Precision 2.5V shunt reference — now obsolete
The Texas Instruments LM4040CIM7-2.5/NOPB is a precision shunt voltage reference delivering a fixed 2.5V output with ±0.5% initial tolerance. The 35µVrms noise over 10Hz to 10kHz and 100ppm/°C temperature coefficient make it suitable for precision analog chains in industrial control and instrumentation where a stable reference voltage is needed.
No official successor or last-time-buy window is recorded.
Parametric profile for BOM fit
As a shunt reference, the LM4040CIM7-2.5/NOPB requires a cathode resistor to set the bias current; the minimum cathode current is 65 µA and the output can sink up to 15 mA. The SC-70-5 (SOT-353) package occupies minimal board area, but the small footprint makes manual rework or hot-air removal more delicate than a larger SOT-23.