1. LM258DRG3 Substitution Conclusion The LM258DRG3 cannot directly replace the original LT1469CS8-2PBF, despite sharing the same package and both being dual general-purpose operational amplifiers. The core discrepancy lies in their vastly different performance tiers: the LT1469 is a high-speed, high-precision op-amp (slew rate 30 V/µs, gain-bandwidth product 200 MHz, offset voltage 50 µV), whereas the LM258 is a general-purpose, low-power op-amp (slew rate 0.3 V/µs, bandwidth 700 kHz, offset voltage 3 mV). If the original circuit relies on high-speed signal processing (e.g., video, RF, or precision data acquisition), substitution will result in severe bandwidth insufficiency, sluggish dynamic response (slew rate is 100 times slower), and significantly degraded accuracy (offset voltage is 60 times worse), potentially causing signal distortion or system failure. Substitution may only be marginally acceptable if the circuit operates at low-frequency DC or in non-critical applications with no speed/accuracy requirements, and where low power consumption is prioritized (the LM258's quiescent current is only 1/8 that of the LT1469). Even in such cases, stability must still be verified.