1. ISL28114FEZ-T7A Substitution Conclusion The ISL28114FEZ-T7A is compatible with the original TSV621AICT in terms of package (SC70-5) and basic functionality (single rail-to-rail output operational amplifier). However, significant differences exist in key performance parameters, requiring careful evaluation of substitution feasibility. The main differences include: The gain bandwidth product (5 MHz) and slew rate (2.5 V/µs) of the ISL28114FEZ-T7A are substantially higher than those of the original part (420 kHz, 0.14 V/µs), giving it stronger dynamic response and signal processing capability, making it suitable for higher frequency or fast transient applications. Its quiescent current (300 µA) is an order of magnitude higher than the original's (29 µA), which will lead to a significant increase in power consumption and makes it unsuitable for power-sensitive, low-power devices. Furthermore, its minimum operating voltage (1.8 V) is slightly higher than the original's (1.5 V), potentially limiting its use in ultra-low voltage scenarios, while its output drive current (31 mA) is lower than the original's (74 mA), resulting in weaker heavy load driving capability. If the application has strict requirements for low power consumption and low voltage, or requires strong output drive, substitution may not be suitable. Conversely, if higher bandwidth and slew rate are needed and higher power consumption is acceptable, substitution can be considered.