Original Part
Alternative Part
1. OPA602AU Substitution Conclusion
Direct substitution of the OPA602AU is generally not recommended. The substitute features a general-purpose (non-J-FET) input stage, resulting in a lower input bias current (2 pA) but a significantly higher input offset voltage (1 mV) compared to the original's 300 µV. This may compromise DC accuracy in precision applications. Additionally, its slew rate (35 V/µs) and bandwidth (6.5 MHz) are notably lower than those of the AD744JRZ (75 V/µs, 13 MHz), potentially degrading high‑speed signal processing performance. Substitution could be considered only in applications where DC precision and dynamic response are not critical and low input bias current is prioritized.
2. TLE2071ACD Substitution Conclusion
The TLE2071ACD offers a viable substitution option. As a J‑FET op‑amp of the same type, its input bias current (20 pA) and offset voltage (470 µV) are close to the original specifications, providing comparable DC performance. While its slew rate (45 V/µs) and bandwidth (10 MHz) are slightly lower than the original part, they remain within the same order of magnitude and are suitable for most mid‑to‑high‑speed applications. Furthermore, the TLE2071ACD exhibits lower quiescent current (1.7 mA), higher output current capability (48 mA), and a wider supply voltage range (4.5–38 V), making it advantageous in low‑power, high‑load‑drive, or wide‑supply scenarios. However, the minor compromise in high‑speed performance should be noted.
Analysis ID: 5539-AD99000
Based on part parameters and for reference only. Not to be used for procurement or production.
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