DocumentCode :
2952349
Title :
A novel energy efficient digital controller for charge sharing successive approximation ADC
Author :
Rabuske, Taimur G. ; Rabuske, Taimur G. ; Rodrigues, Cesar R.
Author_Institution :
Microelectron. Group, Fed. Univ. of Santa Maria (UFSM), Santa Maria, Brazil
fYear :
2011
fDate :
23-25 Feb. 2011
Firstpage :
1
Lastpage :
4
Abstract :
Successive approximation analog-to-digital converters are very attractive to power-constrained applications due to the topology inherent energy efficiency. This converter architecture most often relies on digital controller circuit to guide the conversion algorithm, and this controller is reported to have an important impact on the overall power consumption, sometimes demanding roughly half the total energy of a given ADC. Therefore, the design of an efficient controller must be of main concern in an ultra-low power ADC. In this paper we present a novel full-custom controller, based on true single phase clock latch, and provide simulation results. The proposed implementation achieves an extreme power reduction using only 13.4% of the energy of a standard cells implementation. We also propose a figure of merit (FOM) to controllers, and use it to compare our topology to a range of state-of-the art ADCs. According to this FOM, the proposed controller exhibits the smallest amount of energy per processed bit currently reported for SAR ADCs.
Keywords :
analogue-digital conversion; digital control; low-power electronics; analog-to-digital converter; conversion algorithm; converter architecture; digital controller circuit; energy efficient digital controller; extreme power reduction; power-constrained application; single phase clock latch; topology inherent energy efficiency; ultra-low power ADC; CMOS integrated circuits; Clocks; Converters; Integrated circuit modeling; Simulation; Topology; Transistors;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Circuits and Systems (LASCAS), 2011 IEEE Second Latin American Symposium on
Conference_Location :
Bogata
Print_ISBN :
978-1-4244-9484-2
Type :
conf
DOI :
10.1109/LASCAS.2011.5750295
Filename :
5750295
Link To Document :
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