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AS7341 – 11-Channel Spectral Color Sensor

11-channel spectrometer for spectral identification and color matching applications


  • 8 optical channels distributed over the visible range
  • 3 extra channels: Clear, Flicker and NIR channel
  • 6 parallel ADCs for signal processing
  • Ultra-low-profile package 3.1mm x 2mm x 1mm


  • Spectral information enables highly accurate object color measurements
  • Addtional spectral detection and characterization
  • Optimized channel count and signal processing for fast measurements
  • Highly compact, cost-effective packaging

Product parameters

Sensor Type Multi Spectral Sensor
Applications Spectral detection and analysis, building automation ambient sensing, color measurement
Package OLGA-8
Size [mm] 3.1 x 2 x 1
Supply Voltage [V] 1.8
Temperature Range [°C] -30 to 70

General description

AS7341 is an 11-channel multi-spectral sensor for color detection and spectral analysis applications. The spectral response is defined in the wavelengths from approximately 350nm to 1000nm. 6 channels can be processed in parallel by independent ADCs while the other channels are accessible via a multiplexer. 8 optical channels cover the visible spectrum, one channel can be used to measure near infra-red light and one channel is a photo diode without filter (“clear”). The device also integrates a dedicated channel to detect 50Hz or 60Hz ambient light flicker. The flicker detection engine can also buffer data for calculating other flicker frequencies externally. The NIR channel in combination with the other VIS channel may provide information of surrounding ambient light conditions (light source detection). The device can also be synchronized to external signals via pin GPIO.
AS7341 integrates filters into standard CMOS silicon via Nano-optic deposited interference filtertechnology and its package provides a built in aperture to control the light entering the sensor array.
Control and Spectral data access is implemented through a serial I²C interface. The device is available in an ultra-low profile package with dimensions of 3.1mm x 2mm x 1mm.

This product suits for the following applications:

  • Color matching and skin tone measurement
  • Enhanced Artificial Intelligence: Search and shop by color (eCommerce boost)
  • Laboratory color or reagent analysis
  • Home or office ambient spectral sensing
  • Spectral presence detection


Title Category Headline Buy
AS7341 - 11-channel spectral sensor Eval Kit Application Board AS7341 - Spectral Sensor Eval Kit Emissive/Ambient
AS7341 - Spectral Sensor Eval Kit Reflection Mode Application Board AS7341 - Spectral Sensor Eval Kit Reflection Mode


Type Description Language
Application Data AS7341 - from ADC to LUX and CCT English
Evaluation Software Evaluation Software for AS7341 EVK Reflection Mode - Color + Spectral Measurement EN
Evaluation Software Presence Demo Software in Combination with AS7341 Sensor Board and Unicom Interface EN
Evaluation Software Fast Demo Software (Flicker Measurement and Spectral Reflection) in Combination with AS7341 Sensor Board and Unicom Interface EN
Evaluation Software Evaluation Software for AS7341 EVK Aqua Sensor - Demo with technical Documents on Stick EN
Evaluation Software Evaluation Software for AS7341 ALS EVK - contactless measurements of ambient lighting or light sources EN

Technical documents

Type Description Language
Datasheet AS7341 11-channel multi-spectral digital sensor English
Application Note Calibration Methods AS7341 EVKs English
Application Note AS7341 Details for Optomechanical Design English
Application Note AS7341 Measure Turbidity with Spectral Sensors English
Quick Start Guide Measurement in Liquids English
Quick Start Guide AS7341 Discrete Demo Kit English

Environmental documents

Type Description Language
RoHS Certificate RoHS Certificate AS7341 English

Other information

Type Description Language
Block Diagram AS7341 Block Diagram English
Factsheet AS7341 Auto White Balance English
Factsheet AS7341 Color Matching English
Factsheet AS7341 Color Pen Demo English
Image AS734x perspective English
Image AS7341 Top perspective English
Image AS7341 size Comparison English
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