Saturday, February 24, 2024

New Proximity Sensor With Ultra-Low 5 μA Idle Current In Compact SMD Package

By Akanksha Sondhi Gaur

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Equipped with VCSEL and intelligent dual I²C Slave address, this device excels in battery-operated consumer products such as TWS earphones and VR/AR headsets.

Vishay Intertechnology, Inc. announced the launch of their latest innovation in the Optoelectronics sector: the Vishay Semiconductors VCNL36828P. This proximity sensor is a game-changer for consumer applications, offering unprecedented efficiency and performance enhancements. This compact sensor is an integration marvel crafted with a vertical-cavity surface-emitting laser (VCSEL). The key features include:

  • Package Format: Surface-Mount Design
  • Measurements (Length x Width x Height in millimeters): 2.0 x 1.0 x 0.5
  • Included Components: Vertical-Cavity Surface-Emitting Laser (VCSEL), Photodiode, Application-Specific Integrated Circuit (ASIC),16-bit ADC and dual I²C slave address feature

This proximity sensor outperforms its predecessors in several key areas. It has a 20% reduction in package size and a 20% decrease in idle current, now only 5 μA. It excels in high sunlight environments with a 40% improved sunlight cancellation capability, reaching up to 140 klx. It delivers superior proximity detection with a detection range of 200 mm and a typical supply voltage of just 1.8 V. It significantly reduces power consumption, making it ideal for space-limited, battery-dependent devices. It is set to revolutionise user interaction in various devices, including smartphones, smartwatches, TWS earphones, VR/AR headsets, and smart glasses. It supports automatic screen wake-up and turn-off functions and detects whether users wear their devices. Its dual I²C slave address design eliminates the need for a multiplexer, reducing costs in these applications.

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Designers will appreciate the sensor’s programmable interrupt function, which allows the setting of high and low thresholds to minimise constant microcontroller communication. It features intelligent cross-talk cancellation and a smart persistence scheme for accurate sensing and quicker response times. Additionally, its VCSEL peaks at 940 nm, avoiding any visible “red-tail”, and aligns with environmental standards, being RoHS-compliant, halogen-free, and Vishay Green. The Vishay Semiconductors VCNL36828P is not just a component; it’s a leap forward in proximity sensor technology, promising to enhance the efficiency and functionality of a wide array of consumer devices.


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