UVA Click is a compact add-on board used to detect solar UV index. This board features the GUVA-C32SM, an ultraviolet light sensor capable of measuring UV index between 0 to 14 from Genicom Co., Ltd. It contains the GaN-based chip die, amplifiers, ADC, digital control logic, and I2C interface circuit to measure UVA volumes, working in the spectral range of 220-370nm. The GUVA-C32M can acquire the intensity of UVA, respectively, and outputs digital count according to each intensity. By using the available power management mode properly according to the work to be done, the power consumption can be reduced. This Click board™ is suitable for various applications, such as determining exposure to ultraviolet radiation in a laboratory or environmental settings, weather stations, industrial manufacturing, and many more.

UVA Click is supported by a mikroSDK compliant library, which includes functions that simplify software development.

UVA Click as its foundation uses the GUVA-C32SM, an ultraviolet light sensor capable of measuring UV index between 0 to 14 from Genicom Co., Ltd. The GUVA-C32SM contains the GaN-based chip die, integrated amplifiers, analog-to-digital converter, digital control logic, and serial interface circuit to measure detected solar UV index in the spectral range of 220-370nm. The GUVA-C32M acquires the intensity of UVA, respectively, and outputs digital count according to each intensity. A reasonable power management mode can reduce power consumption according to specific application requirements.

UVA Click communicates with MCU using the standard I2C 2-Wire interface to read data and configure settings, supporting Standard Mode operation with a clock frequency of 100kHz and Fast Mode up to 400kHz. Since the sensor for operation requires a 3.3V logic voltage level only, this Click board™ also features the PCA9306 voltage-level translator from Texas Instruments. The I2C interface bus lines are routed to the dual bidirectional voltage-level translator, allowing this Click board™ to work with both 3.3V and 5V MCUs properly.

This Click board™ can operate with both 3.3V and 5V logic voltage levels selected via the VCC SEL jumper. This way, it is allowed for both 3.3V and 5V capable MCUs to use the communication lines properly. However, the Click board™ comes equipped with a library that contains easy-to-use functions and an example code that can be used, as a reference, for further development.

• Interface: I²C
• Compatibility: mikroBUS™
• Dimensions: 28.6 x 25.4mm
• Input Voltage: 3.3V or 5V
• UV Index Range: Min. 0, Max. 14
• Resolution: 16 bits
• Operating Temperature Range: Min. -30°C, Typ. +25°C, Max. +85°C

• Schematic
• PCA9306 Datasheet
• GUVA-C32SM Datasheet
• mikroSDK
• LibStock