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AS7341

General Description

Datasheet

• PUBLIC

DS000504

• v3-00 • 2020-Jun-25

│ 3

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 ultra-

low profile package with dimensions of 3.1mm x 2mm x 1mm.

1.1

Key Benefits & Features

The benefits and features of AS7341, 11-Channel Multi-Spectral Digital Sensor, are listed below:

Figure 1: Added Value of Using AS7341

Benefits

Features

Precision color, spectral composition and

distribution measurments

8 optical channels distributed over the visible

spectral range + clear and NIR channels

realized via silicon nano-optic interference filter

deposition technologies

Low power consumption and efficient I²C

communication

● 1.8VDD operation, max 300µA

● Configurable sleep mode to <5µA

● Interrupt-driven device

Integrated ambient light flicker detection on

chip and light source detection through NIR

channel

● Dedicated channel

● Independently configurable timing and gain

● Automatic gain adjustment

● 50Hz and 60Hz flicker detection flags

Electronic shutter/trigger and synch control

GPIO can be used as external trigger input or

light source synchronization output

External photodiodes to expand detection range

GPIO can be used as input for external

photodiodes including mid-IR range

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