SparkFun Mini Spectral UV Sensor AS7331 w/ Qwiic Connect (UVA, UVB, UVC)

Sparkfun ElectronicsSKU: RB-Spa-2267
Manufacturer #: SEN-23518

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  • SparkFun Mini Spectral UV Sensor AS7331 w/ Qwiic Connect
  • Measures UVA, UVB, UVC
  • High accuracy with filters
  • Compact 1x0.5 inch size
  • Easy I2C communication
  • Low power consumption

The SparkFun Mini Spectral UV Sensor AS7331 w/ Qwiic Connect (UVA, UVB, UVC) is equipped with the AS7331 UV sensor from ams OSRAM©, designed to measure ultraviolet radiation across three distinct channels: UVA, UVB, and UVC. Each channel utilizes individual photodiodes with interference filters to ensure high sensitivity and accuracy in readings. The compact breakout board, with dimensions of 0.5 inches by 1 inch, supports multiple operating modes including Single Measurement, Continuous Measurement, and both Synchronized Start and Synchronized Start & End, all featuring an automatic power-down sequence to minimize current consumption.

Communication with the AS7331 sensor is facilitated via I2C protocol, and the board conveniently provides access to the I2C bus pins through a Qwiic connector for easy, solderless assembly. Additionally, a through-hole header is available for those who prefer a more permanent, soldered connection, which also includes pins for the sensor's Interrupt and Sync functions. The sensor offers four selectable I2C addresses, which can be configured by adjusting the solder jumpers on the board.

To assist with rapid deployment, a dedicated Arduino library has been developed for the AS7331, simplifying the configuration process and data acquisition from the sensor. The SparkFun Qwiic Connect System, to which this sensor belongs, is a cohesive collection of I2C-compatible components that streamline prototyping and reduce the likelihood of connection errors.

Please note that the sensor requires an operating voltage between 2.7V and 3.6V and has three distinct power modes to accommodate various energy consumption needs. The sensor's high dynamic range and the presence of two Qwiic connectors underscore its versatility and ease of integration into a wide array of projects.

  • 1x SparkFun Mini Spectral UV Sensor AS7331 w/ Qwiic Connect (UVA, UVB, UVC)
  • Qwiic Mini Footprint: 1 x 0.5 inch

  • Operating Voltage: 2.7V - 3.6V
  • Current Consumption:
    • Active Measurement: 1.42 mA (Typ.)
    • Standby Mode: 970 µA
    • Power Down Mode: 1 µA
  • Three UV Channels: UVA, UVB, & UVC, each with a dedicated photodiode
  • Four Operating Modes:
    • Single Measurement
    • Continuous Measurement
    • Synchronized Start Measurement
    • Synchronized Start/Stop Measurement
  • High Dynamic Range: Up to 3.43E+10 (resolution multiplied by gain range)
  • 2x Qwiic Connectors
  • Four Adjustable I2C Addresses: Set through A0 & A1 pins, 0x74 (Default), 0x75, 0x76, & 0x77

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