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Product Overview
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Product Overview
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TDK’s ultrasonic Time-of-Flight (ToF) sensors integrate a MEMS PMUT (Piezoelectric Micromachined Ultrasonic Transducer) with an ultra-low power SoC (System on Chip) in a miniature reflowable package.
These sensor solutions are capable of ranging to targets of any composition up to 5 meters in any lighting condition, making them ideal for a variety of applications including: obstacle avoidance, presence detection, robotics, security & surveillance, AR/VR, drones, liquid level sensing, smart home/building, and general IoT.

End user products using TDK technology

Kaadas K9-F 3D Face Push-Pull WiFi smart door lock

Utilizing TDK's SmartSonic™ CH201 UltraSonic ToF Sensor

SmartSonic™ Ultrasonic Time-of-Flight Sensors are powering the auto-wake function in the Kaadas K9-F 3D Face Push-Pull WiFi smart door lock. The ultra-low-power of the CH201 greatly extends the battery life of the lock. Follow the below links for more information.

Read Press Release   |  Visit Kaadas Website  |  View CH201 Product Page

SmartSonic™ Applications

Social Distancing



AR/VR Gaming

Ultra-low power and High Accuracy Ultrasonic ToF sensors accurately measure proximity breaches and provide warnings before crossing social distancing guidelines

Ultrasonic ToF sensors enable Cliff detection, material composition identification, and obstacle avoidance

Always-on ultra-low power Ultrasonic ToF sensors can detect the presence of a glass as well as the level of the liquid inside

Compact, low power ultrasonic ToF sensors enable user experiences in gaming under any lighting conditions

Presence Detection

Smart Locks

Smart Home & IoT


Ultra-low power and low latency Ultrasonic ToF sensors detect presence and minor motion under any lighting condition

Always-on battery powered smart locks utilize ultra-low power Ultrasonic ToF sensors to enable feature rich smart locks

Compact ultrasonic ToF sensors enable presence detection in any lighting condition

Compact and light weight ultrasonic ToF sensors enable range finding for obstacle avoidance and landing under any environmental condition

TDK SmartSonic™ Tech Explainer Video

Product Details




Sensor type Ultrasonic Time-of-Flight Ultrasonic Time-of-Flight Ultrasonic Time-of-Flight Ultrasonic Time-of-Flight
Technology MEMS – pMUT MEMS – pMUT MEMS – pMUT MEMS – pMUT
Max Operating Range
(Large surface)
1.2m 5.0m 1.2m 5.0m
Min Operating Range 0.04m 0.20m 0.04m 0.20m
Measuring Samples rate 130 Samples/s @ 1.2m 32 Samples/s @ 5m 100 Samples/s @ 1.1m 25 Samples/s @ 5m
Field of View Configurable up to 180° Configurable up to 180° Configurable up to 180° Configurable up to 180°
Digital Interface SPI (up to 13 MHz) SPI (up to 13 MHz) I2C I2C
Operating voltage Range 1.8V 1.8V 1.8V 1.8V
IOs voltage range 1.8 - 3.3V 1.8 - 3.3V 1.8V 1.8V
Package dimension 3.5 x 3.5 x 1.26 mm3 3.5 x 3.5 x 1.26 mm3 3.5 x 3.5 x 1.26 mm3 3.5 x 3.5 x 1.26 mm3
Operating range -40 - 85 °C -40 - 85 °C -40 - 85 °C -40 - 85 °C
Application Boards DK ICU-10201 DK ICU-20201 DK-CH101 DK-CH201
Target Applications, including but not limited to:
  • Floor type detection for robotic vacuums
  • Cliff detection for robotic vacuums
  • <1 m presence detection
  • 3D tracking
  • Pitch-catch ranging between wireless nodes
  • Gesture recognition
  • Augmented/Virtual Reality and Gaming
  • Low power user presence in consumer electronics
  • Parking lot sensors for vehicle counting
  • Smart door lock wake-on-approach
  • Obstacle avoidance and wall following
  • Ground level measurement in drones
  • Home/Building automation
  • Ultra-low power remote presence-sensing nodes
  • Augmented and Virtual Reality
  • Robotics/ RVC
  • Obstacle avoidance
  • Proximity/Presence sensing
  • Ultra-low power remote presence-sensing nodes
  • Home/Building automation
  • Liquid level sensing & shelf inventory monitoring
  • Augmented/Virtual Reality and Gaming
  • User presence in Home/Building Automation and Personal Electronics
  • Obstacle avoidance
  • Robotics and Drones
  • Mobile and Computing Devices
  • Ultra-low power Human Presence Detection
  • Gesture control
  • Proximity/Presence sensing

Development Products



Need to prototype with more than one ToF sensor? The DK-CH101 includes one CH101 with the option to add up to four additional ultrasonic modules.



Comprehensive development platform for CH201, with the ability to connect up to four additional CH201 modules.


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