1. BU7486F-E2 Substitution Conclusion Direct substitution is not recommended. Although the BU7486F-E2 is a rail-to-rail output dual op-amp, its minimum operating voltage is 3V (compared to 1.8V for the original part), which cannot cover the low-voltage application scenarios of the original design. Its output current is only 12mA (versus 100mA for the original part), resulting in severely insufficient drive capability that may fail to meet load requirements. Additionally, its quiescent current is as high as 6mA (compared to only 232µA for the original part), leading to significantly increased power consumption. However, being fabricated in CMOS technology, it offers extremely low input bias current (1pA), making it suitable for high-impedance sensor signal processing. Its higher slew rate (10V/µs) and bandwidth (10MHz) also make it applicable for higher-frequency signals. Substitution could be considered only if the application is strictly limited to supply voltages above 3V, light loads, and requires high input impedance; otherwise, it is not compatible.