This application note explains how to design the VCNL4200 integrated proximity and ambient light sensor into an application, covering operation, pin…
The VCNL4200 is a fully integrated proximity and ambient light sensor that combines an infrared emitter, photodiode, and signal processing IC in a single 8.0 mm by 3.0 mm leadless package. It features a 16-bit ADC for ambient light sensing and a 12-bit or 16-bit ADC for proximity measurement, allowing object detection up to 1.5 meters (60 inches). The device uses a standard I2C bus interface and includes a programmable interrupt function to reduce microcontroller processing overhead.
| Package Dimensions | 8.0 mm by 3.0 mm leadless package (LLP) with a height of 1.8 mm |
|---|---|
| Proximity Detection Range | up to 1.5 m (60") |
| Infrared Emitter Peak Wavelength | 940 nm |
| Ambient Light Sensor Peak Sensitivity | 540 nm |
| Power Supply Range (ASIC) | 2.5 V to 3.6 V |
| I2C Interface | Standard I2C bus serial digital interface |
The device can recognize objects up to a distance of 1.5 meters (60 inches).
The integrated infrared emitter has a peak wavelength of 940 nm.
The power supply for the ASIC (V DD) has a defined range from 2.5 V to 3.6 V.
The ASIC delivers a current within 50 mA of being high enough to drive a small external FET, but an external driver is often used for the IRED cathode.