Abstract-A new method for switching the capacitors in the DAC capacitor array of a successive approximation register (SAR) ADC is presented. By splitting the MSB capacitor into b − 1 binary scaled sub-capacitors, the average switching energy of the array can be reduced by 37% compared to a conventional switching method. A formal solution of the switching energy in four different switching methods is included, and the equations are verified using HSPICE simulations of a 10b capacitor array in a 0.18µm CMOS process.

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Low-power impulse UWB architectures and circuits The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters.

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