PROXIMITY AND AMBIENT LIGHT SENSOR

摘要

The VCNL4020X01 from Vishay Semiconductors is a proximity and ambient light optical sensor with an operating temperature range to 105℃. The product 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 4.8 × 2.3 × 0.8 mm rectangular leadless package.The unit saves power 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 rear-view mirror dimming. The device eliminates the need for additional light barriers and optical alignment of the IR emitter and photo diode.The product can function at any depth or air gap below the glass window and can be assembled on the main PCB near other components.