Original Part
Alternative Part
Shunt Voltage Reference IC Adjustable 2.5V 36 VV ±0.4% 100 mA SOT-23-3
Shunt Voltage Reference IC Adjustable 2.5V 36 VV ±0.4% 100 mA SOT-23-3
1. AZ431AN-ATRE1 Substitution Conclusion
This device can serve as a functional replacement, but the impact of key parameter differences on the design must be considered. Its primary technical advantages are a superior reference voltage tolerance (±0.4% vs. ±1%) and a specified typical temperature coefficient (20ppm/°C), suggesting potentially better performance in terms of accuracy and temperature stability compared to the original part. However, its cathode operating current is significantly higher (1 mA vs. 80 µA). Under identical operating conditions, this leads to increased power dissipation in the reference element itself. Furthermore, the resistor divider network used to set the reference voltage must be recalculated. Direct substitution without adjusting the peripheral circuitry may result in higher system power consumption or a deviation of the reference voltage from the intended setpoint.
2. AZ431AN-ATRG1 Substitution Conclusion
The substitution conclusion for this device is identical to that for the AZ431AN-ATRE1. This is because their core part number (AZ431AN-ATR) is the same, with only the suffix packaging code differing (E1 vs. G1). Such suffixes typically denote non-electrical characteristics like reel orientation or quantity. Consequently, their primary electrical parameters, performance trade-offs, and design considerations are exactly the same: they offer higher accuracy and temperature stability, but also present the critical challenge of significantly increased cathode operating current (1 mA vs. 80 µA). This necessitates a redesign of the external biasing circuit to manage the resulting higher power dissipation.
Analysis ID: D498-3EBB000
Based on part parameters and for reference only. Not to be used for procurement or production.
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