Enhanced Product 2.5-V Precision Micropower Shunt Voltage Reference, 0.5% accuracy



Product details


VO (V) 2.5 Reference voltage Fixed Initial accuracy (Max) (%) 0.5 Rating HiRel Enhanced Product VO adj (Min) (V) 2.5 VO adj (Max) (V) 2.5 Iz for regulation (Min) (uA) 45 Temp coeff (Max) (ppm/ degree C) 100 Operating temperature range (C) -55 to 125 Iout/Iz (Max) (mA) 15 open-in-new Find other Shunt voltage references

Package | Pins | Size

SOT-23 (DBZ) 3 7 mm² 2.92 x 2.37 open-in-new Find other Shunt voltage references


  • Fixed Output Voltage of 2.5 V
  • Tight Output Tolerances and Low Temperature Coefficient
    • Max 0.65%, 100 ppm/°C
  • Low Output Noise: 35 µVRMS Typ
  • Wide Operating Current Range: 45 µA Typ to 15 mA
  • Stable With All Capacitive Loads; No Output Capacitor Required
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The LM4040 series of shunt voltage references are versatile, easy-to-use references that cater to a vast array of applications. The 2-pin fixed-output device requires no external capacitors for operation and is stable with all capacitive loads. Additionally, the reference offers low dynamic impedance, low noise, and low temperature coefficient to ensure a stable output voltage over a wide range of operating currents and temperatures. The LM4040 uses fuse and Zener-zap reverse breakdown voltage trim during wafer sort to offer an output voltage tolerance of 0.65%.

Packaged in a space-saving SOT-23-3 package and requiring a minimum current of 45 µA (typ), the LM4040 also is ideal for portable applications. The LM4040C25 is characterized for operation over an ambient temperature range of –55°C to 125°C.

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Technical documentation

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Type Title Date
* Datasheet LM4040-EP Precision Micropower Shunt Voltage Reference . datasheet (Rev. A) Sep. 15, 2011
White papers Voltage Supervisor and Reset ICs: Tips, Tricks and Basics Jun. 28, 2019
VID LM4040C25-EP VID V6211615 Jun. 21, 2016
Radiation & Reliability reports LM4040C25MDBZTEP Reliability Report Sep. 05, 2013

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SOT-23 (DBZ) 3 View options

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