Original Part
Alternative Part
Shunt Voltage Reference IC Adjustable 2.5V 36 VV ±1% 100 mA SOT-23-3
Shunt Voltage Reference IC Adjustable 2.5V 36 VV ±0.4% 100 mA SOT-23-3
1. AS431IBNTR-G1 Substitution Conclusion
Direct substitution is not recommended, or should be applied with caution in applications where long-term temperature drift stability is critical. The key differences lie in its unspecified temperature coefficient and a typical cathode operating current (Ika) of only 50µA, which is significantly lower than the original part’s 1mA. A device with an undefined temperature coefficient may exhibit greater output voltage drift across temperature compared to the original, affecting system accuracy and stability over the full operating temperature range. While the lower cathode current can benefit low-power designs, it may cause the device to operate outside the optimal region in circuits originally biased for 1mA, potentially degrading dynamic response and noise performance relative to design expectations.
2. AZ431AN-ATRG1 Substitution Conclusion
Substitution is recommended and considered a performance upgrade. The device offers improved initial accuracy (±0.4%) and a lower temperature coefficient (20ppm/°C) compared to the original part (±1%, 50ppm/°C). The tighter reference voltage tolerance brings the output closer to the nominal value, enhancing initial accuracy in measurement or control systems. The lower temperature coefficient reduces output voltage variation over temperature, significantly improving system stability and consistency across the full operating range. All other key parameters—including output voltage range, cathode current, and package—remain fully compatible.
Analysis ID: 1EBA-A8CB000
Based on part parameters and for reference only. Not to be used for procurement or production.
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