Ambient Light Sensors

Ambient Light Sensors can be used whenever a high resolution light sensor with a two-wire digital interface is required. Applications include street light control, security lighting, sunlight harvesting, machine vision, automotive instrumentation clusters and for light level sensing on notebooks, tablets, flat-panel televisions, cell phones, and digital cameras.

ams Ambient Light Sensors, also called Light-to-Digital Converters, combine a broadband photodiode (350 nm to 1100 nm) with a visible light blocking photodiode in a single CMOS integrated circuit. With integrated analog-to-digital conversion circuitry, data is output via a serial interface using two standard protocols: SMBus and I2C. Light intensity in Lux (i.e. illuminance) can be easily calculated using the output from both photodiodes without the need of using an expensive optical filter.

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