Design and implementation of successive approximation register data converter

Abstract

Analog-to-Digital Converters (ADCs) serve as crucial interfaces between the analog and digital domains, facilitating the transformation of analog signals into digital representations. Data processing in the digital domain presents distinct performance advantages over the analog domain in particular aspects. To facilitate the reverse conversion of processed digital signals back into the real-world signal domain, Charge Redistribution Digital-to-Analog Converters (DACs) are employed. DACs also play a pivotal role as significant components in specific ADC architectures, such as the Successive Approximation Register (SAR) Analog-to-Digital (A/D) Converter. Moreover, a Strong-Arm Latch Comparator has been utilized to compare the input analog voltage with the output voltage of the DAC. This paper primarily focuses on the implementation and thorough analysis of the SAR-ADC. The study includes calculatinganalog voltages’ precise range and corresponding digital outputs. The maximum Differential Non-Linearity (DNL) error, offset error, and full-scale error for this specific SAR-ADC have been measured and found to be 0.28*LSB, 0.2*LSB, and 0.22*LSB, respectively. The results presented in this paper provide valuable insights into the performance and accuracy of the SAR-ADC, paving the way for further advancements and applications in the domain of A/D conversion.