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Product details

Parameters

VO (V) 2.5 Initial accuracy (Max) (%) 0.15 Temp coeff (Max) (ppm/ degree C) 30 Rating Catalog Vin (Min) (V) 2.7 Vin (Max) (V) 5.5 Iq (Typ) (uA) 3.9 TI functional safety category Functional Safety-Capable Iout/Iz (Max) (mA) 5 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 SOT-SC70 (DCK) 3 3 mm² 2 x 1.3 UQFN (RSE) 8 2 mm² 2 x 1.5 open-in-new Find other Series voltage references

Features

  • 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

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Description

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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Technical documentation

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Type Title Date
* Datasheet REF33xx 3.9-μA, SC70-3, SOT-23-3, and UQFN-8, 30-ppm/°C Drift Voltage Reference datasheet (Rev. H) Jan. 16, 2018
White paper Simplifying Signal Chain Design for High Performance in Small Systems Oct. 22, 2020
Functional safety information REF33xx Functional Safety FIT Rate and Failure Mode Distribution Dec. 18, 2019
E-book Voltage Supervisor and Reset ICs: Tips, Tricks and Basics Jun. 28, 2019
Application note Diode-Based Temperature Measurements (Rev. A) May 17, 2019
White paper Voltage reference selection basics white paper (Rev. A) Oct. 23, 2018

Design & development

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

Hardware development

EVALUATION BOARD Download
10
Description

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 (...)

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

Design tools & simulation

SIMULATION MODEL Download
SBOM239A.ZIP (36 KB) - PSpice Model
SIMULATION MODEL Download
SBOM240A.TSC (93 KB) - TINA-TI Reference Design
SIMULATION MODEL Download
SBOM241A.ZIP (6 KB) - TINA-TI Spice Model
SIMULATION TOOL Download
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 (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)

Reference designs

REFERENCE DESIGNS Download
Seamless switchover for backup power reference design
TIDA-01638 — This TI reference design showcases Power MUXing with redundant power. If one power source fails, the system needs to switchover to a backup power source and provide an uninterrupted source of power to downstream loads. Therefore, power redundancy ensures that if one power supply were to fail, the (...)
document-generic Schematic
REFERENCE DESIGNS Download
Wireless IoT, Bluetooth® Low Energy, 4½ Digit, 100kHz True RMS Digital Multimeter
TIDA-01012 — Many products are now becoming connected through the Internet of Things (IoT), including test equipment such as digital multimeters (DMM).  Enabled by Texas Instruments’ SimpleLink™ ultra-low power wireless microcontroller (MCU) platform, the TIDA-01012 reference design demonstrates (...)
document-generic Schematic
REFERENCE DESIGNS Download
Enhanced Accuracy Battery Fuel Gauge Reference Design for Low Power Industrial IoT Field Metering
TIDA-01014 The Internet of Things (IoT) revolution is efficiently connecting applications and instruments, enabling battery powered, wide scale very low power sensor deployment.  New technologies, such as TI’s advanced sensor and low power connectivity devices, are enabling these instruments to be (...)
document-generic Schematic
REFERENCE DESIGNS Download
Analog PWM Generator 5V, 500kHz PWM Output
TIPD108 This Verified Design utilizes a triangle wave generator and comparator to generate a pulse-width-modulated (PWM) waveform with a duty cycle that is inversely proportional to the input voltage. An op amp and comparator generate a triangular waveform which is passed to one input of a comparator. By (...)
document-generic Schematic
REFERENCE DESIGNS Download
Data Acquisition at 1KHz AC, 1mW, 18bit, 1Msps Reference Design
TIPD114 This TI Verified Design provides results of a low power, low throughput use case of ADS8881. One of the ways to reduce power for a low throughput application is to select a high throughput (1 MSPS) part and run it at low speed. The power consumed by ADS8881 is 55uW for 10kSPS. The reference drive (...)
document-generic Schematic

CAD/CAE symbols

Package Pins Download
SC70 (DCK) 3 View options
SOT-23 (DBZ) 3 View options
UQFN (RSE) 8 View options

Ordering & quality

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