LM4040 Datasheet Precision micropower shunt voltage reference Features Fixed 2.048 V, 2.5 V, 3.0 V, 4.096 V and 5.0 V output voltages Ultra low operating current: 10 A at 25 C High precision 25 C: +/- 0.1% (LM4040A), +/- 0.2% (LM4040B), +/- 0.5 % (LM4040C), +/- 1% (LM4040D) SOT23-3L SOT323-5L Very low LF noise: typ.10 Vp-p Stable when used with capacitive loads Industrial (-40 to +125 C) temperature range 70 ppm/C max. temperature coefficient Available in SOT23-3L and SOT323-5L packages Maturity status link Applications LM4040 Portable, battery-operated equipment Data acquisition systems Instrumentation Description The LM4040 is a low power and high accuracy shunt voltage reference providing a stable output voltage over the industrial temperature range (-40 to +125 C), with a maximum temperature coefficient of 70 ppm/C. It is available in 0.1%, 0.2%, 0.5% and 1% initial accuracy versions. The SOT323-5L and SOT23-3L packages can be designed in applications where space saving is a critical issue. The very low operating current is a key advantage for power restricted designs. The LM4040 is very stable and can be used in a broad range of application conditions. DS13886 - Rev 1 - January 2022 www.st.com For further information contact your local STMicroelectronics sales office.LM4040 Pin configuration 1 Pin configuration Figure 1. Pin configuration SOT23-3L, SOT323-5L (top view) Cathode 1 Anode 1 5 NC K A NC NC 2 3 A K Anode 4 NC 2 Cathode 3 SOT23-3L SOT323-5L Note: The NC pin must be left unconnected or connected to anode. DS13886 - Rev 1 page 2/22