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Series voltage references

REF31-Q1

ACTIVE

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

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Data sheet

REF31-Q1

ACTIVE
Data sheet Order now

Product details

VO (V) 1.25, 2.048, 2.5, 3, 3.3, 4.096 Initial accuracy (max) (%) 0.2 Temp coeff (max) (ppm/°C) 20 Vin (min) (V) 1.8 Vin (max) (V) 5.5 Iq (typ) (mA) 0.1 Rating Automotive TI functional safety category Functional Safety-Capable LFN 0.1 to 10 Hz (typ) (µVPP) 17, 27, 33, 39, 43, 53 Iout/Iz (max) (mA) 10 Operating temperature range (°C) -40 to 125
VO (V) 1.25, 2.048, 2.5, 3, 3.3, 4.096 Initial accuracy (max) (%) 0.2 Temp coeff (max) (ppm/°C) 20 Vin (min) (V) 1.8 Vin (max) (V) 5.5 Iq (typ) (mA) 0.1 Rating Automotive TI functional safety category Functional Safety-Capable LFN 0.1 to 10 Hz (typ) (µVPP) 17, 27, 33, 39, 43, 53 Iout/Iz (max) (mA) 10 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
  • 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
  • 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

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.

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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Type Title Date
* Data sheet REF31xx-Q1 15 ppm/°C Maximum, 100-µA, SOT-23 Series Voltage Reference datasheet PDF | HTML 12 Apr 2017
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

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