Reliability Analysis and Fault Prediction of A/D Converter Based on Acceleration Model

The A/D converter with high-precision and reliable is the key core device to realize the acquisition of aircraft analog signal. By controlling the fusing state of the repair and adjustment fuse, the connection relationship between the benchmark debugging element, clock debugging element and ADC nuclear repair and adjustment capacitor can be accurately controlled. In the process of fracture of fuse wires at high temperature, if the spacing is too small and the stress is released, individual poly-crystalline fragments are able to contact each other, resulting in abnormal decline of fuse impedance, which will lead to error of data collection. Aiming at the early elimination of fuse fragmentation impedance anomalies, a defect elimination method based on Arrhenius temperature stress acceleration model is proposed. According to the Weibull failure probability distribution model, the number of fault components in the fault batch is predicted and confirmed by FIB test process, which improved the reliability of A/D converter.