A ‘Medical-Grade’ Motion Sensor from STMicroelectronics Jumpstarts Creation of New Implantable Applications

STMicroelectronics has introduced the MIS2DH, an ultra-low-power 3-axis accelerometer specifically designed for medical applications, including implantable devices classified by U.S. Food and Drug Administration (FDA) as Class III. ST has many years of experience in developing custom motion sensors for leading medical-equipment manufacturers and the MIS2DH distils this expertise into an off-the-shelf solution that can enable functions such as activity monitoring and posture sensing to be included in a wide range of medical applications.

Implantable medical devices such as cardiac pacemakers, ICDs (Implantable Cardioverter Defibrillator), and neurostimulators have been successfully used for many years to prolong the lives of patients with heart problems or to make life better for people with chronic pain conditions. Today, there is a growing interest in the medical world in exploring how new implantable devices could help treat other chronic problems such as high blood pressure, epilepsy, and tremor-related conditions. For most of these applications, an embedded accelerometer capable of measuring the activity and posture of the patient is important to manage the stimulus delivered by the implantable device and therefore to improve the effectiveness of the treatment and the wellbeing of the patient.

The MIS2DH accelerometer has been developed and produced in full compliance with the rules of ST’s medical domain, a self-regulation that ST adopted in 2012 to secure the development and manufacturing flow for products intended for use in sensitive medical applications.

Key technical features of the MIS2DH include:

  • 3-axis accelerometer;
  • ultra-small size (2×2×1 mm);
  • ultra-low power consumption (down to 2 μA in low-power mode);
  • ±2g/±4g/±8g/±16g selectable full-scale;
  • 8-, 10- and 12-bit operating modes;
  • 1 Hz – 5 KHz output data rate;
  • FIFO buffer and programmable interrupt to minimize system power consumption;
  • I2C/SPI digital outputs;
  • 1.71 -3.6 V operating voltage.

The MIS2DH is available now in volume. Please contact your ST sales office for pricing options and sample requests.