1. LT1464CS8PBF Substitution Conclusion The LT1464CS8PBF cannot be directly substituted for the original LM2904AS-13, primarily due to incompatible supply voltage ranges (10–30V for LT1464 vs. 3–36V for LM2904). The LT1464 is unable to operate in low-voltage systems (e.g., 3V), and its J‑FET input stage differs fundamentally from the general‑purpose bipolar design of the LM2904, resulting in significantly different input characteristics. Furthermore, the LT1464 offers a higher slew rate (0.9 V/µs vs. 0.3 V/µs) and gain‑bandwidth product (1 MHz vs. 700 kHz), making it more suitable for high‑frequency signal processing. Its lower input bias current (0.5 pA vs. 20 nA) and input offset voltage (600 µV vs. 1 mV) provide higher accuracy and reduced error, which is advantageous for high‑impedance sources or precision measurements. Additionally, the lower supply current per channel (145 µA vs. 700 µA) reduces power consumption, benefiting energy‑sensitive applications. These advantages are meaningful only when the supply voltage matches and the application demands higher performance; otherwise, direct substitution may cause system failure or degraded performance. If the original design relies on wide‑supply‑voltage operation or low‑voltage functionality, substitution is not feasible. If the application allows supply adjustment and requires higher precision, speed, and lower power, the LT1464 can be considered as an upgrade option, but circuit compatibility must be re‑evaluated.