Method and Apparatus for SAR Analog-to-Digital Conversion

A method comprising:

• generating, by use of a successive approximation register (SAR) analog-to-digital converter (ADC), a first digital data and a second digital data for an analog data, the first digital data and the second digital data each having N bits;
• determining whether the second digital data includes a first sequence of bits having same values as the first sequence of bits of the first digital data, the first sequence of bits starting from a first most significant bit (MSB);
• when the second digital data includes the first sequence of bits having the same values as the first sequence of bits of the first digital data, determining, based on whether a condition is satisfied, whether to generate a third digital data of N bits for the analog data using the SAR ADC in a partial mode;
• and
• when the condition is satisfied, generating the third digital data in the partial mode, the generating comprising:
• setting value(s) of a second sequence of bits of the third digital data with respective value(s) of the second sequence of bits of the second digital data, the second sequence of bits starting from the first MSB, and the second sequence of bits comprising less than N bits;
• and
• determining values of remaining bits of the third digital data using the SAR ADC.