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MCU-Slide11

Part of what makes this analog integration “intelligent” is how all of these components can interact. Microchip has offered a few tips for engineers to get started with their designs. First, each analog module can be individually turned on or off when needed to save power. Second, some MCUs like the “GC” have DMA enabled DACs which would eliminate processor overhead and provide faster response. Also, integrated buffered DACs eliminate the need for an external buffer. Additionally, by integrating the DAC into MCU, the DAC can be used as input or reference to an OpAmp, Comparator or ADC internally making the interconnections between the various modules simple. Microchip’s OpAmps can be configured in high speed mode for faster response and also in low speed mode to save power depending on the application. Next, the internal voltage references can be used as references for the integrated analog modules as well. Finally, the Charge time Measurement Unit (CTMU) that is mainly used for capacitive sensing can be used as constant current source for sensors and can measure capacitance, inductance, resistance, temperature or time.

PTM Published on: 2013-11-29