The Proximity and Ambient Light Sensor by SystematIC integrates ambient light and infrared proximity sensing functions into a single system-on-chip. It adeptly measures ambient light from minimal lux levels to bright daylight, independent of light source types. The proximity sensor function operates effectively even in varying ambient light environments, using sophisticated rejection algorithms to maintain accuracy. It enhances user interfaces by adjusting screen brightness dynamically in response to environmental light conditions and can also support presence detection in both industrial and automotive sectors.