1. LM258DRG3 Substitution Conclusion The LM258DRG3 is physically compatible with the AP358SG-13 in terms of package, supply voltage range, and output current, making direct substitution mechanically feasible. However, significant technical differences exist, limiting its recommendation to conditional replacement only in non-critical differential signal applications. Key distinctions include: (1) Output Type: The AP358SG-13 features differential outputs, whereas the LM258DRG3 does not specify this characteristic (typically single-ended). The latter cannot directly replace the former in precision measurement or interface circuits requiring differential signal drive. (2) Gain Bandwidth Product: The LM258DRG3 (700 kHz) is lower than the AP358SG-13 (1 MHz), which may degrade signal-to-noise ratio or response speed in high-frequency applications. (3) Input Offset Voltage: The LM258DRG3 (3 mV) is slightly higher than the AP358SG-13 (2 mV), potentially introducing greater error in amplification circuits with stringent DC accuracy requirements. (4) Power Consumption Advantage: The LM258DRG3 supply current (500 μA per channel) is notably lower than the total current of the AP358SG-13 (1 mA), making it more suitable for low-power designs, albeit at the expense of certain performance parameters. If the original circuit relies solely on general-purpose amplification without requiring differential outputs, and can tolerate slightly reduced bandwidth and accuracy, the LM258DRG3 may serve as a cost-effective or low-power alternative. Otherwise, system compatibility must be re-evaluated.