Slope analog-to-digital converter and a method for analog-to-digital conversion of an analog input signal

A slope analog-to-digital converter, ADC, for converting an analog input signal to a digital representation, said ADC comprising:

• an input unit comprising a sampling capacitor, wherein the input unit is configured to receive the analog input signal during an initial period for obtaining a sampled value of the analog input signal and wherein the input unit is configured to, during a conversion period, hold the sampled value of the analog input signal across the sampling capacitor between a first terminal and a second terminal of the sampling capacitor;
• and
• a comparator which is configured to determine a most significant bit of the analog input signal during the initial period;
• wherein the ADC during the conversion period is configured to receive a slope signal and to be adapted based on the determined most significant bit such that the comparator is further configured to adaptively compare the sampled value and the slope signal for converting the sampled value to a digital representation.