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According to foreign media reports, Vishay intertechnology (Wesch) Optical Electronics Group has launched a new proximity sensor, which can achieve a sensing distance of up to 30 cm. It is packaged in a package with infrared transmitter, photoelectric proximity detector, amplifier and ADC circuit. Vcnl3040 sensor also has programmable interrupt function, provides support for I? C (internal integrated circuit, a serial communication bus) communication interface, and realizes effective object detection and collision detection functions in various consumer goods and industrial applications. (photo source: Weishi official website) the device is very suitable for smart home, industry, office, toy products, etc. compared with the previous generation of sensors, the proximity detection distance of the device increased by 33%, and the cost is lower than similar solutions in the market. It can be used in printers, copiers and household appliances to activate the display when objects are detected, robots and toys to prevent collision, parking lot free parking space detection, toilet appliances proximity detection, etc. The programmable interrupt function of vcnl3040 allows designers to specify high and low thresholds, thus reducing continuous communication with microcontrollers. In addition, the proximity sensor can choose 12 bit and 16 bit outputs, and adopts intelligent cancellation technology to eliminate crosstalk. At the same time, intelligent persistence design ensures its accurate perception ability and faster response time. The peak wavelength of the emitter is 940 nm, and there is no "red tail" visible. The power supply voltage of the device is 2.5V to 3.6V (the voltage range of I? C bus is 1.8V to 3.3V), and it has excellent temperature compensation capability in the temperature range of - 40 ℃ and 85 ℃. In addition, the sensor adopts lead-free 8-pin QFN package, which conforms to RoHS, halogen-free and Vishay green standards. At present, the new vcnl3040 proximity sensor can provide samples and has achieved mass production. The lead time of bulk order is 8-12 weeks.