Product details


VO (V) 1.25 Reference voltage Fixed Initial accuracy (Max) (%) 0.2 Rating Catalog VO adj (Min) (V) 1.25 VO adj (Max) (V) 1.25 Iz for regulation (Min) (uA) 1.2 Temp coeff (Max) (ppm/ degree C) 30, 50 Operating temperature range (C) -40 to 125 Iout/Iz (Max) (mA) 5 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


  • Small Package: SOT23-3
  • Fixed Reverse Breakdown Voltage of 1.25 V
  • Key Specifications
    • Output Voltage Tolerance: ±0.2% (Maximum)
    • Low Output Noise (0.1 Hz to 10 Hz): 25 µVpp (Typical)
    • Temperature Range: −40°C to +125°C
    • Operating Current Range: 1.2 µA to 5 mA
    • Low Temperature Coefficient From 0°C to +70°C: 30ppm/°C (Maximum)
    • Low Temperature Coefficient From –40°C to +85°C: 50ppm/°C (Maximum)

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The REF1112 device is a two-terminal shunt reference designed for power- and space-sensitive applications. The REF1112 features an operating current of 1 µA in a SOT23-3 package and is an improved, lower power solution for designs currently using voltage references in larger packages, such as the REF1004 and LT1004. The REF1112 is specified from –40°C to +85°C with operation extending from –40°C to +125°C.

The REF1112 complements other 1-µA components from Texas Instruments including the OPA349 and TLV240x low-power operational amplifiers, and the TLV349x micropower voltage comparator.

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Technical documentation

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Type Title Date
* Data sheet REF1112 10ppm/°C, 1-μA, 1.25-V Shunt Voltage Reference datasheet (Rev. D) Mar. 05, 2018
E-book Voltage Supervisor and Reset ICs: Tips, Tricks and Basics Jun. 28, 2019
White paper Voltage reference selection basics white paper (Rev. A) Oct. 23, 2018
Technical article Accurately measure vital signs with low Iq and a small form factor Mar. 28, 2018
Selection guide Voltage Reference Overview Jul. 26, 2013

Design & development

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Design tools & simulation

PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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Reference designs

Non-Isolated Bi-Directional Converter Reference Design for Battery Charging Applications
TIDA-00653 TIDA-00653 is a non-isolated 48 to 12-V bi-directional converter reference design for 48V battery applications enabled by the UCD3138 digital power controller. The design has the flexibility to work in either a ZVS transition-mode topology to optimize light-load efficiency, or a hard-switching (...)
document-generic Schematic document-generic User guide
Micropower Electrochemical Gas Sensor Amplifier Reference Design
TIDA-00854 — This reference design consists of a micropower “Potentistat” type electrochemical sensor circuit for battery operated portable or long-life portable or fixed remote location devices. Using a nanopower amplifier and reference circuit allows the circuit to function continuously and (...)
document-generic Schematic document-generic User guide
Power Solution for Xilinx FPGA Zynq 7 (1.8V@0.15A)
PMP8251 This reference design featuring multiple of the TPS54325 and other TI power devices, is a complete power solution for Xilinx Zynq FPGA. From 12V input, this reference solution provides all the power rails required by Zynq FPGA including DDR3 memory.
document-generic Schematic document-generic User guide

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