1. AD8610ARZ Substitution Conclusion In applications where the supply voltage is ≤26V and extreme precision is not the primary objective, the AD8610ARZ serves as an excellent substitute for the OPA602AU, offering comprehensive upgrades in bandwidth, slew rate, and accuracy. However, its higher bandwidth may introduce additional stability risks that require attention. Specifically, the core advantages of the AD8610ARZ lie in its higher gain bandwidth product (25 MHz vs. 6.5 MHz) and slew rate (60V/µs vs. 35V/µs), delivering significantly superior performance when handling high-frequency or fast transient signals. Its input offset voltage (85 µV vs. 1 mV) is also notably lower, contributing to improved DC accuracy. Key differences include its lower maximum supply voltage (26V vs. 36V), which restricts its use in higher-voltage power environments. Additionally, its J-FET input architecture differs from the "standard" (typically bipolar) input of the original part. While the input bias current (3 pA vs. 2 pA) remains similarly ultra-low, subtle characteristics such as the noise spectrum may differ, necessitating verification in demanding designs.