ams OSRAM AS7331 3-Channel UV-A/B/C Spectral Sensor ICs
ams OSRAM AS7331 3-Channel UV-A/B/C Spectral Sensor ICs are low-power, low-noise integrated UV sensors. The devices offer three separate UVA, UVB, and UVC channels that convert optical radiation signals via photodiodes to a digital result and enable a continuous or triggered measurement.
The ams OSRAM AS7331 sensor ICs provide adjustable irradiance responsivity through the Gain, conversion time, and internal clock frequency to affect sensitivity, full-scale range, and LSB. The detected amount of radiation in the set Gain and conversion time configuration is presented as digital counts by the AS7331. The AS7331 features a range of 12x Gain steps by a factor of two for each step. Additionally, the conversion time is internally controlled over an expansive 15-step range by a factor of two for each step. With the input pin (SYN), the device can externally control the conversion time to adjust the measurement to the conveyed environment and time base.
Features
- Three separated UV detectors with interference filter technology
- High dynamic range up to 3.43E+10 (16-Bit to 24-Bit ADC)
- High sensitivity up to 421 counts/(µW/cm²) in UVA, smaller than LSB 2.38nW/cm² (at 64ms integration time)
- Adjustable I2C addresses
- Low-power operation, power-on reset, power-down, and standby in a small OLGA package
- Integrated temperature sensor
Applications
- UV-disinfection (water, air, surfaces)
- UV-curing
- Phototherapy
- Analytics
- Home appliances
- Horticulture
Videos
Block Diagram
Additional Resources
Associated Eval Kit
ams OSRAM AS7331 Evaluation Kit
The kit allows initial sensor measurements by implementing the AS7331 spectral UV sensor.