1. ISL28207FBZ-T13 Substitution Conclusion From the perspective of key electrical parameters and package, the ISL28207FBZ-T13 comprehensively outperforms the original LM258DRG3 in precision, bandwidth, and power consumption. Its input bias current (15 pA vs. 20 nA) is three orders of magnitude lower, and its input offset voltage (5 µV vs. 3 mV) is nearly 600 times lower. This translates to significantly superior DC precision and stability in applications involving weak signals or high-impedance sources, such as precision sensor amplification and integrator circuits. The higher gain-bandwidth product (1 MHz vs. 700 kHz) and slightly higher slew rate (0.32 vs. 0.3 V/µs) provide better AC small-signal and transient response. Furthermore, its lower quiescent current helps reduce overall system power consumption. The most critical limitation is the supply voltage range. The ISL28207FBZ-T13 has a minimum operating voltage of 4.5V, whereas the LM258 can operate down to 3V or even lower. Therefore, it cannot directly substitute in original designs based on a single 3.3V or lower supply rail. For designs with a supply voltage ≥4.5V that prioritize high precision and low power, the ISL28207FBZ-T13 is an excellent upgrade and replacement. However, it is not viable for low-voltage systems operating at ≤3.3V.