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VCNL3020 Datasheet(PDF) 4 Page - Vishay Siliconix |
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VCNL3020 Datasheet(HTML) 4 Page - Vishay Siliconix |
4 / 13 page VCNL3020 www.vishay.com Vishay Semiconductors Rev. 1.0, 25-Jun-12 4 Document Number: 84150 For technical questions, contact: sensorstechsupport@vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 Fig. 7 - Relative Spectral Sensitivity vs. Wavelength (Proximity Sensor) Fig. 8 - Relative Radiant Sensitivity vs. Angular Displacement (Proximity Sensor) APPLICATION INFORMATION VCNL3020 is a cost effective solution of proximity sensor with I2C bus interface. The standard serial digital interface is easy to access “Proximity Signal” without complex calculation and programming by external controller. Beside the digital output also a flexible programmable interrupt pin is available. 1. Application Circuit Fig. 9 - Application Circuit (x) = Pin Number Note • The interrupt pin is an open drain output. The needed pull-up resistor may be connected to the same supply voltage as the application controller and the pull-up resistors at SDA/SCL. Proposed value R2 should be >1 k Ω , e.g. 10 kΩ to 100 kΩ. Proposed value for R3 and R4, e.g. 2.2 k Ω to 4.7 kΩ, depend also on the I2C bus speed. For detailed description about set-up and use of the interrupt as well as more application related information see AN: “Designing VCNL3020 into an Application”. 1.1 0 0.2 0.4 0.6 0.8 0.9 1.0 0.1 0.3 0.5 0.7 1100 400 500 600 700 800 900 1000 λ - Wavelength (nm) 22307 0° 20° 40° 60° 80° 0.6 0.7 0.8 0.9 1.0 0 0.1 0.2 0.3 0.4 0.5 22308 22312-4 Host Micro Controller I 2C Bus Clock SCL I 2C Bus Data SDA VCNL3020 INT (3) SCL (4) SDA (2) GND (8, 9) V DD (5) IR_Anode (1) C1 C2 C3 C4 R1 100 nF 100 nF 10 μF 22 μF 10R GPIO 2.5 V to 3.6 V 2.5 V to 5.0 V 1.7 V to 5.0 V R2 R3 R4 |
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