1. LT1498IS8 Substitution Conclusion Direct substitution of the LT1498IS8 for the ADA4610-2ARZ-RL is high-risk and only feasible under very limited conditions, disregarding differences in package and temperature range suffix. The core discrepancies are as follows: The input bias current of the LT1498IS8 (250 nA) is approximately 50,000 times higher than that of the ADA4610 (5 pA). In applications involving high-impedance signal sources, precision integration, or current sensing, this will introduce significant input error, completely negating the advantage of the JFET op-amp's ultra-high input impedance and near-zero input current. Furthermore, its slew rate (6V/µs) is drastically lower than the ADA4610's (61V/µs), resulting in severe inadequacy for large-signal dynamic response and full-power bandwidth, potentially causing significant signal distortion. Additionally, its output drive capability (30 mA) is relatively weak. The sole potential advantage is a wider supply voltage range (2.2V to 36V). Substitution is not recommended unless the application is entirely unconcerned with input current, involves very slow signal changes, and has low drive current requirements.