1. BU7486FVM-TR Substitution Conclusion Direct substitution is not recommended. Although the package is compatible and both are rail-to-rail output dual op-amps, there is a severe degradation in one key performance metric and a fundamental difference in one characteristic: Its quiescent current (6mA) is over 14 times higher than that of the original part (~420µA). Substitution would lead to a drastic increase in system power consumption, completely negating the core low-power advantage of the original device. This makes it unsuitable for power-sensitive applications such as battery-powered systems. Furthermore, it is a CMOS amplifier. While this provides very high input impedance (bias current of 1pA) and faster speed (slew rate of 10V/µs, bandwidth of 10MHz), these advantages come at the cost of higher power consumption. Additionally, its output drive capability (12mA) is weaker than that of the original part (40mA), which could become a bottleneck when driving significant loads.