Original Part
Alternative Part
1. AD8620ARZ-REEL Substitution Conclusion
The AD8620ARZ-REEL may be a viable substitute in applications where the supply voltage does not exceed 26 V, as it offers improved performance specifications: a higher slew rate (60 V/µs vs. 18 V/µs) enables faster signal response, a wider gain bandwidth product (25 MHz vs. 4.5 MHz) supports broader frequency handling, and slightly better input bias current (3 pA vs. 4 pA) and input offset voltage (85 µV vs. 100 µV), contributing to enhanced accuracy. Its narrower supply voltage range (10 V to 26 V vs. 9 V to 36 V) may limit use in higher‑voltage environments. Additionally, its J‑FET amplifier architecture differs from the original standard type in terms of input impedance characteristics; circuit compatibility should be evaluated, especially in high‑impedance or precision applications.
2. AD712KRZ Substitution Conclusion
The AD712KRZ fully matches the original part in supply voltage range (9 V to 36 V), and its slew rate (20 V/µs vs. 18 V/µs) is similar, ensuring comparable transient response. Key differences include: higher input bias current (25 pA vs. 4 pA), which may introduce greater input error and affect accuracy in high‑impedance circuits; higher input offset voltage (300 µV vs. 100 µV), resulting in poorer DC accuracy and potentially requiring additional calibration; and lower output current (25 mA vs. 40 mA), which could limit drive capability. Its –3 dB bandwidth is 4 MHz, close to the original part’s gain bandwidth product (4.5 MHz), but overall performance is more general‑purpose. Substitution should be weighed against precision and drive requirements.
Analysis ID: 913E-AF72000
Based on part parameters and for reference only. Not to be used for procurement or production.
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