Mixed-Signal MCU Ticketed For Portable Sensing

May 11, 2011
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On Semiconductor Q32M210

The Q32M210, built with the ARM Cortex-M3 processor, is the first in a new family of mixed-signal microcontrollers from On Semiconductor. Designed for precision measurement and monitoring, the device will find homes in portable-sensing applications.

Dual 16bit ADCs, an accurate voltage reference, triple 10bit DACs, and a 32bit core are packed into the MCU. The ultra-low-noise ADCs deliver true 16bit performance, avoiding the nonlinearity and noise problems that can reduce the number of effective bits. Power efficiency is another key feature, as it operates at less than 400µA/MHz

Predictable operation is essential for many applications, including portable medical devices such as patient monitors, wireless ECGs, and blood glucose meters, as well as other sensing applications that require improved flash-memory reliability. To that end, the Q32M210’s on-chip power supervision with dedicated brown-out protection circuitry and low-battery detection ensures predictable operation under all battery conditions. Integrated error checking and correction circuitry monitors the on-chip flash memory, detecting and correcting single-bit errors and alerting when larger errors are detected.

A highly configurable analog front-end with a programmable 32bit core and 256kbytes of flash memory form a flexible and scalable measurement engine. Critical on-chip functions include a real-time clock, power management, a 112-segment LCD interface, on-chip low-resistance switches, uncommitted op amps, a precision voltage reference (<50 PPM/°C), and an RC oscillator to reduce complexity and external component count.



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