JAJSEW1D September   2003  – March 2018 REF1112

PRODUCTION DATA.  

  1. 1 特長
  2. 2 アプリケーション
  3. 3 概要
    1.     Device Images
      1.      シャント基準電圧アプリケーションの回路図
      2.      ピン配置
  4. 4 改訂履歴
  5. 5 Pin Configuration and Functions
    1.     Pin Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
    4. 7.4 Device Functional Modes
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 Shunt Regulator
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
      2. 8.2.2 MicroPOWER 3-μA, 1-V Voltage Reference
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
      3. 8.2.3 2.5-V Reference on 1 μA
        1. 8.2.3.1 Design Requirements
        2. 8.2.3.2 Detailed Design Procedure
      4. 8.2.4 Adjustable Voltage Shunt Reference
      5. 8.2.5 Level Shift to Achieve Full ADC Input Range
      6. 8.2.6 Stable Current Source
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11デバイスおよびドキュメントのサポート
    1. 11.1 ドキュメントの更新通知を受け取る方法
    2. 11.2 コミュニティ・リソース
    3. 11.3 商標
    4. 11.4 静電気放電に関する注意事項
    5. 11.5 Glossary
  12. 12メカニカル、パッケージ、および注文情報

パッケージ・オプション

メカニカル・データ（パッケージ｜ピン）
サーマルパッド・メカニカル・データ
発注情報

8.2.1.2 Detailed Design Procedure

When using the REF1112 as a reference, determine the following:

  • Supply voltage range
  • Current source resistance
  • Reference voltage accuracy

To design using the REF1112, is it important to ensure that the VS is larger than VREF.

The resistor RBIAS sets the cathode current of the REF1112, IR. Ensure that this current remains in the operational region of the part for the entire VS and load range.

Using this information, select a RBIAS such that:

IREFMIN< IREF< IREFMAX where IREFMAX = 5 mA.

In this application the IREF is the operating current of the REF1112 plus the maximum possible ILOAD under no-load conditions.