1. ADA4891-2ARMZ-RL Substitution Conclusion Direct substitution is not feasible and can only be marginally considered in specific high-speed, non-precision scenarios, requiring a re-evaluation of the system design. The advantage of the ADA4891-2ARMZ-RL lies in its extremely high slew rate (210 V/µs vs. 11.5 V/µs) and slightly higher gain bandwidth product (105 MHz vs. 88 MHz). It can handle faster-changing signals and is suitable for high-speed data acquisition or video driving. Its key disadvantages are a high input offset voltage of 2.5 mV (250 times worse than the LMP7718's 10 µV) and an input bias current of 2 pA (20 times higher than 0.1 pA). It completely lacks the "precision" characteristics of the original part. In applications requiring high DC accuracy and low error, such as sensor amplification or precision measurement, it would introduce unacceptable errors. Furthermore, its quiescent current (4.4 mA per channel) is 3.4 times that of the original part (1.3 mA per channel), resulting in significantly increased power consumption, making it unsuitable for battery-powered devices.