Original Part
Alternative Part
1. AD746JRZ Substitution Conclusion
This component can serve as a substitute under specific conditions, though critical differences must be considered. The AD746JRZ and the TLE2082ACD are both J‑FET dual op‑amps with compatible packages. The AD746JRZ offers higher bandwidth (13 MHz vs. 10 MHz) and slew rate (75 V/µs vs. 40 V/µs), making it advantageous for high‑speed signal processing. However, its input bias current (110 pA) is approximately 5.5 times that of the original part (20 pA), which may introduce greater error in high‑impedance sensor or precision integrator circuits. Additionally, its supply voltage range is narrower (9 V to 36 V vs. 4.5 V to 38 V), limiting its use in low‑voltage or wide‑supply applications. Substitution is not viable if the circuit is extremely sensitive to input current or requires a supply below 9 V; otherwise, it can be compatible in general medium‑to‑high‑speed applications.
2. LT1355CS8TRPBF Substitution Conclusion
Direct substitution carries high risk and is only feasible in limited scenarios. The LT1355CS8TRPBF is a voltage‑feedback op‑amp, whereas the original part is J‑FET based—this fundamental difference may require adjustments to the feedback network, such as phase compensation. Its slew rate (400 V/µs) far exceeds that of the original part, making it suitable for very‑high‑speed signal processing. However, its input bias current (80 nA) is roughly 4000 times higher than the original (20 pA), rendering it completely unsuitable for high‑impedance or precision DC applications such as photodetection or charge amplification. The supply range (5 V to 30 V) is slightly narrower, but its lower quiescent current benefits low‑power designs. Substitution should only be considered when the circuit is insensitive to input current and demands very high slew rate, and stability must be re‑evaluated.
Analysis ID: ADD0-721D000
Based on part parameters and for reference only. Not to be used for procurement or production.
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