Ultrasonic Time-of-Flight (ToF) MEMS sensors for proximity and presence detection for next-generation devices
This product is now EOL. Please see other TDK sensing solutions here.
TDK’s SmartSonic™ family of ultrasonic Time-of-Flight (ToF) sensors empower IoT product development with contextual awareness, enabling the creation of products that adapt their response upon detecting the presence of the user or the characteristics of the surrounding environment.
Accurate range finding
Reliable distance measurement from a few centimeters up to 9 meters
Dramatic power savings
Ultra-low power consumption extends battery life: 1000x better than optical ToF (uA vs mA)
Consistent performance in real world conditions
Unaffected by lighting conditions or surface color, from bright sun to complete darkness
Flexible and future-ready design
Supports custom processing, on-device algorithms, and firmware updates
Reliable distance measurement from a few centimeters up to 9 meters
Ultra-low power consumption extends battery life: 1000x better than optical ToF (uA vs mA)
Unaffected by lighting conditions or surface color, from bright sun to complete darkness
Supports custom processing, on-device algorithms, and firmware updates
Discover how SmartSonic Ultrasonic ToF sensors bring presence and obstacle detection to life. From smart home and robotics to AR/VR gaming, see how engineers are using these sensors to create safer, smarter, and more immersive experiences—watch the video now.
Enable presence detection, distance measurement, and spatial awareness across a wide range of systems
Ultrasonic sensing solutions from short- to long-range, enabling scalable detection and spatial awareness across systems
Fast, ultra-low-power proximity and presence sensing for close-range interaction
Reliable object detection and ranging for room-scale awareness
Extended-range sensing for large-area detection and positioning
Stay up to date with the latest press releases, product launches, and innovations
Chirp’s MEMS based ultrasonic technology leverages a Time‑of‑Flight (ToF) range sensor with a power-efficient digital signal processor (DSP) ASIC in a 3.5 × 3.5 mm package. The sensor handles a variety of ultrasonic signal-processing functions and algorithms, enabling customers flexible industrial design options for a broad range of use-case scenarios, including range-finding, presence and proximity sensing, object-detection and avoidance, and position-tracking.
Find the CH101-00ABR (pulse-echo operation) Symbol, Footprint, and 3D model at SnapMagic.
Find the CH101-02ABR (pitch-catch operation) Symbol, Footprint, and 3D model at SnapMagic.
SonicLib is a set of API functions and sensor driver routines designed so an embedded C application can easily control TDK/Invensense ultrasonic sensors (originally developed by Chirp Microsystems). SonicLib allows an application developer to manage and obtain ultrasonic data from one or more devices, without needing to develop special low-level code to interact with the sensors directly.
HelloChirp is an example source code package that incorporates SonicLib and provides compile time options to show how various applications can be implemented using the ICU-x0201 sensors. The application can be compiled for DK-x0201 using the MPLAB X IDE, or cn serve as a starting point for porting to a different platform.
Explore our top ultrasonic-time-of-flight products
High-Performance Ultra-Compact Ultrasonic Time‑of‑Flight Sensor for Ultra-Long-Range Applications
The ICU-30201 is a high-performance ultrasonic Time-of-Flight sensor that is ideal for measuring the range of objects between 30cm and 9.5m, and offers a customizable field-of-view of up to 180º. It has a sample rate of 75 samples per second at 2 meters, and 18 samples per second at 9 meters. It comes in a 5.17 × 2.68 × 0.9 mm LGA package, and includes an integrated DSP for signal processing.
High-Performance Ultra-Compact Ultrasonic Time‑of‑Flight Sensor for Long-Range Applications
The ICU-20201 is a high-performance ultrasonic Time-of-Flight sensor that is ideal for measuring the range of objects between 20cm and 5m, and offers a customizable field-of-view of up to 180º. It has a sample rate of 150 samples per second at 1 meter, and 32 samples per second at 5 meters. It comes in a 3.5 × 3.5 × 1.26 mm LGA package, and includes an integrated DSP for signal processing.
High-Performance Ultrasonic Time‑of‑Flight Sensor
The ICU-10201 is a high-performance ultrasonic Time-of-Flight sensor that is ideal for measuring the range of objects between 10cm and 1.2m, and offers a customizable field-of-view of up to 180º. It has a sample rate of 250 samples per second at 0.3 meters, and 130 samples per second at 1 meter. It comes in a 3.5 × 3.5 × 1.26 mm LGA package, and includes an integrated DSP for signal processing.
Ultra-Low-Power Integrated MEMS Ultrasonic Time‑of‑Flight Range Sensor with Millimeter Accuracy
Chirp’s MEMS based ultrasonic technology leverages a Time‑of‑Flight (ToF) range sensor with a power-efficient digital signal processor (DSP) ASIC in a 3.5 × 3.5 mm package. The sensor handles a variety of ultrasonic signal-processing functions and algorithms, enabling customers flexible industrial design options for a broad range of use-case scenarios, including range-finding, presence and proximity sensing, object-detection and avoidance, and position-tracking.
Find the CH101-00ABR (pulse-echo operation) Symbol, Footprint, and 3D model at SnapMagic.
Find the CH101-02ABR (pitch-catch operation) Symbol, Footprint, and 3D model at SnapMagic.
Long-Range Ultra-Low-Power Integrated MEMS Ultrasonic Time‑of‑Flight Range Sensor with Millimeter Accuracy
Chirp’s MEMS based ultrasonic technology leverages a Time‑of‑Flight (ToF) range sensor with a power-efficient digital signal processor (DSP) ASIC in a 3.5 × 3.5 mm package. The sensor handles a variety of ultrasonic signal-processing functions and algorithms, enabling customers flexible industrial design options for a broad range of use-case scenarios, including range-finding, presence and proximity sensing, object-detection and avoidance, and position-tracking.
Explore our comprehensive development platforms custom developed for each sensor type.
Development Kit for ICU-10201, ICU-20201, and ICU-30201 Ultrasonic ToF Sensors
The DK-x0201 is a comprehensive development platform for ICU family of products.
Ultrasonic ToF
Comprehensive development platform for CH201, with the ability to connect up to four additional CH201 modules.
Comprehensive Development Platform for MOD_CH101
The DK-CH101 is a comprehensive development platform for MOD_CH101, a miniature ultrasonic transceiver with a range of 4 cm to 120 cm.
Find answers, documentation, and community support you need
Connect with engineers, ask questions, and share insights with the TDK developer community.
Access technical articles, datasheets, and in-depth guides to accelerate your design process.
Find immediate answers to our most frequently asked questions about products, shipping, and more.
