VCNL3040 – Infrared Proximity Sensor and I2C Interface QFN-8

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Infrared Proximity Sensor With Integrated IRED And I2C Interface For Contactless Detection Applications
The VCNL3040 is a compact infrared proximity sensor that integrates a proximity sensing element and a high-power infrared emitter into a single QFN-8 package. Built using advanced CMOS technology, the device combines photodiodes, amplifiers, and analog-to-digital conversion circuitry to provide accurate and reliable proximity detection while minimizing board space requirements. Its highly integrated design simplifies system implementation and reduces external component count, making it ideal for compact electronic devices.
The sensor features programmable high and low interrupt thresholds, enabling efficient event-driven operation and reducing microcontroller workload for improved power efficiency. Advanced proximity sensing capabilities include programmable 12-bit and 16-bit resolution, intelligent crosstalk cancellation, smart persistence filtering, and active force mode for single-shot measurements. The I2C SMBus-compatible interface ensures easy integration with embedded systems, while the low operating voltage range of 2.5 V to 3.6 V makes the VCNL3040 suitable for battery-powered and portable applications.
Key Features

Integrated Proximity Sensor and IRED: Combines infrared emitter and proximity sensing in one package.
Programmable Proximity Resolution: Supports 12-bit and 16-bit proximity measurements.
High-Power Infrared Emitter: Reliable object and presence detection.
Intelligent Crosstalk Cancellation: Minimizes false triggering caused by optical interference.
Smart Persistence Filtering: Improves sensing accuracy while maintaining fast response times.
Programmable Interrupt Thresholds: Independent high and low threshold settings.
Active Force Mode: Supports single-shot measurements for reduced power consumption.
I2C SMBus Compatible Interface: Simple communication with microcontrollers.
Low Power Operation: Optimized for battery-powered systems.
Wide Operating Voltage Range: Operates from 2.5 V to 3.6 V.
Compact QFN-8 Package: Suitable for space-constrained electronic designs.
Pb-Free Construction: Environmentally compliant package.

Applications

Smartphone proximity sensing
Tablet and laptop detection systems
Touchless user interfaces
Smart home devices
Wearable electronics
Consumer electronics
Industrial automation equipment
Occupancy detection systems
Presence sensing applications
IoT devices
Contactless control panels
Battery-powered products