Original Part
Alternative Part
1. ADT75ARZ-REEL7 Substitution Conclusion
The feasibility of a direct replacement is conditionally acceptable. The primary deviation lies in its narrower supply voltage range (2.7V to 5.5V) compared to the original part (1.7V to 5.5V). This precludes its use in any system operating below 2.7V (e.g., common 1.8V or 2.5V rails), which is the most critical compatibility constraint. The advantage is its higher resolution (12-bit vs. 11-bit), providing finer digital readouts over the same temperature range. This represents an improvement for applications requiring greater sensitivity to temperature variations. Accuracy and core functionality (one-shot conversion, programmable limits) remain essentially consistent with the original.
2. MCP9803-M/SN Substitution Conclusion
The feasibility of a direct replacement is also conditionally acceptable. A key difference from the original part is its minimum operating voltage of 2.7V, meaning it cannot support the low-voltage applications (1.7V to 2.7V) covered by the original. Its notable advantage is a higher specified accuracy (±1°C) under more favorable test conditions (-10°C to 85°C), enabling more precise measurements within the core operating temperature range. Functionally, it fully covers the original (including programmable resolution) and adds a shutdown mode, which aids in further reducing system power consumption. It should be noted, however, that its specified accuracy over the full temperature range (±3°C) is identical to the original.
Analysis ID: 26BC-DF49000
Based on part parameters and for reference only. Not to be used for procurement or production.
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