ams AG - global leader in the design and manufacture of high performance analog ICs (integrated circuits)

AS7225 Smart Lighting Director

Tunable White and Daylighting Smart Sensor/Director


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.

Key Features

  • Smart XYZ tri-stimulus 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 4.5 x 4.7 x 2.5mm, 0°C to +85°C

Key Benefits

  • 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 Facts

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

Additional Information

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