1. ADA4665-2ARZ Substitution Conclusion The ADA4665-2ARZ is compatible with the original part TLV2372IDR in terms of function, package (dual-channel, rail-to-rail output, 8-SOIC), and maximum supply voltage (16V), making direct substitution a possibility. However, the impact of the following key differences must be carefully evaluated: First, the ADA4665-2ARZ has a minimum operating voltage of 5V, whereas the TLV2372IDR can operate down to 2.7V. If the original design operates at a supply voltage below 5V (e.g., a 3.3V system), substitution is completely unfeasible. Second, the gain-bandwidth product (1.2 MHz) and slew rate (1 V/µs) of the ADA4665-2ARZ are approximately half those of the TLV2372IDR (3 MHz, 2.1 V/µs). This may lead to performance degradation in applications requiring higher bandwidth or fast transient response after substitution, potentially limiting signal bandwidth or large-signal processing speed. Third, the ADA4665-2ARZ features lower quiescent current (290 µA vs. 750 µA) and lower input bias current (0.1 pA vs. 1 pA). This represents a beneficial improvement in applications where low power consumption or high-impedance signal sources are critical. In summary, the feasibility of substitution depends heavily on the specific application. If the original system operates at a supply voltage ≥5V and does not demand high dynamic performance, the ADA4665-2ARZ can serve as a more power-efficient alternative with higher input precision. Conversely, if the system relies on low-voltage supply or requires higher bandwidth and speed, substitution is not viable.