1. ADG201AKRZ-REEL7 Substitution Conclusion Based on a comparison of key technical parameters, the ADG201AKRZ-REEL7 cannot serve as a direct replacement for the DG201HSDY-T1-E3. While the two devices are compatible in package and basic functionality, they exhibit significant differences in critical performance specifications. These differences may lead to degraded system performance or operational failure. The core discrepancies are as follows: The on-resistance of the ADG201 (90Ω) is substantially higher than that of the original part (50Ω), which will increase signal path voltage drop and distortion. Its switching speed (300ns/250ns) is approximately five times slower than the original's (60ns/50ns), making it unsuitable for high-speed switching applications. Furthermore, its supply voltage range (single supply 10-15V) is much narrower than the original part's (13-36V), limiting its use in higher voltage scenarios. Additionally, the ADG201 demonstrates inferior performance in channel matching accuracy (4.5Ω vs. 1.5Ω) and charge injection (20pC vs. -5pC). This results in poorer inter-channel consistency and introduces more disruptive charge into the signal path during switching transitions, compromising the integrity of high-precision analog signals. Direct substitution is not recommended unless the application is insensitive to on-resistance, switching speed, voltage range, and precision.