1.225V fixed shunt reference in SC-70-5
The LM4041EIM7X-1.2 is a precision shunt voltage reference from Texas Instruments, delivering a fixed 1.225V output with ±2% initial tolerance.
12 mA output, 65 µA cathode current — load and bias budget
The device can source up to 12 mA through the shunt path, which sets the maximum load current the reference can support while maintaining regulation. The cathode current is 65 µA, representing the minimum bias current needed to keep the reference in its operating region — important for power-constrained designs where every microamp counts.
150 ppm/°C drift and 20 µVrms noise
Noise from 10 Hz to 10 kHz is 20 µVrms, low enough for most 12-bit ADC references but worth checking if the design targets 16-bit or higher resolution without additional filtering.
For new designs or volume production, the LM4041AIM7-1.2 (same fixed 1.225V, tighter ±0.1% tolerance, same SC-70-5 footprint) is a common cross-shop candidate — confirm the tolerance grade matches your BOM before substituting.