The recommended operating temperature range for LM431ACM 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 stability and prevent oscillation, it's crucial to follow proper PCB layout practices, such as keeping the input and output traces short and separate, using a low-ESR capacitor, and minimizing parasitic inductance and capacitance.
The minimum input voltage for LM431ACM is 2.5V, and the maximum input voltage is 36V. Operating the device outside this range may affect its performance and accuracy.
While LM431ACM can be used as a voltage reference, it's not suitable for high-current applications due to its limited output current capability (typically 10mA). For high-current applications, consider using a dedicated voltage regulator or a more robust voltage reference device.
The output voltage of LM431ACM can be calculated using the formula: Vout = 2.5V x (1 + R1/R2), where R1 and R2 are the resistors connected between the output and the adjust pin. The output voltage can be adjusted by varying the ratio of R1 and R2.
LM431ACM datasheet
by Texas Instruments
