Product details


Reference voltage Adjustable Initial accuracy (Max) (%) 0.4 Rating HiRel Enhanced Product VO adj (Min) (V) 2.5 VO adj (Max) (V) 36 Iz for regulation (Min) (uA) 450 Temp coeff (Max) (ppm/ degree C) 114 Operating temperature range (C) -40 to 125, -55 to 125 Iout/Iz (Max) (mA) 100 open-in-new Find other Shunt voltage references

Package | Pins | Size

SOIC (D) 8 19 mm² 3.91 x 4.9 open-in-new Find other Shunt voltage references


  • 0.4% Initial Voltage Tolerance
  • 0.2-Ω Typical Output Impedance
  • Fast Turnon: 500 ns
  • Sink Current Capability: 1 to 100 mA
  • Low Reference Current (REF)
  • Adjustable Output Voltage: VI(ref) to 36 V
  • Supports Defense, Aerospace, and Medical Applications
    • Controlled Baseline
    • One Assembly and Test Site
    • One Fabrication Site
    • Available in Military (–55°C to 125°C)
      Temperature Range
    • Extended Product Life Cycle
    • Extended Product-Change Notification
    • Product Traceability
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The TL1431-EP device is a precision-programmable reference with specified thermal stability over the military temperature range. The output voltage can be set to any value from VI(ref) (approximately 2.5 V) to 36 V with two external resistors (see ). This device has a typical output impedance of 0.2 Ω. Active output circuitry provides a very sharp turnon characteristic, making the device an excellent replacement for Zener diodes and other types of references in applications such as onboard regulation, adjustable power supplies, and switching power supplies.

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Technical documentation

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Type Title Date
* Datasheet TL1431-EP Precision-Programmable Reference datasheet (Rev. D) Jan. 02, 2015
More literature Voltage Supervisor and Reset ICs: Tips, Tricks and Basics Jun. 28, 2019
Selection guides TI Components for Aerospace and Defense Guide (Rev. E) Mar. 22, 2017
VID TL1431-EP VID V6204756 Jun. 21, 2016
Radiation & Reliability reports TL1431MDREP Reliability Report Aug. 26, 2011

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Voltage Reference Use Cases

Beyond the scope of signal chain conditioning, see other voltage reference use cases in this informative video.

Posted: 07-Jan-2018
Duration: 05:53

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