Original Part
Shunt Voltage Reference IC Adjustable 2.495V 36 VV ±0.5% 100 mA TO-92-3
Alternative Part
1. AS431IAZTR-G1 Substitution Conclusion
As a direct replacement, the AS431IAZTR-G1 is a viable and performance-enhanced option for most applications. The key differences are as follows: Its cathode current is significantly reduced to 50µA (compared to 700µA for the Original Part). This substantially lowers the minimum operating current required for the device to start up and maintain a stable reference voltage. This characteristic is particularly beneficial for battery-powered or low-power system designs, effectively reducing system standby power consumption and relaxing the requirements for the preceding power supply stage. Furthermore, while its nominal reference voltage is specified at 2.5V (slightly different from the Original Part's 2.495V nominal value), both fall within a ±0.5% accuracy band, rendering them electrically equivalent in practice. The package is fully compatible, and core parameters such as the adjustable voltage range (up to 36V) and output current capability (100mA) remain identical.
2. AZ431AZ-ATRE1 Substitution Conclusion
As a direct replacement, the AZ431AZ-ATRE1 is an excellent choice for high-performance applications, though its power consumption requirements warrant attention. The primary differences are: Its accuracy is improved to ±0.4% (compared to ±0.5% for the Original Part), and it provides a specified typical temperature coefficient (20ppm/°C). This results in smaller output voltage drift over the entire operating temperature range, delivering a higher-precision and more stable reference voltage. It is well-suited for circuits with more stringent demands on voltage accuracy and temperature stability. However, its cathode current is notably higher at 1mA (compared to 700µA for the Original Part), increasing the device's own operating power dissipation and imposing slightly higher demands on the drive capability of the supply circuit. This may render it less advantageous in applications where ultra-low power consumption is paramount. The package and core voltage/current parameters remain fully compatible.
Analysis ID: 157F-FD55000
Based on part parameters and for reference only. Not to be used for procurement or production.
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