Malvern, Pa. — The Optoelectronics group of Vishay Intertechnology, Inc. offers a new AEC-Q101-qualified, fully integrated proximity and ambient light optical sensor with an industry-high operating temperature range to +105 °C. The VCNL4020X01 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 compact design simplifies window and sensor placement in a wide variety of automotive, consumer, and industrial applications. The three-in-one sensor features an interrupt function, and supports I²C bus communication interface.
For automotive dashboard displays and mobile devices such as smartphones, tablets, PDAs, and GPS units, the Vishay Semiconductors VCNL4020X01 saves power as a proximity sensor by turning off the display backlight until a user is detected while using its integrated ambient light function for display/keypad adaptive brightness control and rearview mirror dimming. By incorporating all the circuitry needed for these applications in one device, the VCNL4020X01 eliminates the need for additional light barriers and optical alignment of the IR emitter and photo diode, said Vishay.
While other devices use chip-on-printed-circuit-board technology that results in package heights of 1.2 mm or greater, the VCNL4020X01 uses a proprietary technology that delivers the lowest height on the market, giving design engineers greater flexibility in where and how they locate the sensor, said Vishay.
For greater flexibility, the VCNL4020X01 can function at any depth or air gap below the glass window, unlike devices with 8-, 10-, and 12-bit resolutions that require depths or air gaps of 1.5 mm or less. Lower-resolution devices must also be placed away from other components on a costly and dedicated flexible circuit, said Vishay. The 16-bit resolution of the VCNL4020X01 allows it to be assembled on the main PCB near other components, ensures excellent cross-talk immunity, and is particularly important given that windows above the sensor typically absorb 90 % of the infrared emission, added the company.
The ambient light photo-pin-diode built into the VCNL4020X01 offers sensitivity close to that of the human eye, with a 16-bit dynamic range for ambient light detection from 0.25 lux to 16 klux. The sensor offers 100 Hz and 120 Hz flicker noise rejection.
Key specs include a supply voltage range of 2.5 V to 3.6 V, I²C bus voltage range from 1.7 V to 5 V, and low standby current consumption of 1.5 µA. The RoHS-compliant, halogen-free sensor provides a Moisture Sensitivity Level (MSL) of 3 for 168 hours of shelf life, and it is compatible with lead (Pb)-free soldering.
Availability: Samples and production quantities are available now, with lead times of six to eight weeks for large orders.
Pricing: Starts at $1.10 per piece in quantities of 5,000 for U.S. delivery.