เซ็นเซอร์วัดแสง GY-AS7341 11 CH ผ่าน I2C วัดได้แบบ Multispectral

AS7341 11-channel spectral sensor

ams' 11-channel spectrometer for spectral identification and color matching applications

Features

• 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

The ams  AS7341 is an 11-channel spectrometer for spectral identification and color matching applications in mobile devices. The spectral response is defined over a wavelength range of approximately 350nm to 1000nm. Six channels can be processed in parallel by independent ADCs, while the other channels are accessed via a multiplexer. Eight optical channels cover the visible spectrum, one channel can be used to measure near-infrared light, and one channel is a photodiode without a filter ("transparent").

The device also integrates dedicated channels to detect ambient light flicker at 50 Hz or 60 Hz. The flicker detection engine can also be used to buffer data while other flicker frequencies are calculated externally. The NIR channel combined with other VIS channels can provide information about the surrounding ambient light conditions (light source detection). The device can also be synchronized with external signals via pin GPIO. The AS7341 integrates filters into standard CMOS silicon using nano-optical deposition interference filter technology, and its package provides a built-in aperture to control the light entering the sensor array. Control and spectral data access is achieved through a serial I 2 C interface. The device is available in an ultra-thin package with dimensions of 3.1 mm x 2 mm x 1 mm.

• 11-channel optical sensing front end (350 nm to 1000 nm), FOV: ±35°
• 8 channels visible plus 3 special channels
  • Transparent channel
  • On-chip ambient light flicker detection (up to 1.5 kHz)
  • Infrared channel
• Response range: 500 to 3500 counts/μW/cm²
• Integration time: T11 ch (typical value) = 2 * tint = 2 * 50 m = 100 ms 
• 400 kHz I2C interface
•  GPIO:
  • External InGaAs/Si photodiode
  • External trigger to start spectrum measurement

• Power consumption (typical): 210μA active, 0.7μA sleep
• Supply voltage: 1.8 V
• Small system size, 3.1 mm x 2 mm x 1 mm (OLGA 8 package)

• Light source detection and spectral reconstruction of ambient light
• Flicker-free camera operation and image optimization [AWB (Auto White Balance)]
• Post-processing optimization of camera images (CRI measurement)
• Color matching and skin tone measurement
  • Enhanced AI: Search and shop by color (e-commerce upgrade)

• Display management, printer