MIKROE-2801

MIKROE-2801 Datasheet

PID MIKROE-2801 Weight 22 g Proximity and light sensing

Part	Datasheet
MIKROE-2801	MIKROE-2801 (pdf)

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Proximity 3 click PID MIKROE-2801 Weight 22 g Proximity and light sensing Proximity 3 click is an intelligent proximity and light sensing device, which features the VCNL4200 sensor from Vishay - high sensitivity long distance proximity sensor PS , ambient light sensor ALS and 940 nm IRED, all in one small package. With its smart sensing and light conditioning properties, the Proximity 3 click can be used in a wide range of applications adjusting the brightness of the TFT screen depending on ambient light, turning off the TFT background light if it is covered, very accurate lux meters, reliable security sensors and so on. How the Proximity 3 click works Proximity 3 click uses the VCNL4200 sensor, which combines matched 940 nm IR emitter and a photodiode for proximity measurement and ambient light sensing. VCNL4200 offers programmable measurement by utilizing the advanced signal processing techniques, allowing the sensor to operate in various conditions. Communication with the microcontroller is done via the I2C interface so that the host controller can set the measurement parameters and request results back from the sensor. Both low and high threshold values for the measured property can also be set via the I2C so that the interrupts can be generated every time the threshold value is exceeded. This allows for the reduced need of the sensor polling, which can result in better power management. With MikroElektronika library functions, setting up the registers is really easy and the tedious task of initializing the sensor is taken care of with a few simple function calls. More information about the sensor's registers and addresses can be found in the VCNL4200 datasheet. The Filtron technology used in the ALS, allows the sensor to match the ambient light spectral sensitivity to human eye response and it's immune to fluorescent light flicker. This ensures the accuracy of the measurements. The maximum detection range is selectable 197 / 393 / 786 / 1573 lux with highest sensitivity lux / step. The proximity sensor uses advanced ambient and background light cancellation schemes, so it is fairly immune to interferences that might occur in this case. This allows for a quite precise proximity detection. The sensor can work either in 12-bit or 16-bit mode, selectable by I2C command. The click's range is up to 1.5m. VCNL4200 input voltage is 3V3, while the separate 5V supply rail is used to supply power for the IR emitter pulses, generated by the small external P-channel MOSFET Q1 . This way, the power dissipation of the IRED drive is displaced from the chip, and the high-current IRED drive pulses are isolated from the sensitive integrated circuit sections, connected to the 3V3 rail. Specifications Type Proximity Adjusting the brightness of the TFT screen depending on ambient light, turning off the TFT background light if it is covered, very accurate lux meters, reliable security sensors, etc. modules VCNL4200 sensor high sensitivity long distance proximity sensor PS , ambient light sensor ALS and 940 nm IRED, intelligent background light cancellation Key Features Proximity distance up to m, immunity to the red glow 940 nm IRED and fluorescent light flickering, selectable maximum detection range 197 / 393 / 786 / 1573 lux with highest sensitivity lux/step Interface Input Voltage 3.3V,5V Click board size S x mm Pinout diagram This table shows how the pinout on Proximity 3 click corresponds to the pinout on the mikroBUS socket the latter shown in the two middle columns . Notes Pin Notes NC 1 AN PWM 16 NC 2 RST NC 3 CS NC 4 SCK NC 5 MISO SCL NC 6 MOSI SDA Interrupt output I2C clock I2C data Power supply +3.3V 7 3.3V Power supply Ground GND 8 GND Ground Proximity 3 click maximum ratings Min Typ Max Unit

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Proximity 3 click

PID MIKROE-2801 Weight 22 g Proximity and light sensing

Proximity 3 click is an intelligent proximity and light sensing device, which features the VCNL4200 sensor from Vishay - high sensitivity long distance proximity sensor PS , ambient light sensor ALS and 940 nm IRED, all in one small package. With its smart sensing and light conditioning properties, the Proximity 3 click can be used in a wide range of applications adjusting the brightness of the TFT screen depending on ambient light, turning off the TFT background light if it is covered, very accurate lux meters, reliable security sensors and so on.

How the Proximity 3 click works

Proximity 3 click uses the VCNL4200 sensor, which combines matched 940 nm IR emitter and a photodiode for proximity measurement and ambient light sensing. VCNL4200 offers programmable measurement by utilizing the advanced signal processing techniques, allowing the sensor to operate in various conditions. Communication with the microcontroller is done via the I2C interface so that the host controller can set the measurement parameters and request results back from the sensor.

Both low and high threshold values for the measured property can also be set via the I2C so that the interrupts can be generated every time the threshold value is exceeded. This allows for the reduced need of the sensor polling, which can result in better power management. With MikroElektronika library functions, setting up the registers is really easy and the tedious task of initializing the sensor is taken care of with a few simple function calls. More information about the sensor's registers and addresses can be found in the VCNL4200 datasheet.

The Filtron technology used in the ALS, allows the sensor to match the ambient light spectral sensitivity to human eye response and it's immune to fluorescent light flicker. This ensures the accuracy of the measurements. The maximum detection range is selectable 197 / 393 / 786 / 1573 lux with highest sensitivity lux / step.

The proximity sensor uses advanced ambient and background light cancellation schemes, so it is fairly immune to interferences that might occur in this case. This allows for a quite precise proximity detection. The sensor can work either in 12-bit or 16-bit mode, selectable by I2C command. The click's range is up to 1.5m.

VCNL4200 input voltage is 3V3, while the separate 5V supply rail is used to supply power for the IR emitter pulses, generated by the small external P-channel MOSFET Q1 . This way, the power dissipation of the IRED drive is displaced from the chip, and the high-current IRED drive pulses are isolated from the sensitive integrated circuit sections, connected to the 3V3 rail.

Specifications

Type

Proximity

Adjusting the brightness of the TFT screen depending on ambient light, turning off the TFT background light if it is covered, very accurate lux meters, reliable security sensors, etc.
modules

VCNL4200 sensor high sensitivity long distance proximity sensor PS , ambient light sensor ALS and 940 nm IRED, intelligent background light cancellation

Key Features

Proximity distance up to m, immunity to the red glow 940 nm IRED and fluorescent light flickering, selectable maximum detection range 197 / 393 / 786 / 1573 lux with highest sensitivity lux/step

Interface

Input Voltage 3.3V,5V

Click board size

S x mm

Pinout diagram

This table shows how the pinout on Proximity 3 click corresponds to the pinout on the mikroBUS socket the latter shown in the two middle columns .

Notes Pin

Notes

NC 1 AN PWM 16

NC 2 RST

NC 3 CS

NC 4 SCK

NC 5 MISO SCL

NC 6 MOSI SDA

Interrupt output

I2C clock

I2C data

Power supply +3.3V 7 3.3V

Power supply

Ground GND 8 GND

Ground

Proximity 3 click maximum ratings

Min Typ

Max Unit

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Datasheet ID: MIKROE-2801 649437