1. Conclusion on Substituting BU7266FVM-TR Substitution is essentially not viable and is only applicable in extremely specific scenarios. The BU7266FVM-TR exhibits orders-of-magnitude inferiority in key dynamic performance compared to the original LMV822AIST. Its gain-bandwidth product (4 kHz vs. 5.5 MHz) and slew rate (0.0024 V/µs vs. 1.9 V/µs) are extremely low, rendering it completely incapable of handling any mid-to-high frequency or fast-changing signals. It is suitable only for ultra-low frequency or DC applications. Furthermore, its output drive capability (4 mA vs. 70 mA) is significantly weaker than the original part, resulting in severely inadequate load-driving capacity. It cannot drive loads such as analog loads or subsequent circuitry. Its sole significant advantage is an ultra-low quiescent current (700nA vs. 300µA/channel), but this is insufficient to compensate for its major functional shortcomings as a general-purpose amplifier. Additionally, it lacks the AEC-Q100 automotive-grade qualification of the LMV822AIST, making it unsuitable for automotive or high-reliability applications. 2. Conclusion on Substituting BU7486FVM-TR Substitution is conditionally feasible and suitable for general industrial applications, but key differences must be evaluated. The BU7486FVM-TR offers superior dynamic performance to the original part, with a higher gain-bandwidth product (10 MHz vs. 5.5 MHz) and slew rate (10 V/µs vs. 1.9 V/µs), enabling it to better handle higher frequency or steeper signals. Its extremely low input bias current (1 pA vs. 60 nA) is an advantage of its CMOS process. However, its input offset voltage (1 mV vs. 800 µV) is worse, potentially requiring additional calibration in applications demanding high DC precision. The primary limitation is its weaker output drive capability (12 mA vs. 70 mA), and it similarly lacks AEC-Q100 qualification. It can serve as a substitute in non-automotive, general industrial applications where high output current is not critical and where higher bandwidth or lower input bias current may be beneficial. However, substitution is not feasible if the original design relies on high drive capability, high DC precision, or automotive-grade reliability.