Research on Simulation Design of ADC Driver Chain Based on Ltspice

The ADC driver chain plays a role in balancing the input signal in the ADC working circuit, which can enhance the performance of the acquisition system in terms of bandwidth specifications and noise levels. This paper provides a detailed analysis of the ADC input conditions and the principle of balanced driving. Using LTspice software, a study on the design and simulation of the ADC front-end driver chain is conducted. First, an ADC driver circuit based on ADA4930 is presented, and the circuit is simulated using LTspice software for transient simulation, frequency domain simulation, and output noise level simulation. The simulation results show that under the condition of single-ended input, the function of output differential common-mode adjustment is achieved, and the noise level reaches 75.824 μVrms.