Analog-to-digital converters and methods for settling of the reference voltage in analog-to-digital converters

A method of settling a reference voltage in a plurality of time-interleaved analog-to-digital converters (ADCs) sharing a common reference voltage source, the method comprising:

• generating, on a common reference voltage line along which the plurality of ADCs are connected, for a respective ADC of the plurality of ADCs, an analog reference voltage;
• and
• connecting, at the time of generating the analog reference voltage and based on the value of the analog reference voltage to be generated, a pre-charged capacitor of the respective ADC to the reference voltage line to reduce a voltage error during the generation of the analog reference voltage by the respective ADC,
• wherein the capacitance value and/or the charge level of the pre-charged capacitor in a respective ADC is determined based on the position of the respective ADC on the common reference voltage line.

An analog-to-digital converter (ADC) configured to convert an input analog voltage into a digital representation, the ADC comprising:

• a digital-to-analog converter (DAC) configured to generate an analog reference voltage on a reference voltage line;
• a pre-charged capacitor;
• and
• a controller configured to:
• connect, during a generation of the analog reference voltage by the DAC, the pre-charged capacitor to the reference voltage line to reduce a voltage error during the generation of the analog reference voltage by the DAC.