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  • REF33xx 3.9-μA, SC70-3, SOT-23-3, and UQFN-8, 30-ppm/°C Drift Voltage Reference

    • SBOS392H August   2007  – August 2019 REF3312 , REF3318 , REF3320 , REF3325 , REF3330 , REF3333

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  • REF33xx 3.9-μA, SC70-3, SOT-23-3, and UQFN-8, 30-ppm/°C Drift Voltage Reference
  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      REF3312 in a Single-Supply Signal Chain
      2.      Dropout Voltage vs Load Current
  4. 4 Revision History
  5. 5 Device Comparison
  6. 6 Pin Configuration and Functions
    1. Table 1. Pin Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Typical Characteristics
  8. 8 Parameter Measurement Information
    1. 8.1 Thermal Hysteresis
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1 Start-Up Time
      2. 9.3.2 Low Temperature Drift
      3. 9.3.3 Power Dissipation
      4. 9.3.4 Noise Performance
    4. 9.4 Device Functional Modes
  10. 10Applications and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Applications
      1. 10.2.1 REF3312 in a Bipolar Signal-Chain Configuration
        1. 10.2.1.1 Design Requirements
        2. 10.2.1.2 Detailed Design Procedure
          1. 10.2.1.2.1 Op Amp Level-Shift Design
          2. 10.2.1.2.2 Differential Input Attenuator Design
          3. 10.2.1.2.3 Input Filtering
          4. 10.2.1.2.4 Component Selection
            1. 10.2.1.2.4.1 Voltage References
            2. 10.2.1.2.4.2 Op Amp
          5. 10.2.1.2.5 Input Attenuation and Level Shifting
          6. 10.2.1.2.6 Input Filtering
          7. 10.2.1.2.7 Passive Component Tolerances and Materials
        3. 10.2.1.3 Application Curves
          1. 10.2.1.3.1 DC Performance
          2. 10.2.1.3.2 AC Performance
  11. 11Power-Supply Recommendations
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
  13. 13Device and Documentation Support
    1. 13.1 Documentation Support
      1. 13.1.1 Related Documentation
    2. 13.2 Related Links
    3. 13.3 Receiving Notification of Documentation Updates
    4. 13.4 Community Resources
    5. 13.5 Trademarks
    6. 13.6 Electrostatic Discharge Caution
    7. 13.7 Glossary
  14. 14Mechanical, Packaging, and Orderable Information
  15. IMPORTANT NOTICE

Package Options

Mechanical Data (Package|Pins)
  • RSE|8
    • MPQF207E
  • DCK|3
    • MPDS295G
  • DBZ|3
    • MPDS108G
Thermal pad, mechanical data (Package|Pins)
Orderable Information
  • sbos392h_oa
  • sbos392h_pm
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  • Full reading width
    • Full reading width
    • Comfortable reading width
    • Expanded reading width
  • Card for each section
  • Card with all content

 

DATA SHEET

REF33xx 3.9-μA, SC70-3, SOT-23-3, and UQFN-8, 30-ppm/°C Drift Voltage Reference

1 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

2 Applications

  • Portable Equipment
  • Tablets and Smartphones
  • Hard Disk Drives
  • Sensor Modules
  • Data Acquisition Systems
  • Medical Equipment
  • Test Equipment

3 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.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
REF33xx SOT-23 (3) 2.92 mm × 1.30 mm
SC70 (3) 2.00 mm × 1.25 mm
UQFN (8) 1.50 mm × 1.50 mm
  1. For all available packages, see the package option addendum at the end of the datasheet.

Device Images

REF3312 in a Single-Supply Signal Chain

REF3312 REF3318 REF3320 REF3325 REF3330 REF3333 ai_cir01_bos392.gif

Dropout Voltage vs Load Current

REF3312 REF3318 REF3320 REF3325 REF3330 REF3333 tc_vdo-iload_bos392.gif

4 Revision History

Changes from G Revision (December 2016) to H Revision

  • Changed maximum operating current value in Recommended Operating Conditions sectionGo
  • Changed table title to REF33xx (REF3312, REF3320, REF3325, REF3330, REF3333, REF3340) Go

Changes from G Revision (December 2016) to H Revision

  • Changed maximum operating current value in Recommended Operating Conditions sectionGo
  • Changed table title to REF33xx (REF3312, REF3320, REF3325, REF3330, REF3333, REF3340) Go

Changes from F Revision (November 2016) to G Revision

  • Added Long-term stability parameter and associated footnote to REF33xx section of Electrical Characteristics tableGo

Changes from E Revision (October 2014) to F Revision

  • Changed minimum supply voltage value in second paragraph of Description section Go
  • Changed Device Information table Go
  • Changed ESD Ratings table: changed title and format, moved Tstg parameter to Absolute Maximum Ratings table Go
  • Changed supply voltage value in footnote of Recommended Operating Conditions tableGo
  • Changed supply voltage value in footnote 1 of Electrical Characteristics table Go
  • Changed minimum supply voltage value in Device Functional Modes section Go
  • Changed minimum supply voltage value in Power-Supply Recommendations section Go

Changes from D Revision (June 2014) to E Revision

  • Added REF3325 UQFN package to data sheetGo
  • Added note to Applications and Implementation sectionGo

Changes from C Revision (March 2014) to D Revision

  • Added note to Recommended Operating ConditionsGo
  • Moved Thermal Hysteresis section to Parameter Measurement Information sectionGo
  • Changed Applications and Implementation section to latest standard; added new sections Go

Changes from B Revision (February 2014) to C Revision

  • Changed Recommended Operating Conditions supply input voltage range maximum value from 55 to 5.5Go

Changes from A Revision (September 2007) to B Revision

  • Changed document format to meet latest data sheet standards; added new sections and moved existing sectionsGo
  • Moved package figures from front page to Pin Configuration and FunctionsGo
  • Added new figures to front page Go
  • Deleted Ordering Information table; see Package Option Addendum for most current ordering informationGo
  • Added RSE pin configurationGo
  • Added Thermal Information tableGo
  • Deleted Thermal Resistance parameter in Electrical Characteristics; see new Thermal Information tableGo

5 Device Comparison

PRODUCT DESCRIPTION
REF3312 1.25 V
REF3318 1.8 V
REF3320 2.048 V
REF3325 2.5 V
REF3330 3.0 V
REF3333 3.3 V

6 Pin Configuration and Functions

REF3312, REF3318, REF3320, REF3325, REF3330, REF3333
DBZ Package and DCK Package
SOT-23-3, SC70-3
(Top View)
REF3312 REF3318 REF3320 REF3325 REF3330 REF3333 po_bos392.gif
REF3312, REF3318, REF3320, REF3325, REF3330, REF3333
RSE Package
UQFN-8
(Top View)
REF3312 REF3318 REF3320 REF3325 REF3330 REF3333 po_rse_uqfn-8_bos392.gif

Table 1. Pin Functions

PIN DESCRIPTION
NAME DBZ, DCK RSE
GND 3 4 Ground
IN 1 5 Input supply voltage
NC — 1, 2, 3, 6, 7 Not connected
OUT 2 8 Output voltage

7 Specifications

 
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