1. ADA4665-2ARZ Substitution Conclusion The ADA4665-2ARZ can serve as a substitute for the TS912AIYDT, but it is a non‑fully‑compatible replacement and requires careful evaluation. The key differences are as follows: 1) Its minimum operating voltage is 5 V, significantly higher than the 2.7 V of the TS912, making it unsuitable for single‑supply systems at 3.3 V or lower. 2) Its output drive current is 30 mA, lower than the 75 mA of the TS912, resulting in weaker capability to drive heavy loads (such as capacitive or low‑impedance loads). 3) Its quiescent current is slightly higher (290 µA vs. 230 µA), which may have a minor impact on power‑sensitive applications. 4) It lacks AEC‑Q100 automotive qualification and therefore cannot be used directly in applications that mandate this certification. However, its input bias current (0.1 pA) and input offset voltage (1 mV) are substantially better than those of the original part, representing a clear advantage in applications requiring high precision and high input impedance. If the application operates at a supply voltage ≥5 V, drives light loads, and does not require automotive qualification, the ADA4665-2ARZ is a viable high‑performance alternative offering superior accuracy and bandwidth.