Equivalent Number of Bits of the ADC in the Implementation of Its Input Driver Based on High-Speed Operational Amplifiers

The article presents a mathematical analysis of a typical driver connection scheme to an analog-to-digital converter (ADC) with a differential input. The influence of circuit solutions, as well as the most significant parameters of the driver (Driver) on operational amplifiers, switched on at the input of ADC, on the equivalent bit depth of the ADC is considered. From a single point of view, an estimate is given of the reduction in the effective bit depth of the ADC, taking into account the signal delay in the parallel ADC driver. The purpose and novelty of this article is to present an analysis of the block diagram of the automatic monitoring and control system (MCS), in which the driver is located at a safe distance from the primary converter. In conclusion, the article presents the dependence of the total effective bit rate on the parameters of the ADC and the ADC driver.