Original Part
Alternative Part
1. AD8606ARZ Substitution Conclusion
The AD8606ARZ can serve as a conditional replacement for the TS1872AIDT, primarily in applications requiring higher input bias current performance and precision, though voltage compatibility must be considered. Both are dual-channel rail-to-rail output op-amps with compatible packages. However, the AD8606ARZ utilizes CMOS technology, offering a significantly lower input bias current (1 pA) compared to the original part’s 70 nA, making it suitable for high-impedance sensor signal conditioning. It also provides higher gain bandwidth product (10 MHz) and slew rate (5 V/µs), delivering superior dynamic performance. The AD8606ARZ has a narrower supply range (2.7 V to 5.5 V) than the TS1872AIDT (1.8 V to 6 V) and cannot support applications below 2.7 V. Its quiescent current (1 mA per dual channel) is slightly higher, which should be evaluated in power-sensitive designs. If the system operates above 2.7 V and does not require the 1.8 V capability of the TS1872AIDT, the AD8606ARZ offers advantages in precision and speed.
2. AD8652ARZ-REEL Substitution Conclusion
The AD8652ARZ-REEL is an indirect replacement for the TS1872AIDT and is only suitable for specific high-speed applications, provided that power consumption and drive capability compatibility are addressed. Although it shares the same package and is also a CMOS rail-to-rail op-amp, the AD8652ARZ-REEL offers a significantly higher gain bandwidth product (50 MHz) and slew rate (41 V/µs), making it appropriate for high-speed signal processing. However, its quiescent current is substantially higher at 17.5 mA (total), more than 17 times that of the TS1872AIDT (1 mA), which increases power dissipation and may impact thermal design and battery life. Additionally, its output current (40 mA per channel) is only half that of the original part (80 mA), reducing drive capability. The supply range (2.7 V to 5.5 V) also does not cover the 1.8 V low-voltage operation of the TS1872AIDT. Substitution should only be considered if the system demands high-speed performance, can tolerate higher power consumption, and operates above 2.7 V; otherwise, it is not recommended.
Analysis ID: F38B-C7FB000
Based on part parameters and for reference only. Not to be used for procurement or production.
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