Sensor integrated circuits (ICs) are everywhere and can measure almost any type of physical stimuli. From measuring the ambient temperature and humidity of a room to detecting cars and other obstacles on the road, sensor ICs are the “senses” of a modern system – helping systems more quickly and reliably react to the world around them.

Sensor ICs are typically designed for a specific modality or type or sensing; current, voltage, humidity, proximity, radar, etc. Recent sensor IC technology innovations have focused on integrating more capabilities into the IC while also increasing overall accuracy and reliability for its given modality. These innovations have led to better system performance, increased energy efficiency and – in some cases –new applications.

One example is the continuous monitoring of a car’s interior and exterior with low-power radar sensing. In the past, radar sensing consumed too much power to be used continuously when the car engine was off. With innovations in millimeter-wave (mmWave) radar sensors, 360° continuous monitoring of a car for unauthorized access or unattended children is now possible.