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SiP sol'n offers precision sensing in portable medical devices

Posted: 18 Sep 2014 ?? ?Print Version ?Bookmark and Share

Keywords:ON Semiconductor? System-in-Package? microcontroller? ARM Cortex? medical electronics?

ON Semiconductor has unveiled what it says is a semi-customisable System-in-Package (SiP) solution for precision sensing and monitoring in various mobile medical electronics including glucose monitors, heart rate monitors and electrocardiogram analysers. Struix, which means "stacked" in Latin, uses advanced die stacking technology to integrate a custom-designed analogue front-end (AFE) on top of a 32bit application specific standard product (ASSP) microcontroller (ULPMC10), to form a complete miniature system.

By using standard and customisable components, Struix offers medical device manufacturers the design flexibility required to create unique medical sensor interface applications while improving time-to-market and cost-effectiveness, noted ON Semi.

The ULPMC10 microcontroller element of Struix processes signals using 32bit ARM Cortex-M3 core capable of running up to frequencies of 30MHz. The microcontroller incorporates 512KB on-chip Flash memory and 24KB SRAM memory to store critical program and user data. Designed to improve battery life in portable devices, ULPMC10 offers superior performance with minimal dynamic and static power demands. Through on-chip charge pump-based power conversion and regulation, the microcontroller can operate at a current consumption of less than 200uA/MHz. While in standby mode, current consumption remains below 500nA, a critical parameter for low-duty cycle medical devices.

The system's advanced power management subsystem monitors the device for fail-safe operation with a wide variety of battery voltages without requiring external components. The microcontroller also includes a12bit ADC with three multiplexed inputs, a real-time clock, a phase-locked-loop and a temperature sensor. To simplify product development, ON Semi offers a comprehensive and easy-to-use suite of development add-ins for IAR Systems to support the ULPMC10 microcontroller, including CMSIS based software interfaces, added the company.





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