The 7SEMI AS7343 Spectral Sensor Module is based on the ams OSRAM AS7343, a compact multi-channel sensor that provides 14 independent spectral channels spanning UV, visible, and near-IR ranges (350–1000 nm).
Designed for color analysis, material classification, light calibration, and spectral fingerprinting, this breakout board makes integration easy with a 3.3 V I²C interface, breakout headers, and mounting holes. It also features an onboard user LED and interrupt pin for event-driven designs.
Technical Specifications
Sensor (AS7343)
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Spectral channels: 14 (13 discrete + 1 clear).
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Spectral range: 350–1000 nm.
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Typical FWHM: ~20–40 nm (channel-dependent).
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ADC resolution: 16-bit.
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Digital interface: I²C @ up to 1 MHz.
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Supply voltage: 2.7–3.6 V (board powered via 3.3 V pin).
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Operating temperature: –30 °C to +85 °C.
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Input: 3.3 V regulated.
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Pins: 3V3, GND, SCL, SDA, GPIO, INT.
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I²C address: 0x39 (fixed).
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Dimensions: ~19.05mm × 17.94 mm PCB.
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Mounting: 2× M3 holes.
Applications
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Color measurement & spectral analysis
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Ambient light sensing & calibration
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Material classification / sorting
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Optical spectroscopy (portable devices)
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Agriculture, health & wearable monitoring
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Display and LED color calibration
What’s Included
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1× 7SEMI AS7343 Spectral Sensor Module
FAQ
Q1. What microcontrollers can I use with this board?
Any MCU with I²C support (Arduino, ESP32, STM32, Raspberry Pi).
Q2. What is the default I²C address?
The module responds at 0x39.
Q3. Can I measure near-infrared (NIR) light?
Yes, selected channels cover up to 1000 nm.
Q4. Is there a built-in light source?
Yes, the board has a user LED for reflectance measurements.
Q5. Does it require 5 V tolerance?
No — the board is 3.3 V only, use a level shifter for 5 V systems.
Resources
- Wavelength Range:
- 350 nm to 1000 nm
- Spectral Channels:
- 14 (13 discrete + 1 clear)
- ADC Resolution:
- 16-bit
- I²C Address:
- 0x39 (fixed)
- Interface:
- I²C (up to 1 MHz)
- Supply Voltage:
- 2.7 V – 3.6 V (3.3 V typical)
- Operating Temperature:
- –30 °C to +85 °C
- Mounting holes:
- 2× M3
