Electronicdesign 5304 Vishay1203 B2
Electronicdesign 5304 Vishay1203 B2
Electronicdesign 5304 Vishay1203 B2
Electronicdesign 5304 Vishay1203 B2
Electronicdesign 5304 Vishay1203 B2

Proximity Sensors Integrate Multiple Devices In Mini Package

Dec. 9, 2012
The VCNL3020 proximity sensor from Vishay Intertechnology combines an IR emitter, photo-pin-diode, signal-processing IC, and 16-bit analog-to-digital converter (ADC) in a 4.85- by 2.35- by 0.83-mm surface-mount package
The VCNL3020 proximity sensor from Vishay Intertechnology combines an IR emitter, photo-pin-diode, signal-processing IC, and 16-bit analog-to-digital converter (ADC) in a 4.85- by 2.35- by 0.83-mm surface-mount package. Support is included for an I2C bus communication interface. There’s also an interrupt function, which enables the sensor to work independently until there’s a programmable threshold; it then wakes up the microcontroller. Programmable LED current, which ranges from 10 to 200 mA (in 10-mA steps), allows for distances up to 200 mm, and more than a meter when the emitter driver is used to drive external emitters. Crosstalk immunity is enhanced thanks to 16-bit effective resolution for proximity detection, which eliminates the need for a mechanical barrier between the emitter and detector. Standby current measures 1.5 µA. The VCNL3020 saves power for touchscreen locking in a range of mobile devices, from smartphones and PDAs to digital cameras.

VISHAY INTERTECHNOLOGY INC.

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