1. TL3472QDRQ1 Substitution Conclusion The TL3472QDRQ1 can essentially replace the BA3472YF-LBH2 in terms of core performance, but three key differences must be noted: First, the input offset voltage of the TL3472QDRQ1 (1 mV) is significantly lower than that of the original part (10 mV), giving it a clear advantage in applications requiring high‑precision DC amplification. Second, its minimum operating voltage is 4 V, higher than the 3 V of the original device; this makes it incompatible if the system supply voltage is near or below 4 V. Third, its package is a narrow‑body SOIC (3.90 mm wide), differing physically from the original’s wide‑body SOIC (4.40 mm wide), so PCB layout space must be verified. Additionally, the TL3472QDRQ1 is AEC‑Q100 qualified, making it suitable for harsh environments such as automotive electronics, whereas the original is a general‑purpose industrial part. The former typically offers better reliability and a wider operating temperature range. Provided the supply voltage is ≥4 V and the package dimensions are acceptable, the substitution is feasible and can bring improvements in both precision and reliability.