SNAS781C October   2020  – September 2021 REF70

PRODMIX  

  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Device Comparison Table
  6. Pin Configuration and Functions
  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 REF7012 Electrical Characteristics
    6. 7.6 REF7025 Electrical Characteristics
    7. 7.7 REF7040 Electrical Characteristics
    8. 7.8 REF7050 Electrical Characteristics
    9. 7.9 Typical Characteristics
  8. Parameter Measurement Information
    1. 8.1 Solder Heat Shift
    2. 8.2 Long-Term Stability
    3. 8.3 Thermal Hysteresis
    4. 8.4 Noise Performance
      1. 8.4.1 1/f Noise
      2. 8.4.2 Broadband Noise
    5. 8.5 Temperature Drift
    6. 8.6 Power Dissipation
  9. Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1 EN Pin
    4. 9.4 Device Functional Modes
      1. 9.4.1 Basic Connections
      2. 9.4.2 Negative Reference Voltage
  10. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Applications
      1. 10.2.1 Typical Application: Basic Voltage Reference Connection
        1. 10.2.1.1 Design Requirements
        2. 10.2.1.2 Detailed Design Procedure
          1. 10.2.1.2.1 Input and Output Capacitors
            1. 10.2.1.2.1.1 Application Curve
          2. 10.2.1.2.2 Force and Sense Connection
      2. 10.2.2 Typical Application: DAC Force and Sense Reference Drive Circuit
        1. 10.2.2.1 Design Requirements
  11. 11Power Supply Recommendation
  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 Receiving Notification of Documentation Updates
    3. 13.3 Support Resources
    4. 13.4 Trademarks
    5. 13.5 Electrostatic Discharge Caution
    6. 13.6 Glossary
  14. 14Mechanical, Packaging, and Orderable Information

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Features

  • Low noise enables precision measurements:
    • 1/f Noise (0.1 Hz to 10 Hz): 0.23 ppmp-p
    • 10 Hz to 1 kHz: 0.35 ppmrms
  • Low temperature drift coefficient:
    • 2 ppm/°C maximum (-40°C to 125°C)
  • High accuracy: ±0.025% maximum
  • Humidity resistant hermetic ceramic package (LCCC)
  • Low long-term stability (1k hr): 28 ppm
  • Low dropout: 400 mV
  • Designed for a wide range of applications:
    • Wide input voltage up to 18 V
    • Output current: ±10 mA
    • Voltage options: 1.25 V, 2.5 V, 3 V, 3.3 V, 4.096 V, 5 V
  • Ultra-flexible solution:
    • Stable with 1-μF to 100-μF output low-ESR capacitor
    • High PSRR: 107 dB at 1 kHz
    • Operating temperature range: −40°C to +125°C