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TDK’s SmartSonic family of ultrasonic Time-of-Flight sensors enables IoT devices with contextual awareness, allowing products to adapt intelligently to user presence and environmental conditions.
Ultrasonic ToF
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TDK SmartSonic™
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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.
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Ultrasonic Time-of-Flight (ToF) MEMS sensors for proximity and presence detection for next-generation devices
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Sensing that enables intelligent, adaptive IoT systems
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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.
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Accurate range finding
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Reliable distance measurement from a few centimeters up to 9 meters
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Dramatic power savings
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Ultra-low power consumption extends battery life: 1000x better than optical ToF (uA vs mA)
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Consistent performance in real world conditions
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Unaffected by lighting conditions or surface color, from bright sun to complete darkness
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Flexible and future-ready design
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Supports custom processing, on-device algorithms, and firmware updates
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SmartSonic sensors across every range
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Featured SmartSonic Sensors
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Explore our top ultrasonic-time-of-flight products
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Ultrasonic sensing solutions from short- to long-range, enabling scalable detection and spatial awareness across systems
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Development kits
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Short-range
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- Enable touchless control, hand gesture detection, and wake-on-approach
- Deliver centimeter-level accuracy for precise short-distance sensing
- Optimize power consumption for always-on, battery-powered systems
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Fast, ultra-low-power proximity and presence sensing for close-range interaction
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Mid-range
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- Enable 1-5 m detection for appliances, robotics, and indoor systems
- Support multipath and static target rejection for accurate measurements
- Enable multi-sensor configurations for enhanced system coverage
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Reliable object detection and ranging for room-scale awareness
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Long-range
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- Enable 5–9 m+ detection for smart home and industrial environments
- Support occupancy detection and spatial awareness in large spaces
- Maintain accuracy with static target rejection and multi-sensor support
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Extended-range sensing for large-area detection and positioning
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Explore our comprehensive development platforms custom developed for each sensor type.
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SmartSonic features you can build on
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Power-efficient, accurate, and reliable ultrasonic sensing for adaptive, real-world system performance
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Featured SmartSonic updates
Git hub resources section
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Ultrasonic SonicLib
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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.
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ICU-x0201 HelloChirp example
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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.
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Applications made possible with SmartSonic sensors
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Enable presence detection, distance measurement, and spatial awareness across a wide range of systems
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AR/VR gaming
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With Ultrasonic ToF sensors, develop precise, low-latency tracking for controllers, wearables, and room-scale experiences, while ultra-low power extends playtime
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Appliances
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Detect the presence of a drinking glass as well as the level of the liquid inside
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Smart locks
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Ultrasonic ToF sensors enable proximity detection, image recognition in smart locks allowing always-on extended battery power
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Hospitals & clinics
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Accurately sense proximity ranges to provide reminders for social distancing guidelines
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Smart Sonic GitHub Resources
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Stay up to date with the latest press releases, product launches, and innovations
