1. TSU102IST Substitution Conclusion The TSU102IST cannot directly replace the AD8532ARMZ-R2, as the two amplifiers are designed for fundamentally different application scenarios, with core performance metrics differing by orders of magnitude. The TSU102IST is an ultra-low-power, low-bandwidth CMOS amplifier (gain bandwidth product of only 9 kHz, slew rate 0.003 V/µs), whose advantages lie in its extremely low quiescent current (650 nA per channel) and low input offset voltage (100 µV). It is suitable for low-frequency or DC signal conditioning and battery-powered portable devices. In contrast, the AD8532ARMZ-R2 is a general-purpose amplifier offering significantly higher bandwidth (3 MHz) and slew rate (5 V/µs), capable of handling mid-frequency applications such as audio and sensor signal conditioning, and its output drive capability (250 mA) far exceeds that of the TSU102IST (11 mA). Forcing a substitution in an original mid-frequency or dynamic signal path would result in severely insufficient system bandwidth, signal distortion, or even functional failure. Substitution may only be considered in specific applications where power consumption is extremely critical and signal frequencies are very low (e.g., slow-varying physical quantity monitoring), but system stability and drive requirements must be re-evaluated.