Additive Improvement of the MSP430 14-Bit ADC Characteristic

This application report shows different simple methods to improve the accuracy of the 14-bit analog-to-digital converter of the MSP430 family. They all use only addition for the correction of the analog-to-digital converter characteristic. Different correction methods are explained--all without the need for multiplication--which makes them usable for real time systems like electronic electricity meters. The methods used differ in RAM and ROM allocation, reachable improvement, and complexity. The external hardware for the measurement of the analog-to-digital converter characteristic is also described. For all correction methods, proven, optimized software examples are given. The References section at the end of the report lists application reports in the MSP430 14-bit ADC series.