AS7261N - Spectral Sensor
Tri-Stimulus XYZ + NIR Sensor with Electronic Shutter
Features
- Tri-stimulus XYZ+NIR realized by silicon interference filters
- Integrated programmable LED drivers
- I²C slave digital interface with optional interrupt operation
- 16-bit ADC with digital access
- 20-pin LGA package 4.5mm x 4.7mm x 2.5mm, with built-in aperture
Benefits
- Stable filter conditions over temperature and life time
- Compact true-color sensing, XYZ coordinates direct from the sensor
- Direct register read and write with interrupt on sensor ready
- Signal conditioning on chip
- Sample illumination without external LED driver
Product parameters
| Sensor Type | XYZ tri-stimulus/standard observer |
|---|---|
| Applications | Color analysis and color calibration |
| I/O | I²C slave digital Interface |
| 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 |
General description
The AS7261N provides direct XYZ sensor data which conforms to the tri-stimulus standard observer color response of the human eye. A near-IR channel and LED drivers with programmable currents increase application flexibility, including support for electronic shutter applications.The AS7261N integrates Gaussian filters into standard CMOS silicon via nano-optic deposited interference filter technology and is packaged in an LGA package that provides a built in aperture to control the light entering the sensor array.
Control and spectral data access is implemented through an I²C register set.
Not Recommended for New Designs
ams-OSRAM AG does not recommend using this product for new designs. Please see AS7261 for possible replacement or contact your local sales representative for further information.
This product suits for the following applications:
- Color measurement and absorbance
- Color matching and identification
- Precision color tuning/calibration
Tools
| Title | Category | Headline | Buy |
|---|---|---|---|
| AS726xDemoKit | Application Board | Demo Kit for AS726x |
Technical documents
| Type | Description | Language | ||
|---|---|---|---|---|
| Datasheet | Document version 1-02 | English | ||
| Application Note | AS726xN Design Considerations | English |
Notifications
| Type | Description | Language | ||
|---|---|---|---|---|
| Product Change Notification | CN25-2019 (Customer Information AS72xx) | English |
Other information
| Type | Description | Language | ||
|---|---|---|---|---|
| Block Diagram | AS7261N Block Diagram | English |
Related boards
Demo Kit for AS726x
AS726xDemoKit
The AS726x Demo Kit is a Windows PC-hosted evaluation environment, designed to provide the user an quick-start approach to spectral sensing. The demo kit consists of the Intelligent Spectral Interface (iSPI) board, USB/FTDI cable, and a USB stick which includes drivers, documentation and graphical user interface. The iSPI board is jumper selectable for either I2C or UART interface access via the USB/FTDI cable connection. The I2C interface presents a traditional register based device interface, while the UART interface allows high-level command access to the AS726x device features. The iSPI board includes unpopulated device pads for the installation of standard LED light sources suited to the specific spectral needs of the application. By default, the LED pads are unpopulated.
Related products
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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.
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.
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