Original Part
Alternative Part
Shunt Voltage Reference IC Adjustable 2.5V 36 VV ±0.8% 100 mA SOT-23-3
Shunt Voltage Reference IC Adjustable 2.495V 36 VV ±1% 100 mA SOT-23-3
1. AZ431BN-ATRE1 Substitution Conclusion
The AZ431BN-ATRE1 can serve as a direct replacement for the TL432AQDBZR, though key parameter differences must be evaluated. Its primary advantages are higher reference voltage accuracy (±0.8% vs ±1%) and a specified temperature drift coefficient (20ppm/°C), which contribute to improved long-term system stability. However, its cathode operating current is significantly higher (1mA vs 80µA). To maintain the same output voltage, the divider resistor values must be reduced, which may increase quiescent power dissipation and affect the design margin of the original current-setting circuitry. If the circuit can tolerate the higher cathode current and requires improved accuracy, direct substitution is feasible.
2. AS431HBNTR-G1 Substitution Conclusion
The AS431HBNTR-G1 is highly compatible with the original part in basic parameters, but subtle differences should be noted. Its accuracy and temperature drift (±1%, 20ppm/°C) are similar to those of the AZ431BN-ATRE1, but its cathode current (500µA) and quiescent current (4µA) fall between the original device and the AZ431, resulting in a more moderate impact on power consumption. Note that its minimum output voltage is specified as 2.495V (matching the original part), while the AZ431 is specified at 2.5V—a negligible difference in practice. For designs sensitive to power dissipation while still requiring balanced accuracy, this part represents a more robust alternative, though thermal performance and feedback stability should still be verified in the actual application circuit.
Analysis ID: E7BC-95BF000
Based on part parameters and for reference only. Not to be used for procurement or production.
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