1. Conclusion on BU7486FVM-TR Substitution From a direct replacement perspective, the BU7486FVM-TR cannot serve as a universal substitute for the OPA2369AIDGKR. The two devices are fundamentally different in their key performance specifications, and forcing a substitution would result in a radical change in system performance. The differences and their implications are as follows: First, there is a vast discrepancy in bandwidth and speed. The gain-bandwidth product (10 MHz) and slew rate (10 V/µs) of the BU7486FVM-TR are three orders of magnitude higher than those of the OPA2369AIDGKR (12 kHz, 0.005 V/µs). The latter is suitable only for DC or very low-frequency signal processing, such as conditioning slow-varying sensor signals, whereas the former can be used for analog signal processing in the audio band and beyond. Second, power consumption and voltage compatibility are completely mismatched. The OPA2369AIDGKR features an extremely low quiescent current (700nA per channel) and supports single-supply operation down to 1.8V, making it specifically designed for battery-powered, long-duration micropower applications. In contrast, the BU7486FVM-TR has a quiescent current of 6mA and a minimum operating voltage of 3V. Its power consumption is nearly 10,000 times higher, rendering it unsuitable for applications with strict power and voltage constraints. Finally, there is a distinction in precision. The input offset voltage of the OPA2369AIDGKR (250µV) is significantly better than that of the BU7486FVM-TR (1mV), making the former the superior choice in applications requiring high DC accuracy. The feasibility of substitution is highly dependent on the specific application scenario. A replacement could only be considered in a new design that prioritizes high speed at the expense of ultra-low power and low-voltage characteristics. Otherwise, substitution is not viable.