2.5V series reference, SOT-23-5
The LM4120IM5-2.5/NOPB: It operates from a 2V to 12V input supply and sources up to 5 mA of output current, with a quiescent supply current of 275 µA.
Noise floor and precision signal chains
The series reference topology means the output is buffered internally — the load current does not flow through the bandgap core, so the output voltage stays stable under varying load conditions, unlike a shunt reference where the bias current must be set externally.
For new designs, this part is a straightforward fit where a 2.5V series reference with ±0.5% accuracy and low noise is required in a small SOT-23 footprint.