1. AD8005ARZ-REEL Substitution Conclusion Direct substitution is not feasible and is only applicable in specific scenarios requiring high speed, low power consumption, and extremely low DC accuracy. Key differences are as follows: The AD8005 is a current‑feedback amplifier whose bandwidth depends on the feedback resistor, differing fundamentally from the voltage‑feedback operation of the original part. This necessitates a complete recalculation and adjustment of the circuit design, especially the feedback network. Its input offset voltage (5 mV) is two orders of magnitude higher than that of the LT1722 (100 µV), making it unsuitable for any precision amplification or sensor signal conditioning. Its output current capability (10 mA) is only one‑fifth that of the original device (50 mA), resulting in significantly insufficient drive for heavy loads. While the AD8005 offers superior slew rate (280 V/µs) and bandwidth (270 MHz) along with very low quiescent power, substitution may be considered only in applications with stringent speed requirements, AC‑coupled signals, and very light loads—such as certain video buffers or high‑speed signal distribution. Even then, a thorough reevaluation of circuit performance is mandatory.