JAJSS69B September   2000  – April 2024 OPA627 , OPA637

PRODMIX  

  1.   1
  2. 1 特長
  3. 2 アプリケーション
  4. 3 概要
  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: OPA627
    5. 5.5 Thermal Information: OPA637
    6. 5.6 Electrical Characteristics: OPA627BU, OPA627AU
    7. 5.7 Electrical Characteristics: OPA627AM, OPA627BM, OPA627SM
    8. 5.8 Electrical Characteristics: OPA637
    9. 5.9 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 Offset Voltage Adjustment
      2. 6.3.2 Noise Performance
      3. 6.3.3 Input Bias Current
      4. 6.3.4 Phase-Reversal Protection
      5. 6.3.5 Output Overload
      6. 6.3.6 Capacitive Loads
      7. 6.3.7 Input Protection
      8. 6.3.8 EMI Rejection Ratio (EMIRR)
        1. 6.3.8.1 EMIRR IN+ Test Configuration
      9. 6.3.9 Settling Time
    4. 6.4 Device Functional Modes
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 Design Requirements
      2. 7.2.2 Detailed Design Procedure
      3. 7.2.3 Application Curve
    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 Device Support
      1. 8.1.1 Development Support
        1. 8.1.1.1 TINA-TI™シミュレーション・ソフトウェア (無償ダウンロード)
        2. 8.1.1.2 Analog Filter Designer
        3. 8.1.1.3 TI のリファレンス・デザイン
    2. 8.2 Documentation Support
      1. 8.2.1 Related Documentation
    3. 8.3 ドキュメントの更新通知を受け取る方法
    4. 8.4 サポート・リソース
    5. 8.5 Trademarks
    6. 8.6 静電気放電に関する注意事項
    7. 8.7 用語集
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

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

6.3 Feature Description

The OPA627 is unity-gain stable. The OPA637 achieves higher speed and bandwidth in circuits with noise gain greater than 5. Noise gain refers to the closed-loop gain of a circuit, as if the noninverting operational amplifier (op amp) input were being driven. For example, the OPA637 can be used in a noninverting amplifier with gain greater than 5, or an inverting amplifier of gain greater than 4.

When choosing between the OPA627 or OPA637, consider the high frequency noise gain of the circuit configuration. Circuits with a feedback capacitor (see Figure 6-1) place the operational amplifier in unity noise-gain at high frequency. These applications must use the OPA627 for proper stability. An exception is the circuit in Figure 6-2, where a small feedback capacitance is used to compensate for the input capacitance at the inverting input of the operational amplifier. In this case, the closed-loop noise gain remains constant with frequency, so if the closed-loop gain is equal to 5 or greater, the OPA637 can be used.

OPA627 OPA637 Circuits With Noise Gain Less Than 5 Require the OPA627 for Proper Stability Figure 6-1 Circuits With Noise Gain Less Than 5 Require the OPA627 for Proper Stability
OPA627 OPA637 Circuits With Noise Gain Equal to or Greater Than 5 Can Use the OPA637 Figure 6-2 Circuits With Noise Gain Equal to or Greater Than 5 Can Use the OPA637