1. AD8601WARTZ-RL Substitution Conclusion Direct substitution is not recommended. The AD8601WARTZ-RL is a high-performance general-purpose operational amplifier whose core advantages lie in its high bandwidth (8.4 MHz) and high slew rate (6V/µs), significantly exceeding the dynamic performance of the original part. Its critical flaw is that it is not a zero-drift amplifier. Its input offset voltage (1.3 mV) is approximately 650 times higher than that of the ISL28133 (2 µV), and its input bias current (200 nA) is nearly four orders of magnitude greater. In applications requiring high DC precision, low offset, and extremely low input current—such as sensor signal conditioning and precision measurement—this will introduce unacceptable errors. Furthermore, its quiescent current (750µA) is over 40 times higher than that of the original part (18µA), completely negating the core feature of ultra-low power consumption. Substitution is only feasible if the application solely focuses on AC performance and has no requirements for power consumption or precision.