Home Power management Voltage references Series voltage references
Home
Power management
Voltage references
Series voltage references

REF31-Q1

ACTIVE

Automotive, 20-ppm/°C (max), 100-µA, 3-pin SOT-23 series voltage reference

Order now
Data sheet

REF31-Q1

ACTIVE
Data sheet Order now

Product details

Rating Automotive VO (V) 1.25, 2.048, 2.5, 3, 3.3, 4.096 Temp coeff (max) (ppm/°C) 20 Initial accuracy (max) (%) 0.2 Iout/Iz (max) (mA) 10 Vin (min) (V) 1.8 Vin (max) (V) 5.5 Iq (typ) (mA) 0.1, 100 TI functional safety category Functional Safety-Capable LFN 0.1 to 10 Hz (typ) (µVPP) 17, 27, 33, 39, 43, 53 Operating temperature range (°C) -40 to 125
Rating Automotive VO (V) 1.25, 2.048, 2.5, 3, 3.3, 4.096 Temp coeff (max) (ppm/°C) 20 Initial accuracy (max) (%) 0.2 Iout/Iz (max) (mA) 10 Vin (min) (V) 1.8 Vin (max) (V) 5.5 Iq (typ) (mA) 0.1, 100 TI functional safety category Functional Safety-Capable LFN 0.1 to 10 Hz (typ) (µVPP) 17, 27, 33, 39, 43, 53 Operating temperature range (°C) -40 to 125
SOT-23 (DBZ) 3 6.9204 mm² 2.92 x 2.37
  • 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
  • Functional Safety-Capable
    • Documentation available to aid functional safety system design
  • High accuracy: 0.2% maximum
  • Excellent specified drift performance:
    • 20ppm/°C (maximum) from –40°C to +125°C
  • High output current: ±10mA
  • Low dropout: 5mV
  • Low IQ: 115µA maximum
  • Low noise: 17µVp-p/V
  • No output capacitor required
  • Available voltage options : 1.2V, 2V, 2.5V, 3V, 3.3V, 4V
  • Micro size package: 3-Pin SOT-23
  • 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
  • Functional Safety-Capable
    • Documentation available to aid functional safety system design
  • High accuracy: 0.2% maximum
  • Excellent specified drift performance:
    • 20ppm/°C (maximum) from –40°C to +125°C
  • High output current: ±10mA
  • Low dropout: 5mV
  • Low IQ: 115µA maximum
  • Low noise: 17µVp-p/V
  • No output capacitor required
  • Available voltage options : 1.2V, 2V, 2.5V, 3V, 3.3V, 4V
  • Micro size package: 3-Pin SOT-23

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 (100µA typical) make it suitable for portable and battery-powered applications. The REF31xx-Q1 does not require a load capacitor and can sink or source up to 10mA of output current.

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

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 (100µA typical) make it suitable for portable and battery-powered applications. The REF31xx-Q1 does not require a load capacitor and can sink or source up to 10mA of output current.

Unloaded, the REF31xx-Q1 can operate on supplies down to 5mV above the output voltage. All models are specified for the wide temperature range of –40°C to +125°C.
filter Find other Series voltage references
Download View video with transcript Video

Similar products you might be interested in

open-in-new Compare alternates
Same functionality with different pin-out to the compared device
REF35-Q1 ACTIVE Automotive, 650-nA quiescent current, 15-ppm/°C drift, ultra-low-power precision voltage reference Same functionality with different pin-out to the compared device with better performance and lower Iq

Technical documentation

star =Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 8
Top documentation Type Title Format options Date
* Data sheet REF31xx-Q1 15ppm/°C Maximum, 100µA, SOT-23 Series Voltage Reference datasheet (Rev. A) PDF | HTML 14 Sep 2025
Application note Voltage Reference Selection and Design Tips For Data Converters (Rev. B) PDF | HTML 09 Jan 2024
E-book Tips and tricks for designing with voltage references (Rev. A) 07 May 2021
Functional safety information REF31xx-Q1 Functional Safety FIT Rate and Failure Mode Distribution 18 Dec 2019
E-book Voltage Supervisor and Reset ICs: Tips, Tricks and Basics 28 Jun 2019
White paper Voltage reference selection basics white paper (Rev. A) 23 Oct 2018
Application brief Choosing the Right Voltage Reference for Your Automotive Application 17 Jul 2018
Analog Design Journal Getting the most out of your instrumentation amplifier design 10 Oct 2005

Design & development

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

Evaluation board

DIP-ADAPTER-EVM — DIP adapter evaluation module

Speed up your op amp prototyping and testing with the DIP adapter evaluation module (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 (...)

User guide: PDF
Not available on TI.com
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

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 (...)
Request
Package Pins CAD symbols, footprints & 3D models
SOT-23 (DBZ) 3 Ultra Librarian
TI's Standard Terms and Conditions for Evaluation Items apply.

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
Information included:
  • Fab location
  • Assembly location

Support & training

TI E2E™ forums with technical support from TI engineers

View all forum topics

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos