AS7225 Datasheet | ams

Description The AS7225 Smart Lighting Director incorporates an embedded digital tri-stimulus chromatic ‘calibrated for life’ nano-optic sensor providing direct CIE1931 XYZ and CIE 1976 u’v’ coordinate mapping. Adaptive algorithmic support enables a panion microprocessor to implement closed-loop, autonomous adjustment of variable CCT and daylight responsive LED lamps and luminaires. The AS7225 arrives pre-calibrated, and is designed for rapid integration into white-tunable and daylight responsive luminaire designs, delivering directives to the local microprocessor via an industry-standard I²C bus. An additional on-chip I²C master provides native support for select ams sensors, such as the TSL4531 for bining in-looking CCT tunable director functions with outward-looking ambient light sensing and daylighting control. The AS7225 integrates standard-observer filters onto the silicon via nano-optic deposited interference filters which deliver high-stability over time and temperature. The LGA package includes a built in aperture to control light entering the sensor array. Integrated intelligence enables lifetime CCT calibration to within 2-4 Macadam steps. Ordering Information and Content Guide appear at end of datasheet. Figure 1: Added Value of Using AS7225 Key Benefits & Features The benefits and features of this device are listed below: Benefits Features - Provides accurate external host MCU supervision of variable CCT and spectrally tunable lighting - Integrated intelligence with XYZ tri-stimulus color sensing for direct translation to CIE 1931 standard observer color map - Uses accurate XYZ sensed data to provide a host MCU, with its own PWMs, simple to use directives for closed loop tuned LED lighting - Automatically directs external warm and cool white PWM controlled LED strings for chromatic LED luminaire tuning. Also directs dimming (bined with PWM color tuning) - Automatic spectral and lumen maintenance over temperature and time - Supports autonomous...