1. BA2902SFV-E2 Substitution Conclusion Direct substitution is not recommended due to significant degradation in key performance parameters. The slew rate (0.2 V/µs) and gain-bandwidth product (500 kHz) of the BA2902SFV-E2 are notably lower than those of the original LM324KAPW (0.5 V/µs, 1.2 MHz). This results in insufficient response speed when handling high-frequency signals or fast transients, potentially leading to waveform distortion or dynamic error. Additionally, while its lower quiescent current (700 µA) benefits power consumption, the associated performance downgrade may compromise the bandwidth and accuracy settings of the original circuit. Substitution may only be cautiously considered in simple DC or low-frequency applications where bandwidth and transient response are extremely non-critical and low power consumption is prioritized.