SBAS804A September 2017  – December 2017 REF3425 , REF3430 , REF3433

PRODUCTION DATA. 

  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Device Comparison Table
  6. Pin Configuration and Functions
  7. Specifications
    1. 7.1Absolute Maximum Ratings
    2. 7.2ESD Ratings
    3. 7.3Recommended Operating Conditions
    4. 7.4Thermal Information
    5. 7.5Electrical Characteristics
    6. 7.6Typical Characteristics
  8. Parameter Measurement Information
    1. 8.1Solder Heat Shift
    2. 8.2Long-Term Stability
    3. 8.3Thermal Hysteresis
    4. 8.4Power Dissipation
    5. 8.5Noise Performance
  9. Detailed Description
    1. 9.1Overview
    2. 9.2Functional Block Diagram
    3. 9.3Feature Description
      1. 9.3.1Supply Voltage
      2. 9.3.2Low Temperature Drift
      3. 9.3.3Load Current
    4. 9.4Device Functional Modes
      1. 9.4.1 EN Pin
      2. 9.4.2Negative Reference Voltage
  10. 10Applications and Implementation
    1. 10.1Application Information
    2. 10.2Typical Application: Basic Voltage Reference Connection
      1. 10.2.1Design Requirements
      2. 10.2.2Detailed Design Procedure
        1. 10.2.2.1Input and Output Capacitors
        2. 10.2.2.24-Wire Kelvin Connections
        3. 10.2.2.3VIN Slew Rate Considerations
        4. 10.2.2.4Shutdown/Enable Feature
      3. 10.2.3Application Curves
  11. 11Power-Supply Recommendations
  12. 12Layout
    1. 12.1Layout Guidelines
    2. 12.2Layout Example
  13. 13Device and Documentation Support
    1. 13.1Documentation Support
      1. 13.1.1Related Documentation
    2. 13.2Receiving Notification of Documentation Updates
    3. 13.3Community Resources
    4. 13.4Trademarks
    5. 13.5Electrostatic Discharge Caution
    6. 13.6Glossary
  14. 14Mechanical, Packaging, and Orderable Information

Features

  • Initial Accuracy: ±0.05% (Maximum)
  • Temperature Coefficient : 6 ppm/°C (Maximum)
  • Operating Temperature Range: −40°C to +125°C
  • Output Current: ±10 mA
  • Low Quiescent Current: 95 μA (Maximum)
  • Wide Input Voltage: 12 V
  • Output 1/f Noise (0.1 Hz to 10 Hz): 5 µVPP/V
  • Excellent Long-Term Stability 30 ppm/1000 hrs
  • Small Footprint 6-Pin SOT-23 Package

Applications

  • Precision Data Acquisition Systems
  • PLC Analog I/O Modules
  • Field Transmitters
  • Portable, Battery - Operated Equipment
  • Industrial Instrumentation
  • Test Equipment
  • Power Monitoring
  • LCR Meters

Description

The REF34xx device is a low temperature drift
(6 ppm/°C), low-power, high-precision CMOS voltage reference, featuring ±0.05% initial accuracy, low operating current with power consumption less than 95 μA. This device also offers very low output noise of 5 μVp-p /V, which enables its ability to maintain high signal integrity with high-resolution data converters in noise critical systems. With a small SOT-23 package, REF34xx offers enhanced specifications and pin-to-pin replacement for MAX607x and ADR34xx. The REF34xx family is compatible to most of the ADC and DAC such as ADS1287, ADUCM360, ADS1112.

Stability and system reliability are further improved by the low output-voltage hysteresis of the device and low long-term output voltage drift. Furthermore, the small size and low operating current of the devices (95 μA) can benefit portable and battery-powered applications.

REF34xx is specified for the wide temperature range of −40°C to +125°C. Contact the TI sales representative for additional voltage options.

Device Information(1)

PART NAMEPACKAGEBODY SIZE (NOM)
REF3425SOT-23 (6)2.90 mm × 1.60 mm
REF3430
REF3433
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Simplified Schematic

REF3425 REF3430 REF3433 REF34xx-simplified-schematic-sbas804.gif

Dropout vs. Current Load Over Temperature

REF3425 REF3430 REF3433 D001_Dropout_v2.gif