JAJSJO7E December   2002  – August 2020 THS7530

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 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: Main Amplifier
    6. 6.6 Package Thermal Data
    7. 6.7 Typical Characteristics
  7. 7 Parameter Measurement Information
    1. 7.1 Test Circuits
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Continually-Variable Gain Control
      2. 8.3.2 Common-Mode Voltage Control
      3. 8.3.3 Output Voltage Clamps
      4. 8.3.4 Power-Down Mode
    4. 8.4 Device Functional Modes
  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
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Examples
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Third-Party Products Disclaimer
      2. 12.1.2 Development Support
    2. 12.2 Documentation Support
      1. 12.2.1 Related Documentation
    3. 12.3 Support Resources
    4. 12.4 Trademarks
    5. 12.5 静電気放電に関する注意事項
    6. 12.6 Glossary
  13. 13Mechanical, 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

8.1 Overview

The THS7530 device is a fully-differential amplifier with 300-MHz bandwidth and with continually-variable gain from 11.6 dB to 46.5 dB. This amplifier together with an automatic gain control (AGC) circuit will precisely established a desired amplitude at its output.

The input architecture is a modified Gilbert cell. The output from the Gilbert cell is converted to a voltage and buffered to the output as a fully-differential signal. A summing node between the outputs is used to compare the output common-mode voltage to the VOCM input. The VOCM error amplifier then servos the output common-mode voltage to maintain it equal to the VOCM input. Left unterminated, VOCM is set to midsupply by internal resistors.

The gain control input is conditioned to give linear-in-dB gain control (block H). The gain control input is a differential signal from 0 V to 0.9 V which varies the gain from 11.6 dB to 46.5 dB.

VCL+ and VCL– provide inputs that limit the output voltage swing of the amplifier.