VCNL4020 Optical Sensor

Product Highlights > VCNL4020 Optical Sensor

            VCNL4020 Optical Sensor 
                    Vishay's fully-integrated, proximity and ambient-light optical sensor with power-saving interrupt function in a compact package
    

Image of Vishay Semiconductor/Opto Division's VCNL4020 Optical Sensor Vishay Semiconductor's announces a fully-integrated proximity and ambient-light optical sensor with the industry's lowest height of 0.8 mm. The VCNL4020 combines an IR emitter, a photo-pin-diode for proximity, an ambient light detector, a signal processing IC, and a 16-bit ADC in one small 4.8 mm x 2.3 mm x 0.8 mm rectangular lead-less (LLP) package. The 3-in-1 sensor features an interrupt function, supports I²C bus communication interface, and greatly simplifies window and sensor placement in a wide variety of consumer and industrial applications.

Containing all the circuitry needed for portable electronics in one device, the fully-integrated VCNL4020 eliminates the need for additional light barriers and optical alignment of the IR emitter and photo diode. The VCNL4020's interrupt function enables the sensor to work independently until a predefined proximity or ambient light event occurs and then wakes up the microcontroller. This helps customers reduce their software effort and lower their power consumption by eliminating polling communication traffic between the sensor and microcontroller.

Benefits

Small, 4.8 mm x 2.3 rectangular LLP package with an ultra-low 0.8 mm profile
Combines an IR emitter, proximity PIN photodiode, and an ambient light sensor
Signal-processing IC
16-bit ADC compensates for signal loss through the sensor window
Interrupt function lowers power consumption
Supports an easy-to-use I²C bus communication interface
Proximity function:
- 16-bit effective resolution for proximity detection ensures excellent cross-talk immunity
- Operates at depths or air gaps of up to 10 mm
- Programmable LED drive current from 10 mA to 200 mA (in 10 mA steps) allows object detection up to 200 mm
- Drives external emitters for longer range
- Offers excellent ambient light suppression by signal modulation

Applications

Proximity sensor for touch screen locking
Ambient light function for display/keypad adaptive brightness control
End products include mobile devices such as smart phones, touch phones, PDAs, GPS units, and digital cameras, in addition to computing and industrial devices and displays

Ambient light function:
- 16-bit dynamic range for ambient light detection from 0.25 lux to 16 klux
- Offers 100 Hz and 120 Hz flicker noise rejection
Low stand-by current consumption of 1.5 μA
Supply voltage range of 2.5 V to 3.6 V
I²C bus voltage range from 1.7 V to 5 V
Operates over a temperature range of - 25 °C to + 85 °C
Provides a Moisture Sensitivity Level (MSL) of 4
Compliant to RoHS Directive 2011/65/EU and WEEE 2002/96/EC
Halogen-free
Compatible with lead (Pb)-free soldering
An available demo kit allows designers to quickly and easily evaluate the sensor in their applications