitting and receiving elements in a single package that are suitable for wearable devices.
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.
Its compact size has been achieved by optimising the module structure using in-house chips, reducing area by approximately 78% compared to conventional products.
In addition, 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 the device suitable not only for sensing attachment/detachment, but also for detecting various conditions in a wide range of applications.
