Method for controlling an analog-to-digital converter

Method of controlling analog-to-digital converter, comprising:

• sampling a voltage to be converted by sampling a first component of the voltage to be converted on a first node of a first digital-to-analog converter and by sampling a second component of the voltage to be converted on a second node of a second digital-to-analog converter;
• determining most significant bits by successive approximations by controlling, at each of said successive approximations, the first and second digital-to-analog converters based on a comparison of the outputs of the first and second digital-to-analog converters;
• and
• determining least significant bits by a time-to-digital conversion comprising:
• the application, by a third digital-to-analog converter comprising the first node and having an output connected to the output of the first converter, of a first ramp of successive voltage offsets to the output of the first converter, and
• the application, by a fourth digital-to-analog converter comprising the second node and having an output connected to the output of the second converter, of a second ramp of successive voltage offsets to the output of the second converter,
• the first and second ramps varying in opposite directions determined by the comparison of the outputs of the first and second converters at an end of the conversion by successive approximations.