IET Circuits, Devices and Systems, ( ISI ), Volume (12), No (2), Year (2018-3) , Pages (203-208)

Title : ( Low‐power successive approximation ADC using split‐monotonic capacitive DAC )

Authors: Fatemeh Shakibaee , Fereshte Sajedi , Mehdi Saberi ,

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A power-efficient successive approximation analogue-to-digital converter (SA-ADC) is proposed. In order to reduce the energy consumption of the employed capacitive digital-to-analogue converter (DAC), a new low-energy capacitor switching technique is proposed which consumes no switching energy during the first three comparison steps. Moreover, an energy-efficient split-monotonic technique is utilised for the rest of the operations. Compared with the capacitor switching technique used in the conventional SA-ADC, the proposed scheme not only reduces the switching energy by 99.23% but also it has lowered the total capacitor size by 75%. Furthermore, in order to realise the proposed capacitor switching scheme, a power-efficient logic circuit is designed which reduces the power consumption of the required control logic circuit by reducing the activity of the employed D-type flip-flops. Based on the proposed scheme, a 10 bit 40 kS/s SA-ADC has been designed and simulated in a 0.18 μm complementary metal-oxide semiconductor technology with a supply voltage of 1 V. Post-layout simulation results show that the proposed ADC circuit achieves a signal-to-noise-and-distortion ratio of 60.8 dB at the cost of 270 nW power consumption, resulting in a figure-of-merit of 7.6 fJ/conversion step.


, Successive approximation ADC, switching technique, low power
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author = {Shakibaee, Fatemeh and Sajedi, Fereshte and Saberi, Mehdi},
title = {Low‐power successive approximation ADC using split‐monotonic capacitive DAC},
journal = {IET Circuits, Devices and Systems},
year = {2018},
volume = {12},
number = {2},
month = {March},
issn = {1751-858X},
pages = {203--208},
numpages = {5},
keywords = {Successive approximation ADC; switching technique; low power},


%0 Journal Article
%T Low‐power successive approximation ADC using split‐monotonic capacitive DAC
%A Shakibaee, Fatemeh
%A Sajedi, Fereshte
%A Saberi, Mehdi
%J IET Circuits, Devices and Systems
%@ 1751-858X
%D 2018