Object of research - the process of functioning cyclic ADC with weight redundancy purpose is to improve the accuracy of the cyclic ADC by using weight redundancy, the methods used the theory of building the ADC and DAC with weight redundancy to analyze the possibility of digital self-calibration of the procedure for cyclic ADC, theoretical foundations electrical circuits for analog knots research, theory of errors, as well as the theory of probability and statistics for modeling static conversion errors before and after self-calibration, digital automata theory for synthesizing control schemes and calculation of conversion results, the theory of object-oriented programming for computer simulation of self-calibration procedures cyclic ADC with weight redundancy, as well as analysis of the results, the theoretical results - first proposed self-calibration method of cyclic ADC with weight redundancy by analysis of the input-output ADC, thus improving the accuracy of the converter, first proposed a method for constructing cyclic ADC with weight redundancy by introducing structural redundancy in the form of the gauge low ADC resolution and calibration signal generator in the basic structure, thus improving the accuracy of the transformation, was developed a method of analysis of the input-output ADC with weight redundancy, unlike existing allowed to define prohibited area code combinations, which allowed to calculate the operating value radix converters were undercut generalized mathematical model of static errors cyclic ADC, which, unlike existing, defined relationship between the primary errors of individual elements of the transducer and the input-output ADC, allowing organize static error and suggest ways to reduce them. The practical results - the results of research developed a number of practical solutions patents of Ukraine, including recommendations for the design of analog components of the cyclic ADC with weight redundancy, software for modeling of self-calibration cyclic ADC with weight redundancy; Algorithms calibration cyclic ADC with weight redundancy and a structural diagram of cyclic ADC with weight redundancy, which includes calibration ADC. Degree of implementation - the results introduced in the Institute of Electronics and Communications of the Ukrainian Academy of Sciences and the learning process of Vinnytsia National Technical University. Sphere of use - computer systems, high-information-measuring systems, multi-analog-digital systems.