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Multiple MSP ultra-low-power microcontrollers offer analog-to-digital converters (ADCs) to convert physical quantities into digital numbers, a function that is widely used across numerous applications. There are times, however, when a customer design demands a higher resolution than the ADC of the selected MSP can offer. This application report, which is based on the previously-published Oversampling the ADC12 for Higher Resolution (SLAA323), therefore describes how an oversampling method can be incorporated to increase ADC resolution past the currently available number of bits. Code example projects (available for download from http://www.ti.com/lit/zip/slaa694) and detailed instructions are provided for the MSP430FR4133 and MSP432P401R microcontrollers but can be modified so that oversampling is supported for a myriad of MSP MCU derivatives, sampling frequencies, and extra bits of resolution.

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