Product details


VO (V) 1.25, 2.048, 2.5, 3, 3.3, 4.096 Initial accuracy (Max) (%) 0.2 Temp coeff (Max) (ppm/ degree C) 20 Rating Automotive Vin (Min) (V) 1.8 Vin (Max) (V) 5.5 Iq (Typ) (uA) 100 TI functional safety category Functional Safety-Capable Iout/Iz (Max) (mA) 10 Operating temperature range (C) -40 to 125 open-in-new Find other Series voltage references

Package | Pins | Size

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


  • AEC-Q100 Qualified With the Following Results:
    • Device TA Range: –40°C to 125°C
    • Device HBM ESD Classification Level H1C
    • Device CDM ESD Classification Level C4A
  • High Accuracy: 0.2% Maximum
  • Excellent Specified Drift Performance:
    • 20 ppm/°C (Maximum) from –40°C to +125°C
  • High Output Current: ±10 mA
  • Low Dropout: 5 mV
  • Low IQ: 115 µA Maximum
  • Low Noise: 17 µVp-p/V
  • No Output Capacitor Required
  • Available Voltage Options : 1.2 V, 2 V, 2.5 V, 3 V, 3.3 V, 4 V
  • MicroSize Package: 3-Pin SOT-23

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The REF31xx-Q1 is a family of precision, low power, low dropout, series voltage references available in the tiny 3-pin SOT-23 package.

The REF31xx-Q1 small size and low power consumption (100 µA typical) make it ideal for portable and battery-powered applications. The REF31xx-Q1 does not require a load capacitor, but is stable with any capacitive load and can sink or source up to 10 mA of output current.

Unloaded, the REF31xx-Q1 can operate on supplies down to 5 mV above the output voltage. All models are specified for the wide temperature range of –40°C to +125°C.

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Technical documentation

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Type Title Date
* Datasheet REF31xx-Q1 15 ppm/°C Maximum, 100-µA, SOT-23 Series Voltage Reference datasheet Apr. 12, 2017
Application notes REF31xx-Q1 Functional Safety FIT Rate and Failure Mode Distribution Dec. 18, 2019
White papers Voltage Supervisor and Reset ICs: Tips, Tricks and Basics Jun. 28, 2019
Application notes Choosing the Right Voltage Reference for Your Automotive Application Jul. 17, 2018

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

document-generic User guide

Speed up your op amp prototyping and testing with the DIP-Adapter-EVM, which provides a fast, easy and inexpensive way to interface with small, surface-mount ICs. You can connect any supported op amp using the included Samtec terminal strips or wire them directly to existing circuits.

The (...)

  • Simplifies prototyping of SMT IC’s
  • Supports 6 common package types
  • Low Cost

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SOT-23 (DBZ) 3 View options

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