  This paper presents a 17 bit analogue-to-digital converter that incorporates
mismatch and quantisation noise-shaping techniques into an energy-saving 10 bit
successive approximation quantiser to increase the dynamic range by another 42
dB. We propose a novel fully-capacitive topology which allows for high-speed
asynchronous conversion together with a background calibration scheme to reduce
the oversampling requirement by 10x compared to prior-art. A 0.18 um CMOS
technology is used to demonstrate preliminary simulation results together with
analytic measures that optimise parameter and topology selection. The proposed
system is able to achieve a FoMS of 183 dB for a maximum signal bandwidth of
15.6 kHz while dissipating 68 uW from a 1.8 V supply. A peak SNDR of 102 dB is
demonstrated for this rate with a 0.201 mm^2 area requirement.
