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AS7225 Smart Lighting Director

Tunable White and Daylighting Smart Sensor/Director


  • Calibrated tristimulus XYZ CCT delivers closed loop CCT/daylighting directives to application microprocessor
  • I²C and serial UART interfaces with simple text or register-based commands to control and configure key light tuning supervisory functions
  • Calibrated-for life nano-optic silicon interference filters for XYZ, CCT, DUV and lux
  • Additional master I²C for add-on ambient light sensing
  • 20-pin LGA 4.5mm x 4.7mm x 2.5mm, -40°C to +85°C


  • Maximizes system flexibility and lowers overall manufactured costs while adding precision to tunable white luminaires and lamps
  • Easy integration with flexible interface options to support any standard application host microprocessor
  • Eliminates light-by-light factory calibration for most tunable white and daylighting luminaires
  • Built-in support for daylighting/daylight harvesting systems
  • Compact lighting-capable package with no added optics required

Product parameters

Sensor Type CIE tristimulus XYZ
Application Closed loop color/daylighting tuning
UART Yes, supports high level directive interface
Reference Networking Host µP
Smart Ltg Command Set UART commands or I²C register-based parameters
Lux/CCT Control Via I²C directives
I²C Slave
Package 20-pin LGA with aperture

General Description

Simplify tunable white lighting systems with the AS7225 sensor-integrated IoT smart sensor/director. The AS7225 will lower the manufactured cost of your tunable white lighting system, while allowing maximum IoT flexibility by working in conjunction with any standard application host microprocessor. CCT-calibrated tri-stimulus color sensing for direct CIE color point mapping translates CCT targets to warm/cool string directives. Adaptive algorithmic support enables a companion application host 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 serial UART or I²C bus. Sensor integration plus closed loop control enables lower precision system components to produce a higher-quality tunable white luminaire or replacement lamp.

This product suits for the following applications:

  • Intelligent, networked solid-state lighting systems for variable CCT and daylight harvesting
  • Integrated smart lighting control of variable CCT white lighting solutions
  • Luminaires intended to meet California Title 24 daylighting requirements
  • Commercial, retail, and residential white/color changing LED lighting systems
  • Networked lighting systems with IoT sensor expandability


Title Category Headline Buy
AS7225DemoKit Application Board Demo Kit for AS7225


Name Type Description Language
AS7225_AD000174_1-00.pdf Application Data Reference Design and Schematic Director Demo 1V2 English

Technical Documents

Name Type Description Version Language
AS7225_AN000458_3-00.pdf Application Note Evaluation User Interface Installation & Operation Guide 3-00 English
AS7225_AN000457_2-00.pdf Application Note FlashCatUSB Programming Instruction 2-00 English
AS7225_BD000203_1-00.png Block Diagram AS7225 Block Diagram 1-00 English
AS7225_DS000496_1-00.pdf Datasheet Document version 1-00 1-00 English
AS7225_FS000162_1-00.pdf Factsheet Tunable Lighting - Smart System Sensor - Light Director 1-00 English
SmartLighting_PD000460_1-00.pdf Other Product Document ams Smart Lighting Short Intro-Jun 2018 1-00 English
AS7225_PD000169_1-00.pdf Other Product Document Reference Design and Schematic Director Demo 1V2 1-00 English
AS7225_PD000366_1-00.png Other Product Document AS7225DemoKit Image 1-00 English
AS7225_UG000332_2-00.pdf User Guide Director Demo Kit User Guide 2-00 English

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