General Description
The ams AS7341 is an 11-channel spectrometer enabling new consumer, commercial and laboratory
applications including spectral identification, reflection and absorption for color matching, fluid or
reagent analysis, passive ambient light measurement and color calibration. The spectral response is
defined by individual channels covering approximately 350nm to 1000nm with 8 channels centered in
the visible spectrum (VIS), plus one near-infrared (NIR) and a clear channel. The NIR channel in
combination with the other VIS channels may provide information of surrounding ambient light
conditions, including light source detection. Light source detection can be assisted by an integrated
flicker channel that can automatically flag ambient light flicker at 50/60Hz as well as buffer data for
externally calculating other flicker frequencies up to 2kHz.
AS7341 integrates high-precision optical filters onto standard CMOS silicon via nano-optic deposited
interference filter technology. A built-in aperture controls the light entering the sensor array to increase
accuracy. A programmable digital GPIO and LED current controller enable light source and trigger
control, as well as enabling expandability for an added external photodiode. Device control and
spectral data access is implemented through a serial I²C interface. The device is available in an ultralow
profile package with dimensions of 3.1mm x 2mm x 1mm.
Applications
High-precision reflective color point and spectral measurements
Fluid color, turbidity or reagent based constituent analysis
Spectral power distribution and passive ambient CCT measurement for home and building
automation
High-end display color management