SBOS283E September   2003  – December 2024 REF1112

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
    4. 6.4 Device Functional Modes
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Applications
      1. 7.2.1 Shunt Regulator
        1. 7.2.1.1 Design Requirements
        2. 7.2.1.2 Detailed Design Procedure
      2. 7.2.2 MicroPOWER 3μA, 1V Voltage Reference
        1. 7.2.2.1 Design Requirements
        2. 7.2.2.2 Detailed Design Procedure
      3. 7.2.3 2.5V Reference on 1μA
        1. 7.2.3.1 Design Requirements
        2. 7.2.3.2 Detailed Design Procedure
      4. 7.2.4 Adjustable Voltage Shunt Reference
      5. 7.2.5 Level Shift to Achieve Full ADC Input Range
      6. 7.2.6 Stable Current Source
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Receiving Notification of Documentation Updates
    2. 8.2 Support Resources
    3. 8.3 Trademarks
    4. 8.4 Electrostatic Discharge Caution
    5. 8.5 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

6.4 Device Functional Modes

The REF1112 device is a fixed output voltage part where the feedback is internal. Therefore, the part can only operate in a closed-loop mode and the output voltage cannot be adjusted. The output voltage remains in regulation as long as IREF is between IREFMIN (see Electrical Characteristics) and IREFMAX is 5mA. A proper selection of the external resistor for input voltage range and load current range maintains that these conditions are met.