1. OP07CDE4 Substitution Conclusion The OP07CDE4 cannot serve as a direct drop‑in replacement for the OP90GSZ, as their key electrical parameters differ significantly. The OP07 is primarily suited for applications with different supply voltage and dynamic response requirements. The main distinctions are as follows: First, supply voltage range – the OP07 has a minimum operating voltage of 6 V, whereas the OP90 can operate down to 1.6 V. This makes the OP07 unsuitable for any single‑cell battery or ultra‑low‑voltage power systems. Second, dynamic performance – the OP07 offers a much higher slew rate (0.3 V/µs) and gain‑bandwidth product (600 kHz) compared to the OP90 (0.012 V/µs), indicating that the OP07 is appropriate for medium‑speed signal processing, while the OP90 is only suitable for very low‑frequency or static measurements. Third, input accuracy – the OP07 exhibits lower input bias current (1.8 nA) and offset voltage (60 µV) than the OP90 (4 nA, 125 µV), giving it an advantage in applications demanding high DC precision. If the application circuit operates at a supply voltage ≥6 V and does not rely on ultra‑low‑power characteristics, the OP07 can be considered a high‑performance alternative; otherwise, system compatibility must be re‑evaluated.