Original Part
Alternative Part
1. ADT75ARZ-REEL7 Substitution Conclusion
The ADT75ARZ-REEL7 can serve as a substitute under limited conditions, but several key differences must be noted: First, its supply voltage range is 2.7 V to 5.5 V, which is narrower than the original part’s 1.7 V–5.5 V range, making it unsuitable for low‑voltage systems such as 1.8 V rails. Second, its accuracy is ±2 °C over –25 °C to 100 °C, compared with the original’s ±1 °C over 0 °C–85 °C; this may affect performance in applications with tight temperature‑control requirements. Third, although its resolution is improved to 12‑bit, it lacks the “programmable resolution” feature, reducing flexibility. If the application operates above 2.7 V and can tolerate a slightly relaxed accuracy specification, this device can be substituted based on the same package and I²C communication interface.
2. MCP9803-M/SN Substitution Conclusion
The MCP9803-M/SN is a highly viable alternative, as its core parameters closely match those of the original part: both offer ±1 °C accuracy (within their respective test conditions), support programmable resolution, alarm output, and shutdown mode, and have identical temperature ranges. The main differences are the supply voltage (2.7 V–5.5 V), which is slightly higher than the original’s 1.7 V–5.5 V and therefore cannot cover ultra‑low‑voltage 1.8 V applications, and the accuracy test condition (–10 °C to 85 °C vs. 0 °C–85 °C for the original), though overall performance remains similar. Within the allowable voltage range, this device can be directly substituted, particularly in scenarios requiring same‑brand replacement and high functional compatibility.
Analysis ID: 1C99-4669000
Based on part parameters and for reference only. Not to be used for procurement or production.
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