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Series voltage references

REF3333

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3.3-V, 30-ppm/°C drift, 3.9-µA, 3-pin SOT-23, 3-pin SC70, 8-pin UQFN voltage reference

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REF35 ACTIVE 650-nA quiescent current, 12-ppm/°C drift, ultra-low-power precision voltage reference 680-nA ultra-low-power, wide OTP programmable-voltage option from 1.024 V to 5 V and high precision at 0.05% intial accuracy and 6ppm/°C drift.

REF3333

ACTIVE
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Product details

VO (V) 3.3 Initial accuracy (max) (%) 0.15 Temp coeff (max) (ppm/°C) 30 Vin (min) (V) 3.5 Vin (max) (V) 5.5 Iq (typ) (mA) 0.0039 Rating Catalog LFN 0.1 to 10 Hz (typ) (µVPP) 92 Iout/Iz (max) (mA) 5 Operating temperature range (°C) -40 to 125
VO (V) 3.3 Initial accuracy (max) (%) 0.15 Temp coeff (max) (ppm/°C) 30 Vin (min) (V) 3.5 Vin (max) (V) 5.5 Iq (typ) (mA) 0.0039 Rating Catalog LFN 0.1 to 10 Hz (typ) (µVPP) 92 Iout/Iz (max) (mA) 5 Operating temperature range (°C) -40 to 125
SOT-23 (DBZ) 3 6.9204 mm² 2.92 x 2.37 SOT-SC70 (DCK) 3 4.2 mm² 2 x 2.1
  • Microsize Packages: SC70-3, SOT-23-3, UQFN-8
  • Low Supply Current: 3.9 µA (typ)
  • Extremely Low Dropout Voltage: 110 mV (typ)
  • High Output Current: ±5 mA
  • Low Temperature Drift: 30 ppm/°C (max)
  • High Initial Accuracy: ±0.15% (max)
  • 0.1-Hz to 10-Hz Noise: 35 µVPP (REF3312)
  • Voltage Options: 1.2 V, 1.8 V, 2.5 V, 3 V, 3.3 V
  • Microsize Packages: SC70-3, SOT-23-3, UQFN-8
  • Low Supply Current: 3.9 µA (typ)
  • Extremely Low Dropout Voltage: 110 mV (typ)
  • High Output Current: ±5 mA
  • Low Temperature Drift: 30 ppm/°C (max)
  • High Initial Accuracy: ±0.15% (max)
  • 0.1-Hz to 10-Hz Noise: 35 µVPP (REF3312)
  • Voltage Options: 1.2 V, 1.8 V, 2.5 V, 3 V, 3.3 V

The REF33xx is a low-power, precision, low-dropout voltage reference family available in tiny SC70-3 and SOT-23-3 packages, and in a 1.5-mm × 1.5-mm UQFN-8 package. Small size and low power consumption (5-µA max) make the REF33xx ideal for a wide variety of portable and battery-powered applications.

The REF33xx can be operated at a supply voltage 180 mV above the specified output voltage under normal load conditions, with the exception of the REF3312, which has a minimum supply voltage of 1.7 V. All models are specified for the wide temperature range of –40°C to +125°C.

 

 

The REF33xx is a low-power, precision, low-dropout voltage reference family available in tiny SC70-3 and SOT-23-3 packages, and in a 1.5-mm × 1.5-mm UQFN-8 package. Small size and low power consumption (5-µA max) make the REF33xx ideal for a wide variety of portable and battery-powered applications.

The REF33xx can be operated at a supply voltage 180 mV above the specified output voltage under normal load conditions, with the exception of the REF3312, which has a minimum supply voltage of 1.7 V. All models are specified for the wide temperature range of –40°C to +125°C.

 

 
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Type Title Date
* Data sheet REF33xx 3.9-μA, SC70-3, SOT-23-3, and UQFN-8, 30-ppm/°C Drift Voltage Reference datasheet (Rev. H) PDF | HTML 16 Jan 2018
Selection guide Current Sense Amplifiers (Rev. E) 20 Sep 2021
Application note Voltage Reference Design Tips For ADC Pairing (Rev. A) PDF | HTML 02 Jun 2021
E-book Tips and tricks for designing with voltage references (Rev. A) 07 May 2021
White paper Simplifying Signal Chain Design for High Performance in Small Systems 22 Oct 2020
Functional safety information REF33xx 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
Application note Diode-Based Temperature Measurements (Rev. A) 17 May 2019
White paper Voltage reference selection basics white paper (Rev. A) 23 Oct 2018
Application note Level Shifting Signals With Differential Amplifiers (Rev. A) 02 Apr 2018
Technical article Accurately measure vital signs with low Iq and a small form factor 28 Mar 2018
Analog Design Journal Getting the most out of your instrumentation amplifier design 10 Oct 2005

Design & development

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MathWorks MATLAB & Simulink example models include the following:

User guide: PDF
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Simulation model

REF3333 PSpice Model (Rev. A)

SBOM245A.ZIP (36 KB) - PSpice Model
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Simulation model

REF3333 TINA-TI Reference Design (Rev. A)

SBOM246A.TSC (107 KB) - TINA-TI Reference Design
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Simulation model

REF3333 TINA-TI Spice Model (Rev. A)

SBOM247A.ZIP (6 KB) - TINA-TI Spice Model
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Simulation tool

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

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Reference designs

TIDA-00913 — 48V 3-Phase Inverter with Shunt-based In-line Motor Phase Current Sensing Reference Design

The TIDA-00913 reference design realizes a 48V/10A 3-phase GaN inverter with precision in-line shunt-based phase current sensing for accurate control of precision drives such as servo drives. One of the largest challenges with in-line shunt-based phase current sensing is the high common-mode (...)
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Schematic: PDF
Reference designs

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Schematic: PDF
Package Pins Download
SOT-23 (DBZ) 3 View options
SOT-SC70 (DCK) 3 View options
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