1. AD8512ARZ-REEL7 Substitution Conclusion The substitution feasibility for the AD8512ARZ-REEL7 is conditional. As a J-FET input amplifier, key differences include a significantly higher input bias current (25 pA vs. 4 pA). This can introduce greater DC error and drift in circuits sensitive to DC precision and leakage current, such as high-impedance sensor signal conditioning or integrators. Furthermore, its operating voltage range is narrower, with a minimum (10V vs. 9V) and maximum (30V vs. 36V) that may preclude direct use in existing designs operating near the original 9V or 36V supply limits. While it offers some advantages—including a higher gain-bandwidth product (8 MHz vs. 4.5 MHz), a slightly better slew rate (20V/µs vs. 18V/µs), lower quiescent current (2.2mA vs. 4.5mA) for improved power efficiency, and stronger output drive capability (70mA vs. 40mA)—the utility of these benefits depends entirely on the circuit's sensitivity to the aforementioned critical differences in input current and supply range.