Analysis Method of Compound ADC Modeling

Abstract

A new type of ADC with a precision of 10-bit and a sampling rate of 250M is implemented by modeling. The new composite ADC proposed in this paper achieves high power consumption and reduced area with high accuracy and medium speed by combining the advantages and disadvantages of pipeline ADC and SAR ADC. In this paper, the system modeling and simulation verification are carried out for the new composite structure ADC. In the premise of considering many non-ideal factors, the input end access 36.6MHz input signal, sampling clock frequency using 250MHz, the system can achieve SNR = 58.5dB, SFDR = 68.8dB, ENOB = 9.3 and other design indicators. The design of this system model provides the direction for the determination of important module design parameters in the actual circuit-level design system. At the same time, it provides the basis for analyzing the influence of various non-ideal factors on static and dynamic characteristics and the ADC energy in ADC system design.