CH101 Distance Sensor TDK InvenSense CH101 Distance Sensor is a miniature and ultra-low power ultrasonic Time-of-Flight (ToF) range sensors that are based on Chirp’s patented MEMS technology. The CH101 Sensor comes in a system-in-package that integrates Piezoelectric Micromachined Ultrasonic Transducer (PMUT) together with an ultra-low-power System on Chip (SoC) in a miniature, reflowable package. This distance sensor are fast and provide accurate range measurements to targets at distances up to 1.2m. The CH101 Distance Sensor can detect multiple objects and works in any lighting conditions including full sunlight and provides millimeter-accurate range measurements. This sensor features a low-power microcontroller running advanced ultrasound firmware, dedicated programmable range interrupt pin, and a single sensor for receive and transmit.