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This application note describes a method for improving the absolute accuracy of the 12-bit analog-to-digital converter (ADC) found on the F2810/F2811/F2812 devices. Due to inherent gain and offset errors, the absolute accuracy of the ADC is impacted. The methods described in this application note can improve the absolute accuracy of the ADC to achieve levels better than 0.5%. This application note is accompanied by an example program (ADCcalibration.zip) that executes from RAM on the F2812 EzDSP.