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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
Applications 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

Not recommended for new designs. See AS7221 superset product.
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


Type Description Language
Evaluation Software AS72xx Firmware Update using GUI EN
App Configuration Tool for AS72xx EN

Technical documents

Type Description Language
Datasheet AS7225 Calibrated XYZ Chromatic Smart Lighting Director English
Application Note FlashCatUSB Programming Instruction English
Application Note Evaluation User Interface Installation & Operation Guide English
Application Note AS72xx External Flash program and update 10V1 English
Application Note AS72xx How to Flash AS72xx Firmware using English
Application Note True Color Luminaire Design Bluetooth Connected English
Application Note AS72xx How to Program AS72xx Firmware with FlashCatUSB 1V24 English
User Guide Director Demo Kit User Guide English
Other Product Document ams Smart Lighting Short Intro-Jun 2018 English


Type Description Language
Product Change Notification CN25-2019 (Customer Information AS72xx) English

Other information

Type Description Language
Block Diagram AS7225 Block Diagram English
Factsheet Tunable Lighting - Smart System Sensor - Light Director English
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