Modeling and simulation of 8-bit Current-Mode Successive Approximation Registers ADC by using Simulink

Abstract

Nowadays the modeling is very important step in the integrated circuits design. For complex circuit architecture such as the Data Converter, in this paper, we developed new ideal model of 8-bit current-mode successive approximation analogue to digital converter (SAR-ADC). The proposed model is implemented in Matlab Simulink environment; the system is modeled by constructing a set of subsystems in SIMULINK environment with different blocks, non-ideal effects are not yet implemented, the main blocks of current-mode SAR ADC are a current sample and hold, a current comparator, SAR logic register and current steering digital to analogue converter (DAC). The simulation results with the static and dynamic performance, confirm the good performance and the high accuracy of the model.