BU27030NUC Ambient Light Sensor ROHM Semiconductor BU27030NUC Ambient Light Sensor is optimized for obtaining ambient light data for adjusting the display and backlight power of TVs and smartphones. This device is capable of detecting a very wide range of illuminance. The BU27030NUC features inherent 50Hz/60Hz light noise rejection and excellent IR-cut characteristics for high robustness at high sensitivity. This sensor communicates via a digital serial I2C bus interface with f/s mode support.