1. LMV358QD Substitution Conclusion Based on core parameters, the LMV358QD can serve as a contingency or low-cost replacement in applications where key specifications are not critical. However, it is unsuitable for high-precision or ultra-low-power designs. The main differences are as follows: First, its input offset voltage (1.7 mV) is significantly higher than that of the original part (800 µV), which introduces greater output error when amplifying weak DC signals, leading to a notable reduction in accuracy. Second, its quiescent current (210 µA) is nearly five times that of the original (45 µA), directly resulting in substantially shorter standby time in battery-powered devices. Third, its minimum operating voltage is 2.7 V, higher than the original’s 1.8 V, making it incompatible with single-cell or low-voltage systems operating between 1.8 V and 2.7 V. Although it offers higher slew rate and output current, the core advantages of the original part—high precision, low power consumption, and wide supply voltage range—are significantly compromised.