Case Studies

DMC designed an ultra low power medical device

Ultra Low Power Medical Device Design

Posted in Application Development, Circuit Design, Embedded Development & Programming, Internet of Things (IoT), Pharmaceutical and Medical, Product Development

Summary

DMC designed an electronic gauge with extremely low power consumption for a client in the medical industry.

Solution

A client in the medical industry wanted to replace the analog gauge on their compressed gas tanks with an battery-powered electronic gauge requiring very low power consumption. They also wanted the ability to display important information beyond the tank pressure.

DMC developed an embedded architecture made for very low-power applications. Optimizations within the firmware leverage the low-power capabilities. Low-power modes on the chip turn off the peripherals unless an event occurs (e.g. the pressure drops low). The device remains in a low-power "sleep" mode consuming little battery power. The chip is woken when needed and uses only a minimum amount of battery.

The end result is a device that remains responsive while consuming very little power, with only micro amps drawn from the device for the majority of its use. The gauge now takes flow into account as well as pressure and computes time remaining. Tanks are alarmed for low battery and low pressure, and operators who charge refill the tanks can now easily determine how much time is remaining on each tank.

Learn more about DMC's Embedded Design and Programming services.

Customer Benefits

  • Alarming system for medical compressed gas tanks
  • Easy-to-read gauge
  • 5-year battery life
  • Designed to meet IEC 60601-1-2 for Medical Devices

Technologies

  • Silicon Labs ARM Cortex controller
  • FSTN Segmented LCD
  • Ceramic Pressure Sensor with precision strain bridge instrumentation amplifier 
  • Flexible Membrane Potentiometer
  • Piezo Buzzer