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AS7225 Smart Lighting Director

Tunable White and Daylighting Smart Sensor/Director


  • Smart XYZ tristimulus chromatic sensing delivering closed loop CCT/daylighting directives
  • Readable registers for CIE 1931 and 1975 color point coordinates, CCT, DUV and lux
  • Simple register-based commands to control and configure key light tuning supervisory functions
  • Calibrated nano-optic silicon interference filters
  • 20-pin LGA 4.5mm x 4.7mm x 2.5mm, 0°C to +85°C


  • Rapid integration of variable CCT and spectrally tunable lighting
  • Built-in support for daylighting
  • Automatic spectral and lumen maintenance over temperature and time
  • Lifetime calibrated sensing
  • Compact package with no added optics required

Product parameters

Sensor Type CIE tristimulus XYZ
Application Closed loop color/daylighting tuning
Reference Networking Host µP
Smart Ltg Command Set Register-based
Lux/CCT Control Via I²C directives
I²C Slave
Package 20-pin LGA with aperture

General Description

The AS7225 tunable white and daylighting smart sensor/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 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 I²C bus.

This product suits for the following applications:

  • Tunable-white lighting luminaires/systems
  • Integrated daylighting luminaires/systems
  • Retrofit tunable-white or daylighting control add-ons
  • IoT smart lighting


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_BD000203_1-00.png Block Diagram AS7225 Block Diagram 1-00 English
AS7225_PD000366_1-00.png Other Product Document AS7225DemoKit Image 1-00 English
AS7225_AN000458_2-00.pdf Application Note Evaluation User Interface Installation & Operation Guide 2-00 English
AS7225 Demo Kit_UG000332_1-00.pdf User Guide Director Demo Kit User Guide 1-00 English
AS7225 Demo Kit_AN000457_1-00.pdf Application Note FlashCatUSB Programming Instruction 1-00 English
AS7225_PD000169_1-00.pdf Other Product Document Reference Design and Schematic Director Demo 1V2 1-00 English
AS7225_FS000162_1-00.pdf Factsheet Tunable Lighting - Smart System Sensor - Light Director 1-00 English
AS7225_DS000496_1-00.pdf Datasheet Document version 1-00 1-00 English

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