Vishay Semiconductors VCNL3040 Proximity Sensor

Vishay Semiconductors VCNL3040 Proximity Sensor integrates a high-power infrared emitting diode (IRED) and a proximity sensor (PS) into a tiny package. It incorporates photodiodes, amplifiers, and analog-to-digital conversion (ADC) circuits into a single chip by CMOS process. The module also features a programmable interrupt function for proximity sensing with individual high and low thresholds. The 12-/16-bit proximity sensing function uses an intelligent cancellation scheme, effectively eliminating cross-talk. The device also employs a smart persistence scheme for a fast response time. Through its standard I²C bus serial digital interface, the VCNL3040 allows easy access to the proximity signal. The programmable interrupt function offers wake-up functionality for the microcontroller when a proximity event occurs, which reduces processing overhead by eliminating the need for continuous polling.

Vishay Semiconductors VCNL3040 Proximity Sensor is packaged in a compact quad flat no-lead (QFN) package, ideal for the low-height
requirements of smartphone, digital camera, and tablet PC applications.

Features

Integrated modules: IRED, PS, and signal conditioning IC
Low-power I²C (SMBus compatible) interface
2.5V_DD to 3.6V_DD supply voltage
10kHz to 400kHz I²C bus frequency range f_(I2CCLK)
850nm peak sensitivity wavelength of PS (λpps)
Floor life: 168h, MSL3, according to J-STD-020
-40°C to +85°C operating temperature range
-40°C to +100°C storage temperature range
200mA IRED driving current
Selectable for 12-bit / 16-bit output data
Lead free, halogen free, and RoHS compliant

PS functions
- 0mm to 300mm PS detection range
- Immunity to red glow (940nm IRED)
- Programmable IRED sink current
- Intelligent cancellation to reduce cross-talk
- Smart persistence scheme to reduce PS response time
- Adjustable persistence to prevent false triggers for PS
- Programmable interrupt function for PS with upper and lower thresholds
QFN-8 package type
4mm x 2mm x 1.1mm dimensions