Ultrasonic MEMS (Micro-Electro-Mechanical Systems) devices have rapidly evolved in the recent years, opening new potential markets especially in medical, imaging and automotive fields. An application-specific integrated circuit (ASIC) provides an efficient way to generate and acquire signals from the ultrasonic MEMS device, and is essential for good performance of the ultrasonic system in terms of high sensitivity (RX and TX), low noise, low power consumption and low area footprint.