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

AS7261 Spectral Sensing Engine

6-Channel XYZ Spectral_ID Device with Electronic Shutter and Smart Interface


The AS7261 integrates Gaussian interference filter technology to enable chromatic white color sensor which provides direct XYZ color coordinates consistent with the CIE 1931 2° Standard Observer color coordinates. Additional mapping of XYZ coordinates to the x, y (Y) of the 2-dimensional color gamut and scales of the CIE 1976 u’v’ coordinate system, providing accurate Correlated Color Temperature (CCT) measurements and color point deviation from the black body curve for white light color in the ∆u’v’ coordinate system. A Near-IR channel and LED drivers with programmable currents increase application flexibility, including support for electronic shutter applications.

Control and spectral data access is implemented either through either the I²C virtual register set, or via the serial UART enabling use of the high level Smart Spectral Command Set.

Key Features

  • Tri-stimulus XYZ realized by silicon interference filters
  • UART or I²C slave digital Interface
  • 16-bit ADC with digital access
  • Programmable LED drivers
  • 20-pin LGA package 4.5mm x 4.7mm x 2.5mm, with built-in aperture

Key Benefits

  • Compact true-color sensing
  • Simple text-based command interface via UART, or direct register read and write with interrupt-on-ready option on I²C
  • Lifetime-calibrated sensing with no drift over time or temperature


Product Facts

Sensor Type XYZ Tri-Stimulus/Standard Observer
Application(s) Authentication, Content Analysis
I/O I²C Master or UART (mode configurable)
Package 20-pin LGA with aperture
Size [mm] 4.5 x 4.7 x 2.5
Supply Voltage [V] 2.7 to 3.6
Temperature Range [°C] -40 to +85

Additional Information

  • Color/CCT sensing
  • Fluid or reagent analysis
  • Color point comparison
  • Display calibration
  • Authentication