JAJSPG4K september   2003  – april 2023 THS3091 , THS3095

PRODUCTION DATA  

  1. 1 特長
  2. 2 アプリケーション
  3. 3 概要
  4. 4 Revision History
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
  7. 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 Electrical Characteristics: VS = ±15 V
    6. 7.6 Electrical Characteristics: VS = ±5 V
    7. 7.7 Typical Characteristics: ±15 V
    8. 7.8 Typical Characteristics: ±5 V
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Power-Down and Reference Pins Functionality
    4. 8.4 Device Functional Modes
      1. 8.4.1 Wideband, Noninverting Operation
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
      3. 9.2.3 Application Curves
    3. 9.3 Power Supply Recommendations
    4. 9.4 Layout
      1. 9.4.1 Layout Guidelines
        1. 9.4.1.1 PowerPAD Design Considerations
          1. 9.4.1.1.1 PowerPAD Layout Considerations
        2. 9.4.1.2 Power Dissipation and Thermal Considerations
      2. 9.4.2 Layout Example
  10. 10Device and Documentation Support
    1. 10.1 Device Support
      1. 10.1.1 Development Support
    2. 10.2 Documentation Support
      1. 10.2.1 Related Documentation
    3. 10.3 ドキュメントの更新通知を受け取る方法
    4. 10.4 サポート・リソース
    5. 10.5 Trademarks
    6. 10.6 静電気放電に関する注意事項
    7. 10.7 用語集
  11. 11Mechanical, Packaging, and Orderable Information

8.4.1 Wideband, Noninverting Operation

The THS309x are unity gain stable 715-MHz current-feedback operational amplifiers designed to operate from a ±5-V to ±15-V power supply. Figure 8-2 shows the THS3091 in a noninverting gain of 2-V/V configuration typically used to generate the performance curves. Most of the curves were characterized using signal sources with a 50-Ω source impedance, and with measurement equipment presenting a 50-Ω load impedance.

GUID-2DF7C05F-ACE8-4EB8-8AE3-8E3819910C1D-low.gifFigure 8-2 Wideband, Noninverting Gain Configuration

Current-feedback amplifiers are highly dependent on feedback resistor RF for maximum performance and stability. Table 8-1 shows the optimal gain-setting resistors RF and RG at different gains to give maximum bandwidth with minimal peaking in the frequency response. Higher bandwidths can be achieved (at the expense of added peaking in the frequency response) by using even lower values for RF. Conversely, increasing RF decreases the bandwidth, but improves stability.

Table 8-1 Recommended Resistor Values for Optimum Frequency Response
THS3091 AND THS3095 RF AND RG VALUES FOR MINIMAL PEAKING WITH RL = 100 Ω
GAIN (V/V)SUPPLY VOLTAGE (V)RG (Ω)RF (Ω)
1±5 and ±15—1.78 k
2±51.15 k1.15 k
±151.21 k1.21 k
5±5 and ±152491 k
10±5 and ±1595.3866
–1±5 and ±151.05 k1.05 k
–2±5 and ±154991 k
–5±5 and ±15182909
–10±5 and ±1586.6866