Original Part
Alternative Part
1. ADG201AKRZ-REEL Substitution Conclusion
Direct substitution is not recommended. The ADG201AKRZ-REEL exhibits significant deviations from the original part in key performance parameters. Its primary disadvantages include an excessively high on-resistance (90Ω vs. 50Ω) and poor channel matching (4.5Ω vs. 1.5Ω), which would introduce greater signal attenuation and inter-channel error, making it unsuitable for precision signal paths. Its switching speed is extremely slow (Ton 300ns vs. 60ns), failing to meet the requirements of high-speed switching applications. Furthermore, its high charge injection (20pC vs. -5pC) will generate greater voltage error in scenarios such as sample-and-hold circuits. Additionally, its single-supply operating range (10-15V) is considerably narrower than that of the original part (13-36V), limiting system design flexibility. This part is only suitable for low-frequency, non-precision applications where signal integrity, speed, and power supply adaptability are not critical.
2. ADG201HSKRZ-REEL Substitution Conclusion
This part can serve as a high-performance substitute, provided its supply voltage range is met, though the impact on dynamic performance must be evaluated. Its core specifications—on-resistance (50Ω) and channel matching (1.5Ω)—are identical to the original part, resulting in comparable static performance. It also features faster switching speed (50ns). The primary differences are: its single-supply operating range (10.8-16.5V) is narrower than the original part's (13-36V) and cannot cover the original's higher voltage applications; its charge injection (10pC) is significantly greater than the original's (-5pC), causing larger voltage disturbance on high-impedance nodes during switching; and its off-capacitance (10pF) is higher, which can affect bandwidth and isolation for high-frequency signals. If the system supply voltage falls within 10.8-16.5V and can tolerate the higher charge injection and capacitive load, this part is a viable performance substitute.
Analysis ID: 93C2-E6B9000
Based on part parameters and for reference only. Not to be used for procurement or production.
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