Vishay - VCNL4040: Fully Integrated Proximity and Ambient Light Sensor with Infrared Emitter, I²C Interface, and Interrupt Function

Vishay – VCNL4040: Fully Integrated Proximity and Ambient Light Sensor with Infrared Emitter, I²C Interface, and Interrupt Function

VCNL4040 integrates a proximity sensor (PS), ambient light sensor (ALS), and a high power IRED into one small package. It incorporates photodiodes, amplifiers, and analog to digital converting circuits into a single chip by CMOS process. The 16-bit high resolution ALS offers excellent sensing capabilities with sufficient selections to fulfill most applications whether dark or high transparency lens design. High and low interrupt thresholds can be programmed for both ALS and PS, allowing the component to use a minimal amount of the microcontrollers resources.

The proximity sensor features an intelligent cancellation scheme, so that cross talk phenomenon is eliminated effectively. To accelerate the PS response time, smart persistence prevents the misjudgment of proximity sensing but also keeps a fast response time. In active force mode, a single measurement can be requested, allowing another good approach for more design flexibility to fulfill different kinds of applications with more power saving.

The patented FiltronTM technology achieves ambient light spectral sensitivity closest to real human eye response and offers the best background light cancellation capability (including sunlight) without utilizing the microcontrollers’ resources. VCNL4040 provides an excellent temperature compensation capability for keeping output stable under various temperature configurations. ALS and PS functions are easily set via the simple command format of I²C (SMBus compatible) interface protocol. Operating voltage ranges from 2.5 V to 3.6 V. VCNL4040 is packaged in a lead-free 8-pin molding package, which offers the best market-proven reliability quality.

Features

Package type: surface mount
Dimensions (L x W x H in mm): 4.0 x 2.0 x 1.1
Integrated modules: infrared emitter (IRED), ambient light sensor (ALS), proximity sensor (PS), and signal conditioning IC
Operates ALS and PS in parallel structure
FiltronTM technology adoption for robust background light cancellation
Temperature compensation: -40 °C to +85 °C
Low power consumption I²C (SMBus compatible) interface
Floor life: 168 h, MSL 3, according to J-STD-020
Output type: I²C bus (ALS / PS)
Operation voltage: 2.5 V to 3.6 V

Proximity Function

Immunity to red glow (940 nm IRED)
Programmable IRED sink current
Intelligent cancellation to reduce cross talk phenomenon
Smart persistence scheme to reduce PS response time
Selectable for 12- / 16-bit PS output data

Ambient Light Function

High accuracy of ALS ±10 %
Fluorescent light flicker immunity
Spectrum close to real human eye responses
Selectable maximum detection range (819 / 1638 / 3277 / 6553) lux with highest sensitivity 0.0125 lux/step