Proximity sensors drop power consumption to 6µA

16th January 2020
Source: Vishay
Posted By : Mick Elliott
Proximity sensors drop power consumption to 6µA

The Optoelectronics Group of Vishay Intertechnology has introduced two fully integrated proximity sensors designed to increase efficiency and performance in consumer and industrial applications. They feature an IR emitter and a vertical cavity surface-emitting laser (VCSEL).

The Vishay Semiconductors VCNL36821S and VCNL36826S each combine a photodiode, signal processing IC, and 12-bit ADC in a compact 2.55 mm by 2.05 mm by 1.0 mm surface-mount package.

Compared to previous-generation devices, these proximity sensors offer smaller packages at a lower cost, making them ideal for space-constrained battery-powered applications, such as detecting if users are wearing or not wearing earpods or virtual reality / augmented reality (VR / AR) headsets.

With ranges to 300mm, they also provide collision detection in toys and consumer and industrial robots. The sensors feature low power consumption down to 6 µA to increase efficiency in these applications.

The devices support the I²C bus communication interface for easy access to the proximity signal, while their programmable interrupt function allows designers to specify high and low thresholds to reduce the continuous communication with the microcontroller.

The proximity sensors use intelligent cancellation to eliminate cross-talk, while a smart persistence scheme ensures accurate sensing and faster response time. The IRED and VCSEL wavelengths peak at 940nm and have no visible "red-tail."

The VCNL36821S and VCNL36826S offer temperature compensation from -40°C to +85°C, and a Moisture Sensitivity Level (MSL) of 3 — in accordance with J-STD-020 — for a floor life of 168 hours. The sensors are RoHS-compliant, halogen-free, and Vishay Green.

Downloads


You must be logged in to comment

Write a comment

No comments




Sign up to view our publications

Sign up

Sign up to view our downloads

Sign up

Vietnam International Defense & Security Exhibition 2020
4th March 2020
Vietnam National Convention Center, Hanoi
Wearable Tech Show 2020
10th March 2020
United Kingdom The Business Design Centre, London
IoT Tech Expo 2020
17th March 2020
United Kingdom Olympia London
LOPEC 2020
24th March 2020
Germany Messe München
PCIM 2020
5th May 2020
Germany Messe Nuremberg