Original Part
Alternative Part
Shunt Voltage Reference IC Adjustable 2.5V 36 VV ±0.25% 100 mA TO-92-3
1. FAN431AZXA Substitution Conclusion
The FAN431AZXA is compatible in core functionality and package with the original part, making it a viable conditional substitute for cost reduction or improved supply security. However, it exhibits a clear degradation in key performance parameters. The differences lie in its initial accuracy (±1% vs. ±0.4%) and typical temperature coefficient (50ppm/°C vs. 20ppm/°C). In applications requiring high absolute accuracy or high stability over a wide temperature range, a direct substitution may degrade system accuracy and temperature drift performance. Therefore, it is only suitable for applications with relaxed requirements for reference voltage accuracy and temperature stability.
2. TL1431ACZ-AP Substitution Conclusion
The TL1431ACZ-AP is also largely compatible in function and package, representing a substitute with a performance trade-off. Its advantages include higher initial accuracy (±0.25%) and a lower cathode operating current (600µA), enabling a more precise reference voltage and contributing to lower system standby power consumption. However, its temperature coefficient is significantly higher (90ppm/°C vs. 20ppm/°C), meaning the device's output voltage exhibits greater variation with ambient temperature. In applications with stringent temperature stability requirements, a direct substitution may introduce unacceptable temperature drift error. Therefore, the impact of temperature drift on system performance must be thoroughly evaluated prior to substitution.
Analysis ID: 316E-07CC000
Based on part parameters and for reference only. Not to be used for procurement or production.
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