Original Part
Alternative Part
1. AD712KRZ Substitution Conclusion
The AD712KRZ can serve as a conditional substitute for the OPA2107AU, with key differences requiring attention. The AD712KRZ is a JFET-input op-amp with an input bias current (25 pA) slightly higher than that of the OPA2107 (4 pA), yet it remains within the low‑power precision category and is suitable for high‑impedance sensor applications. However, its input offset voltage (300 µV) is three times that of the OPA2107 (100 µV), which may affect systems with stringent DC accuracy requirements. Both devices offer comparable bandwidth (4 MHz vs. 4.5 MHz) and slew rate (20 V/µs vs. 18 V/µs), share the same supply range (9 V to 36 V), and are package‑compatible. When substituting, the impact of offset voltage on system error must be evaluated; recalibration may be necessary in high‑gain or precision measurement circuits.
2. MC33072ADR2G Substitution Conclusion
The MC33072ADR2G is not suitable for direct substitution of the OPA2107AU due to significant differences in key parameters. The input bias current of the MC33072 (100 nA) is four orders of magnitude higher than that of the OPA2107 (4 pA), introducing substantial input error in high‑impedance signal‑source applications. Its input offset voltage (500 µV) is also higher, resulting in poorer DC accuracy. Although the MC33072 offers a wider supply range (3 V to 44 V) and lower power consumption, its bandwidth (4.5 MHz) is identical while its slew rate (13 V/µs) is somewhat lower. Unless the application is insensitive to input current—such as audio filtering or general signal conditioning—it is not recommended for precision or high‑impedance front‑end circuits.
Analysis ID: 2978-F155000
Based on part parameters and for reference only. Not to be used for procurement or production.
SkyChip © 2026, Email: sales@skychip.com