ams OSRAM AS7261 Spectral Sensing Engine

ams OSRAM AS7261 Spectral Sensing Engine integrates Gaussian interference filter technology to provide direct XYZ color coordinates consistent with the CIE 1931 2º standard observer color coordinates. The AS7261 also maps the XYZ coordinates to the x, y (Y) of the 2-dimensional color gamut and scales the coordinates to the CIE 1976 Δu'v' coordinate system. The device provides accurate Correlated Color Temperature (CCT) measurements and provides color point deviation from the black body curve for white light color in the Δu'v' coordinate system.

The AS7261 Sensor integrates a near-IR channel for other applications. LED drivers with programmable currents are provided for electronic shutter applications. The device integrates Gaussian filters into standard CMOS silicon via Nano-optic deposited interference filter technology and is packaged in an LGA package. This package provides a built-in aperture to control the light entering the sensor array. Control and spectral data access are implemented through either the I²C register set or with a high-level AT Spectral Command set via a serial UART. Typical applications include color measurement and absorbance, color matching and identification, and precision color tuning/calibration.

Control and spectral data access are implemented through either the I²C register set or a high-level AT Spectral Command set via a serial UART. Typical applications include color measurement and absorbance, color matching and identification, and precision color tuning/calibration.

The AS7261N provides direct XYZ sensor data, which conforms to the human eye's tri-stimulus standard observer color response. A near-IR channel enables additional application flexibility.

The ams OSRAM AS7261 Spectral Sensing Engine is housed in a compact 4.5mm x 4.7mm x 2.5mm LGA-20 package.

Features

Calibrated chromatic white data
- XYZ
- xy data (CIE 1931)
- DUV, u'v', uv (CIE 1976)
- CCT, LUX
Simple text-based command interface via UART or direct register read and write with interrupt on sensor ready option on I²C
- UART or I²C slave digital interface
Lifetime-calibrated sensing with minimal drift over time or temperature
- Filter set realized by silicon interference filters

No additional signal conditioning required
- 16-bit ADC with digital access
Electronic shutter control/synchronization
- Programmable LED drivers
Low voltage operation
- 2.7V to 3.6V with I²C interface
Small, robust package with a built-in aperture
- 4.5mm x 4.7mm x 2.5mm LGA-20 package
- -40ºC to +85ºC temperature range