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A flexible algorithmic ADC for wireless sensor nodes

: Gustafsson, E.M.I.; Rusu, A.; Ismail, M.; Neubauer, H.; Hauer, J.


Institute of Electrical and Electronics Engineers -IEEE-:
The 15th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2008. Proceedings : St. Julian's, Malta, 31 August - 3 September 2008
Piscataway, NJ: IEEE, 2008
ISBN: 978-1-424-42181-7
International Conference on Electronics, Circuits and Systems (ICECS) <15, 2008, St. Julian's>
Fraunhofer IIS ()

This paper presents the behavioral level modeling and circuit implementation of a flexible algorithmic ADC that can be used for Bluetooth and CDMA2000-1X receivers, and sensor applications. An accurate behavioral level model of the ADC has been implemented in Matlab/Simulink, including the most important circuit non-idealities. This model allows exhaustive behavioral simulations, to achieve an optimal design. The accurate behavioral model shows that a dynamic range of 60 dB can be achieved for a bandwidth up to 1.25 Mega Samples Per Second (MSPS), which is sufficient for Bluetooth and CDMA2000-1X standards, and medium resolution sensors. The highest achievable sampling rate is 2.8 MSPS. The transistor level implementation of the ADC in a 0.35 mum CMOS process shows that the analog part of the ADC consumes 11 mW of power from a 3.3 V supply.