Original Part
Alternative Part
Shunt Voltage Reference IC Adjustable 2.5V 36 VV ±0.5% 100 mA SOT-23-3
Shunt Voltage Reference IC Adjustable 2.5V 36 VV ±0.5% 100 mA SOT-23-3
1. AS431ANTR-E1 Substitution Conclusion
The AS431ANTR-E1 is a highly viable direct replacement. The differences are as follows: the nominal reference voltage shifts from 2.495V to 2.5V (still within the ±0.5% tolerance), and the temperature coefficient (TC) is significantly improved from a typical 50ppm/°C to a typical 20ppm/°C. In the vast majority of circuits designed for a 2.5V target, the slight nominal voltage difference is typically absorbed by the system's tolerance budget. The superior temperature coefficient directly enhances the output voltage accuracy and long-term stability of the device across the full operating temperature range, representing a performance upgrade. All other key parameters, including output voltage range, maximum cathode current, package, and minimum cathode operating current, remain identical, achieving full pin-to-pin and functional compatibility.
2. AS431IANTR-G1 Substitution Conclusion
The feasibility of substituting with the AS431IANTR-G1 requires evaluation based on the specific application. Two significant technical differences are notable: first, the temperature coefficient (TC) is not explicitly specified in the provided parameters, implying its temperature stability may not match that of the original part (50ppm/°C typical). This necessitates careful review of the detailed datasheet for wide-temperature or high-precision applications. Second, the cathode operating current is drastically reduced from 1mA to 50µA. This is a significant advantage in battery-powered or energy-saving applications requiring extremely low quiescent current, as it can markedly reduce system standby power consumption. However, in low-frequency circuits that rely on a certain bias current for fast dynamic response or optimal noise performance, the lower cathode current may alter the operating characteristics. All other parameters, such as voltage range, tolerance, and package, remain consistent.
Analysis ID: 93A4-2995000
Based on part parameters and for reference only. Not to be used for procurement or production.
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