The typical output impedance of the LM4120 is around 0.2 ohms, which is relatively low and makes it suitable for applications where a stable voltage reference is required.
When the input voltage is below the minimum recommended value of 4.5V, the LM4120 may not function properly and the output voltage may not be regulated. It's recommended to ensure that the input voltage is within the specified range for proper operation.
The LM4120 is rated for operation up to 125°C, but its accuracy and stability may degrade at higher temperatures. It's recommended to consult the datasheet and application notes for guidance on using the LM4120 in high-temperature applications.
The LM4120 has a built-in noise reduction circuit that helps to filter out input voltage noise and ripple. However, it's still recommended to use a suitable input capacitor to further reduce noise and ensure stable operation.
While the LM4120 can provide a stable voltage reference, it's not designed to be used as a voltage regulator. It does not have the current drive capability or protection features required for a voltage regulator. Instead, it's intended for use as a precision voltage reference in applications such as analog-to-digital converters, digital-to-analog converters, and other precision circuits.
LM4120AIM5X-1.8/NOPB datasheet
by Texas Instruments
