1. ISL28114FEZ-T7 Substitution Conclusion From the perspective of core performance and package compatibility, the ISL28114FEZ-T7 can conditionally replace the original LMV821AICT part. Both are general-purpose, rail-to-rail output operational amplifiers in an SC-70-5 package and share identical quiescent current. The primary differences are as follows: The input bias current of the ISL28114FEZ-T7 (3 pA) is significantly lower than that of the original part (60 nA). This represents a major advantage in applications with high-impedance signal sources, substantially reducing input bias error. Its offset voltage (500 µV) is also slightly better. However, its output drive capability (31 mA) is only 44% of the original part's (70 mA). When driving low-impedance or heavy capacitive loads, the substitute may risk reduced slew rate, diminished bandwidth, or even instability. On the other hand, its wider lower supply voltage limit (1.8V) is beneficial for low-voltage designs. If the application circuit does not demand high output current, this substitution is viable and offers improved input performance. If driving larger current loads is required, the substitution carries risk.