STMicroelectronics Announces Small Motion Sensor that Improves Comfort and Measurement Accuracy in Medical Wearables and Implantable Devices

STMicroelectronics (NYSE: STM, hereinafter ST) has announced the "MIS2DU12", a MEMS accelerometer that combines ultra-low power consumption, signal processing capabilities, and ultra-small size, making it ideal for medical wearable and implantable devices. Produced using biocompatible materials and manufacturing processes, the MIS2DU12 features a current consumption of just 20nA in power-down mode and less than 1µA in active mode, realizing a long operating life in implantable devices such as cardiac monitors and pacemakers. Achieving a thinness of just 0.74mm and a 2 x 2mm footprint, it also enables patch-type sensors to be ultra-thin and lightweight, and improves wearing comfort. For patch-type sensors such as blood glucose monitors and other biometric parameter sensors, the sensor fusion of the MIS2DU12 allows them to maintain high accuracy even under macroscopic movements and ambient environmental stress. Therefore, these applications benefit from high sensitivity to microscopic movements and high power efficiency. Integrating a dedicated motion processing engine, it is capable of detecting free fall, wake-up, single/double tap, and active/inactive states, as well as 6-axis/4-axis orientation detection. It also features a self-test function and a temperature sensor. Integrating a motion processing circuit for event detection and wake-up, the MIS2DU12 is equipped with an anti-aliasing filter, maximizing output data quality. By removing vibration sources out of band with this filter, it reduces the load on the host application processor and reduces overall system power consumption. The current consumption of this sensor can be kept down to just 0.47μA in an ultra-low power active mode with a 1.6Hz output data rate, and 5.6µA even when operating in normal mode with the anti-aliasing filter enabled. The MIS2DU12 features selectable full scales of ±2g / ±4g / ±8g / ±16g, output data rates from 1.6Hz to 800Hz, and a wide operating temperature range of -40°C to +85°C. It integrates a 128-level FIFO buffer, realizing large-capacity data storage and excellent flexibility, and contributes to system power consumption reduction. The "STEVAL-MKI255A" adapter board is also available to quickly start evaluation. This evaluation board equipped with the MIS2DU12 sensor has a standard DIL24 pin layout, so it can be used in combination with the "STEVAL-MKI109D" evaluation board. This evaluation board is equipped with a high-performance 32-bit microcontroller and can utilize ST's "MEMS Studio" GUI. The MIS2DU12 is provided in a plastic LGA package (2.0 x 2.0 x 0.74mm) and is expected to be available by the end of the first half of 2026. The unit price is approximately $9 when purchasing 1,000 units. The evaluation board "STEVAL-MKI109D" is also available. For more information, please visit the website. ST's new medical motion sensor products were exhibited at Embedded World 2026 (March 10-12, Hall 4A, Stand 148) held in Nuremberg, Germany. About STMicroelectronics: ST is a global integrated semiconductor manufacturer with approximately 48,000 employees, a comprehensive supply chain, and cutting-edge manufacturing facilities. Working with over 200,000 customers and thousands of partner companies, ST develops semiconductor solutions and builds ecosystems that support customer business creation and sustainable societies. ST's technologies enable the widespread adoption of smart mobility, more efficient power and energy management, and cloud-connected autonomous devices. ST is advancing initiatives to achieve carbon neutrality for all direct and indirect emissions (Scope 1 and 2), as well as emissions from product transportation and employee business travel/commuting (focus areas of Scope 3), and plans to reach 100% renewable energy usage by the end of 2027. For more detailed information, please visit ST's website (http://www.st.com). ◆ Customer Contact: STMicroelectronics K.K. Analog, MEMS & Sensor Product Group 2-15-1 Konan, Minato-ku, Tokyo 108-6017 Shinagawa Intercity Tower A TEL: 03-5783-8250