1. MCP6H72T-E/SN Substitution Conclusion The MCP6H72T-E/SN can be considered as a potential replacement for the LMC6492AIM in terms of package compatibility and basic functionality. However, key performance differences limit its feasibility for direct substitution. The main discrepancies are evident in three aspects: First, input accuracy is significantly degraded. The input offset voltage of the MCP6H72T (1 mV) is nearly ten times higher than that of the original part (110 µV), while its input bias current (10 pA) is two orders of magnitude greater. In applications requiring high‑precision signal amplification, such as sensor front‑ends, substitution may introduce noticeable DC errors and reduced stability. Second, the supply voltage range is narrower. The minimum operating voltage of the MCP6H72T is 3.5 V, compared to 2.5 V for the original device, which restricts its use in low‑voltage systems, e.g., those powered by a single lithium‑ion cell. Third, there is a performance trade‑off. Although the MCP6H72T offers advantages in bandwidth (2.7 MHz vs. 1.5 MHz), slew rate (2 V/µs vs. 1.3 V/µs), output drive capability (53 mA vs. 30 mA), and lower quiescent current, its core accuracy metrics fall short of those required for the original part’s intended high‑precision, low‑current measurement applications. Consequently, it is suitable only for general‑purpose signal conditioning circuits where precision is not critical.