Original Part
Alternative Part
Shunt Voltage Reference IC Adjustable 2.5V 36 VV ±0.4% 100 mA SOT-23-3
1. AZ431AN-ATRG1 Substitution Conclusion
The AZ431AN-ATRG1 can serve as a substitute for the original part and typically offers a performance upgrade. Key differences include a superior output voltage tolerance (±0.4% vs. ±1%) and a lower typical temperature coefficient (20ppm/°C vs. 50ppm/°C), resulting in significantly better output voltage accuracy and stability over a wider temperature range. It is important to note that its nominal output voltage is 2.5V, which presents a slight 5mV deviation from the original part's 2.495V. While this difference is generally masked by the part's higher precision in the vast majority of applications, circuits with stringent calibration requirements for the absolute reference voltage value must evaluate the acceptability of this offset.
2. LM431SCCM3X Substitution Conclusion
The LM431SCCM3X is a direct and ideal drop-in replacement, representing a performance-enhanced version from the same manufacturer. The improvement lies in its tighter output voltage tolerance (±0.5% vs. ±1%), providing higher initial accuracy at room temperature. Its output voltage (2.495V) and typical temperature coefficient (50ppm/°C) remain identical to the original part. This combination ensures the highest degree of electrical parameter compatibility, eliminating the need to reassess the impact of the reference voltage value on downstream circuitry. It can be directly substituted to achieve better accuracy.
Analysis ID: 905F-F680000
Based on part parameters and for reference only. Not to be used for procurement or production.
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