STMicroelectronics Announces Miniature Motion Sensor Improving Comfort and Measurement Accuracy for Medical Wearable and Implantable Devices
STMicroelectronics has unveiled the MIS2DU12, an ultra-small, ultra-low power MEMS accelerometer designed for medical wearable and implantable devices. Featuring biocompatible materials, it offers extended operating life with minimal power consumption (20nA in power-down, <1µA active). Its compact size (0.74mm thin, 2x2mm footprint) enhances comfort for patch sensors. The MIS2DU12 includes sensor fusion for high accuracy even with movement, a dedicated motion processing engine for various detections, and an anti-aliasing filter to reduce host processor load and overall system power. It supports selectable full-scale ranges, wide output data rates, and an extended temperature range, with a 128-level FIFO buffer for efficient data management. An evaluation board, STEVAL-MKI255A, is also available.
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📰 Published: March 30, 2026 at 05:11
STMicroelectronics (NYSE: STM, hereinafter ST) has announced the "MIS2DU12," a MEMS accelerometer that combines ultra-low power consumption, signal processing capabilities, and an ultra-small size, making it ideal for medical wearable and implantable devices.
Produced with 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, enabling long operating life in implantable devices such as heart monitors and pacemakers. With a thickness of just 0.74mm and a mounting area of 2 x 2mm, it also allows for ultra-thin, lightweight, and more comfortable patch-type sensors.
In patch-type sensors like blood glucose monitors and other biometric parameter sensors, the MIS2DU12's sensor fusion maintains high accuracy even under macroscopic movements and environmental stress. As a result, these applications benefit from high sensitivity to minute movements and high power efficiency. It incorporates a dedicated motion processing engine capable of free-fall, wake-up, single/double-tap, and active/inactive detection, as well as 6-axis/4-axis orientation detection. It also includes self-test functions and a temperature sensor.
Integrating motion processing circuits for event detection and wake-up, the MIS2DU12 is equipped with an anti-aliasing filter that maximizes the quality of output data. By removing vibration sources outside the band with this filter, it reduces the load on the host application processor and lowers overall system power consumption. The sensor's current consumption is only 0.47µA in ultra-low power active mode with a 1.6Hz output data rate, and it is suppressed to 5.6µA even when operating in normal mode with the anti-aliasing filter enabled.
The MIS2DU12 features selectable full-scale ranges 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, enabling large data storage and excellent flexibility, contributing to reduced system power consumption.
The "STEVAL-MKI255A" adapter board is also available for quick evaluation. This evaluation board, equipped with the MIS2DU12 sensor, features a standard DIL24 pin configuration and can be used in combination with the "STEVAL-MKI109D" evaluation board. This evaluation board is equipped with a high-performance 32-bit microcontroller and utilizes ST's "MEMS Studio" GUI.
