Vishay Intertechnology, Inc. has introduced a fully integrated proximity and ambient light optical sensor featuring a power-saving interrupt function. The VCNL4010 combines an infrared emitter and photo-pin-diode for proximity, ambient light detector, signal processing IC, and a 16-bit ADC in one small 3.95 mm x 3.95 mm x 0.75 mm leadless (LLP), surface-mount package.
Vishay says that the device’s easy-to-use I2C bus communication interface greatly simplifies window and sensor design in a wide variety of consumer and industrial applications. According to Vishay the VCNL4010’s interrupt function enables the sensor to work independently until a predefined proximity or ambient light event occurs. Then it wakes up the microcontroller. This eliminates polling communication traffic between the sensor and microcontroller.
For mobile devices such as smartphones, touch phones, PDAs, GPS units, and digital cameras, in addition to computing and industrial devices and displays, the new VCNL4010 saves power as a proximity sensor for touchscreen locking, and serves as an integrated ambient light function for display/keypad contrast control and dimming. Vishay says it contains all the circuitry needed for these applications in one device, and it eliminates the need for mechanical light barriers and optical alignment of the IR emitter and photo diode.