2. Substitution Conclusion for BU7486F-E2 Partially feasible, but requires careful evaluation. The BU7486F-E2 outperforms the original part in speed performance: its gain‑bandwidth product (10 MHz) and slew rate (10 V/µs) are both higher than those of the LMP2012 (3 MHz, 4 V/µs), giving it an advantage when processing higher‑frequency signals or requiring faster transient response. However, there are significant differences in key DC accuracy parameters: its input offset voltage (1 mV) is four orders of magnitude higher than that of the LMP2012 (0.12 µV). This makes it unsuitable for front‑end measurement circuits that demand high‑precision amplification, such as precision sensor interfaces or medical instrumentation. Additionally, its quiescent current (6 mA) is considerably higher than that of the LMP2012 (930 µA), leading to greater power consumption, and its minimum operating voltage of 3 V restricts use in systems operating below 3 V. This device can only be considered as a substitute in applications where speed and bandwidth are prioritized, and where strict requirements for DC accuracy, ultra‑low power consumption, and low‑voltage operation are not critical.