SB040132025 – MULTISPECTRAL COLOR SENSOR SCHEMATIC BLOCK

This schematic block features the AS7265x multispectral sensor chipset, made up of three separately packaged chips — AS72651 (master), AS72652, and AS72653 — that together provide 18-band spectral sensing across visible and near‑infrared wavelengths. Designed for sophisticated color analysis, spectral identification, and quality‑control applications, this sensor set delivers factory-calibrated spectral data via digital interfaces.

The master sensor (AS72651) communicates over I²C or UART, orchestrating the two slave devices (AS72652 and AS72653) in a master/slave configuration. All three sensors have integrated Gaussian optical filters (20 nm full-width at half max) that span discrete wavelengths from 410 nm to 940 nm, enabling precise multi-spectral sampling. Each device also includes two programmable LED drivers, which can be used to illuminate samples under test or enhance measurement accuracy.

Key Features:

• 18 spectral channels via combined AS72651, AS72652, and AS72653
• Filtered spectral bands from roughly 410 nm to 940 nm, each ~20 nm wide
• Digital interface: I²C or UART (selectable)
• Integrated electronic shutter for synchronized sampling
• Two programmable LED drivers per sensor for active illumination
• Factory calibration for consistent sensitivity; stable over temperature and lifetime
• Supply voltage: ~2.7 V to ~3.6 V
• Operating temperature: –40 °C to +85 °C
• Compact 20-pin LGA packages

Typical Applications:

• Portable and lab-grade spectrometers
• Color sorting and quality-control in manufacturing
• Horticulture / plant health monitoring via spectral signatures
• Anti-counterfeiting and material authentication
• Fluid analysis (e.g. water purity, chemical concentration)
• Wearable or handheld spectral analysis tools

By integrating this Quickboards schematic block, engineers can prototype production-ready spectral sensing systems, reduce calibration overhead, and obtain precise and broad-spectrum color measurements with a single 3‑chip solution.