An analog-to-digital converter with a resolution booster is provided. The analog-to-digital converter may include a successive approximation analog-to-digital converter, a resolution booster, and an output combiner. The successive approximation analog-to-digital converter may be configured to convert an analog signal into digital data. The resolution booster may be selectively activated to enhance the resolution of the successive approximation analog-to-digital converter, and the output combiner may be configured to combine the respective outputs of the successive approximation analog-to-digital converter and the resolution booster.