Featuring Filtron technology, the VCNL4040 integrates an IR emitter, photo detectors for proximity and ambient light, a signal processing IC and a 16-bit ADC. The device is available in a surface-mount packages measuring only 4mm x 2mm x 1.1mm. It supports I²C bus communications interface for easier window and sensor placement.
The ambient light sensor has 16-bit high resolution with sufficient flexibility to suit the demands of most applications. Filtron technology achieves ambient light spectrum sensitivity close to real human eye responses, with fluorescent light flicker immunity. The proximity function offers immunity to red glow (940nm IRED) and has an intelligent cancellation scheme that reduces crosstalk and a smart persistence scheme to reduce response time. Both the ALS and proximity sensor (PS) operate in parallel, and can be programmed for high and low interrupt thresholds.