The LM4040DEM3-2.0 is a fixed 2.048V shunt voltage reference from Texas Instruments in a SOT-23-3 package. It delivers a ±1% initial tolerance and 35µVrms noise over a 10Hz to 10kHz bandwidth — specs that suit it for ADC reference, comparator threshold, and sensor excitation in industrial and automotive environments.
NRND status — plan your replacement now
73 µA cathode current — why it matters for always-on circuits
The 73 µA cathode current is the minimum current needed to maintain regulation. In battery-powered or energy-harvesting designs, every microamp counts — this part draws less than many competing shunt references, leaving more headroom for the load. The 15 mA maximum output current sets the upper limit for driving external loads or multiple ADC inputs.
That is adequate for 12-bit systems and many 10-bit applications, but for 16-bit precision across temperature you will want a tighter TC — look at the LM4040A or LM4050 series with 50 ppm/°C or better.
Sourcing this NRND part
Because the LM4040DEM3-2.0 is NRND, standard distributor stock may be limited.