Circuit and method for converting analog signal to digital value representation

A circuit for converting an analog signal to a digital value representation, comprising:

• an incremental sigma-delta analog-to-digital converter (ADC) having an input for receiving the analog signal and an output for outputting a sequence of digital values corresponding to samples of the received analog signal;
• a first input line for providing a primary analog signal representing a sensor measurement to the input of the incremental sigma-delta ADC;
• a second input line for providing a secondary analog signal to the input of the incremental sigma-delta ADC,
• wherein the input of the incremental sigma-delta ADC receives the primary analog signal from the first input line during a first period of analog-to-digital conversion and receives the secondary analog signal from the second input line during a second period of analog-to-digital conversion;
• and
• a filter configured to receive the sequence of digital values from the incremental sigma-delta ADC, to weight the digital values in the sequence of digital values and to output a single digital value representing the sensor measurement, wherein the second period is at least partly overlapping with a third period during which a voltage representing the sensor measurement settles.