A pipelined analog-to-digital converter (ADC) comprises a first stage that
receives an input voltage signal and that comprises an analog-to-digital
converter (ADC). The ADC includes an amplifier having an input and an
output. N capacitances are connected in parallel and include first ends
that selectively communicate with the input and second ends. N switches
selectively connect the second ends of the N capacitances to the voltage
input during a first phase, one of the second ends of the N capacitances
to the output of the amplifier during a second phase, and others of the
second ends of the N capacitances to one of a voltage reference and a
reference potential during the second phase. A second stage communicates
with the output the amplifier.