1. LM358DGKR Substitution Conclusion From the perspective of core functionality and pin compatibility, the LM358DGKR can serve as a replacement for the original part. However, there are critical parametric differences that require attention. Its advantages include a higher gain-bandwidth product (800 kHz vs. 500 kHz) and slew rate (0.3 V/µs vs. 0.2 V/µs), enabling it to handle higher frequency signals at the same gain and offering faster large-signal response. It also provides a higher output current (40 mA vs. 30 mA), resulting in stronger drive capability. On the downside, its input offset voltage is larger (3 mV vs. 2 mV), which may introduce greater error in applications demanding high DC precision. Furthermore, its upper supply voltage limit is slightly lower (30V vs. 32V), posing a risk if the original circuit operates close to 32V. Additionally, its quiescent current is specified as 500 µA per channel (approximately 1 mA total), which is significantly higher than the total power consumption of the original part, making it less suitable for low-power designs such as battery-powered systems. For general-purpose applications not operating at voltage extremes, where power consumption is not critical and slightly lower DC precision is acceptable, the substitution is viable.