Industrial Electronics

New proximity sensor with vertical-cavity surface-emitting laser

04 May 2021

New Yorker Electronics has released the new Vishay Optoelectronics fully integrated proximity sensor designed to increase efficiency and performance in consumer and industrial applications. Featuring a vertical-cavity surface-emitting laser (VCSEL), the Vishay Semiconductors VCNL36825T combines a photodiode, signal processing integrated circuit and 12-bit analog-to-digital converter in a compact 2.0 mm by 1.25 mm by 0.5 mm surface-mount package with a small 1.6 mm light hole.

The Vishay VCNL36825T integrates a proximity sensor and a VCSEL into one small package available in tape and reel. It incorporates photodiodes, amplifiers and analog to digital converting circuits into a single chip by complementary metal-oxide semiconductor process. Proximity sensor programmable interrupt features of individual high and low thresholds offer the best utilization of resource and power saving on the microcontroller.

Compared to previous-generation devices, the VCNL36825T offers a 76% smaller package, while its Source: New Yorker ElectronicsSource: New Yorker Electronicsreduced light hole opening provides increased design flexibility, at a lower cost. The device’s small size makes it ideal for space-constrained battery-powered applications. A programmable interrupt function allows designers to specify high and low thresholds to reduce the continuous communication with the microcontroller.

The Vishay device’s proximity functions include an immunity to red glow (940 nm infrared emitting diode), a programmable IVCSEL sink current and an intelligent cancellation to reduce cross talk. Their smart persistence scheme reduces sensor response time with a low power consumption mode and sunlight cancellation up to 100 klx. It has a programmable interrupt function with upper and lower thresholds and an adjustable persistence to prevent false triggers.

To contact the author of this article, email GlobalSpecEditors@globalspec.com


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