AS7225 Calibrated XYZ Chromatic Smart Lighting Director The AS7225 Smart Lighting Director incorporates an embedded General Description digital tri-stimulus chromatic calibrated for life nano-optic sensor providing direct CIE1931 XYZ and CIE 1976 uv coordinate mapping. Adaptive algorithmic support enables a companion 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 IC bus. An additional on-chip IC master provides native support for select ams sensors, such as the TSL4531 for combining 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. Key Benefits & Features The benefits and features of this device are listed below: Figure 1: Added Value of Using AS7225 Benefits Features Provides accurate external host MCU Integrated intelligence with XYZ tri-stimulus color supervision of variable CCT and spectrally sensing for direct translation to CIE 1931 standard tunable lighting observer color map Automatically directs external warm and cool white Uses accurate XYZ sensed data to provide a host PWM controlled LED strings for chromatic LED MCU, with its own PWMs, simple to use luminaire tuning. Also directs dimming (combined directives for closed loop tuned LED lighting with PWM color tuning) Supports autonomous color point and lumen output Automatic spectral and lumen maintenance adjustment resulting in automatic spectral and over temperature and time lumen maintenance ams Datasheet Page 1 v1-00 2016-Dec-29 Document FeedbackAS722 5 Gene ral Des c rip t ion Benefits Features Provides direct register based access to closed IC slave digital Interface loop tuning directives Used to interface other ams sensors with native support by the AS7225 (e.g. TSL4531 for adding IC master digital interface Daylighting operation) Simple register-based commands to control and Rapid luminaire integration configure key light-tuning supervisory and IoT sensor expansion functions Readable registers for CIE 1931 and 1975 color-point Complete data on lighting environment coordinates, CCT, duv and lux Calibrated sensing with minimal drift over time Chromatic white color realized by silicon interference or temperature filters 20-pin LGA package 4.5mm x 4.7mm x 2.5mm, Small package, with build in aperture -40C to 85C Applications Variable CCT chromatic tuning luminaires and systems Daylighting-responsive luminaires and systems Commercial, retail, and residential white tunable/Kelvin-changing LED lighting systems Networked smart lighting systems Page 2 ams Datasheet Document Feedback v1-00 2016-Dec-29