Desenvolvimento de métodos de testes para caracterização de ADCS do tipo Σ∆

Abstract

The present work of conclusion of course approaches the implementation of test

methods for characterization of Sigma-Delta type ADCs. For the construction and vali- dation of such methods, circuits modeled in the Matlab software of a second-order Sigma- Delta modulator were used. Through the simulation results, data were obtained that

effected the development of the measurement methods, through the digital signal proces- sing and the respective basing of standards, as in the case of the IEEE 1241 standard.

Subsequently, through a test bench, bitstream data was extracted from three second or- der Sigma-Delta modulators in order to specify their characteristics through the methods

described in this work. The test methods provide static and dynamic specifications, such as static gain, offset voltage, DNL and INL, referring to the former and, SNR, SINAD, ENOB, THD and dynamic range, referring to the latter.