1. INA154U/2K5 Substitution Conclusion The INA154U/2K5 can substitute the AD629BRZ-R7, but the application scenario must be rigorously evaluated. Key differences include: the INA154 offers significantly higher bandwidth (3.1 MHz) and slew rate (14 V/µs) compared to the AD629 (500 kHz, 2.1 V/µs), providing superior dynamic performance for high-frequency or fast transient signals. However, the INA154's quiescent current (2.4 mA) is approximately 2.7 times that of the AD629 (900 µA), leading to higher power dissipation, and its minimum supply voltage (8 V) is higher than the AD629's (5 V), which restricts its use in low-voltage applications. Furthermore, the AD629, as a dedicated current-sense amplifier, typically features higher common-mode rejection ratio (CMRR) and a design optimized for wider input voltage ranges, making it more suitable for demanding environments such as high-side current sensing. In contrast, the INA154, being a general-purpose differential amplifier, may require additional verification of its common-mode rejection capability in such applications. If the application is not sensitive to power consumption and minimum operating voltage, and does not demand extremely high CMRR, the INA154 can serve as a replacement by leveraging its superior bandwidth. Otherwise, retaining the original part is recommended.