Original Part
Alternative Part
1. AD8602ARZ-REEL Substitution Conclusion
The substitution is conditionally acceptable, limited to non-automotive applications where the supply voltage exceeds 2.7V and high output drive current is not required. Compared to the original part, the key differences are as follows: First, it offers significantly lower input bias current (0.2pA vs. 70nA) and superior input offset voltage (80μV vs. 1mV), providing a distinct advantage in circuits with high-impedance signal sources or those demanding high DC precision. Second, it features higher bandwidth and slew rate (GBW: 8.4MHz vs. 1.8MHz; SR: 6V/µs vs. 0.6V/µs), enabling it to handle higher frequency and faster transient signals. Third, it has a higher minimum operating voltage (2.7V vs. 1.8V) and lacks AEC-Q100 qualification, making it unsuitable for low-voltage systems operating between 1.8V and 2.7V or any automotive-grade applications. Fourth, its output drive capability is weaker (50mA vs. 80mA), resulting in slightly inferior performance when driving heavy loads.
2. AD8602DRZ-REEL Substitution Conclusion
Substitution is generally not recommended. In addition to sharing all the limitations of the AD8602ARZ-REEL regarding voltage range, qualification, and drive current, its most critical drawback is a significantly worse input offset voltage (1.3mV vs. 1mV). This degrades its DC accuracy and initial error compared to the original TS1872, negating the core precision advantage typically expected from a CMOS op-amp. This variant offers no performance upgrades while introducing compatibility issues related to supply voltage and qualification requirements, resulting in very low substitution value.
Analysis ID: ED7F-E46A000
Based on part parameters and for reference only. Not to be used for procurement or production.
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