1. AD746JRZ Substitution Conclusion The AD746JRZ exhibits significant deviations from the original OPA2130UA/2K5 in key specifications: its slew rate (75 V/µs) and gain bandwidth product (13 MHz) are substantially higher than those of the original part (2 V/µs, 1 MHz), making it suitable for high‑speed signal processing. However, its quiescent current (7 mA) is also considerably higher, leading to a notable increase in power dissipation. Moreover, the input bias current (110 pA) is an order of magnitude larger than the original’s 5 pA, which can adversely affect signal accuracy in high‑impedance sensor interfaces. Additionally, the minimum operating voltage of 9 V (versus 4.5 V for the original) restricts its use in low‑voltage applications. If the system demands high speed and can tolerate the increased power consumption and bias current, the AD746JRZ may serve as a performance‑upgrade substitute, but power supply design, thermal management, and input error must be re‑evaluated.