Meet your needs for ambient light, proximity sensing and UV light monitoring functions at the same time!

Silicon Labs ' Si1153 and Si1133 optical sensor series can sense ultraviolet ( UV ) light index, ambient light ( ALS ), and long-distance proximity ( Proximity ), and are very suitable for designing a variety of optical monitoring applications. Since optical sensors also require an external microcontroller ( MCU ) to read sensor information and provide sufficient performance to run back-end processing algorithms to achieve various optical monitoring functions, Silicon Labs also provides a new optical sensor EXP development board, combined with the EFM8 Busy Bee 3 series MCU entry development kit, to help engineers accelerate the development of terminal equipment that supports ambient light, proximity sensing, and UV light monitoring functions. Please click "Read the original article" to learn more about Silicon Labs ' optical sensor plus 8 -bit MCU ambient light monitoring solution .

Silicon Labs' Si1153 is an ambient light sensor and proximity and gesture detector with an I2C digital interface and programmable event interrupt output. This sensor IC includes an analog-to-digital converter, integrated high-sensitivity visible and infrared photodiodes, a digital signal processor, and three integrated LED drivers with programmable excitation power. The Si1153 provides excellent performance over a wide dynamic range and under a variety of light sources including direct sunlight, and can also operate under dark glass covers. The photodiode response and associated digital conversion circuitry have excellent immunity to artificial light flicker noise and natural light flutter noise, and it has two or more LEDs to support multi-axis proximity motion detection.

Si1133 is a UV index sensor and ambient light sensor with I2C digital interface and programmable event interrupt output. This sensor IC includes dual 23-bit analog-to-digital converters, integrated high-sensitivity UV, visible and infrared photodiodes, and digital signal processors. Si1133 is provided in a 10-lead 2x2mmQFN package and can operate at 1.62 to 3.6V in the temperature range of –40 to +85°C.

Development boards based on Silicon Labs' Si1153 and Si1133 optical sensors, along with the EFM8 BusyBee 3 development kit, enable users to easily evaluate all of the basic optical sensor types Silicon Labs offers, including: basic proximity and ambient light sensing, gestures, UV (ultraviolet) light sensing, long-range proximity and optimized daylight proximity.

• Fully supports proximity sensing, ambient light and UV light monitoring data collection;

• Can actually demonstrate and present various optical monitoring data and application functions;

• Paired with the EFM8 BB3 MCU to read all optical monitoring data and run backend processing algorithms.

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Proximity Proximity Induction

Silicon Labs optical sensors can drive an internal or external LED and measure the reflected light data. When approaching the sensor, more light is reflected and the amount of data increases. General proximity sensing can achieve a distance of 1 cm to 50 cm without an external lens, while long-distance proximity sensing can achieve a distance of 1 cm to 200 cm through a lens. At the same time, this optical sensor supports outdoor applications in sunny environments.

Ambient light monitoring

The application of ambient light monitoring does not drive the LED and measure the ambient light through an optical sensor, but transmits the optical sensor data to an external MCU and further calculates the LUX value of the ambient light by running the back-end processing algorithm. In the case of a high LUX value, the system can judge that the current ambient light is brighter. When the sensor is covered by an object, the LUX value will decrease.

UV light detection

For UV light detection, the backend processing algorithm is also run through an external MCU to calculate the UV index of the environment. The typical UV index value is 0 (low-risk environment) to 12 (high-risk environment). If you need to improve the detection performance, you must use an external Diffuser.

For more information about Silicon Labs' highly integrated, low-power 8-bit MCU products and complete optical sensor lineup, please visit the official website:

http://cn.silabs.com/products/sensors/infraredsensors/Pages/default.aspx

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