The recommended operating temperature range for LM431ACZ/LFT4 is -40°C to 125°C. However, it's essential to note that the device's accuracy and stability may degrade at extreme temperatures.
To ensure proper biasing, connect the cathode (K) to a voltage source, and the anode (A) to a resistive divider network. The recommended bias current is between 1 mA and 100 mA. Additionally, ensure the voltage across the device is within the recommended range of 2.5 V to 36 V.
The internal Zener diode in the LM431ACZ/LFT4 provides a stable voltage reference point, which is used to regulate the output voltage. This Zener diode is temperature-compensated to ensure a stable voltage reference across the operating temperature range.
Yes, the LM431ACZ/LFT4 can be used as a voltage regulator. However, it's essential to note that it's a shunt regulator, not a series regulator. This means it regulates the voltage by shunting excess current to ground, rather than by controlling the output voltage directly.
The output voltage of the LM431ACZ/LFT4 can be calculated using the formula: Vout = Vref * (1 + R1/R2), where Vref is the internal reference voltage (2.495 V), R1 is the resistance between the anode and the cathode, and R2 is the resistance between the cathode and ground.
LM431ACZ/LFT4 datasheet
by Texas Instruments
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