JAJSNJ7A March   2023  – June 2024 TRF0208-SEP

ADVANCE INFORMATION  

  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
    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
      1. 6.3.1 Fully-Differential Amplifier
      2. 6.3.2 Single Supply Operation
    4. 6.4 Device Functional Modes
      1. 6.4.1 Power Down Mode
  8. 7 Application and Implementation
    1. 7.1 Application Information
      1. 7.1.1 Driving a High-Speed ADC
      2. 7.1.2 Calculating Output Voltage Swing
      3. 7.1.3 Thermal Considerations
    2. 7.2 Typical Applications
      1. 7.2.1 TRF0208-SEP in Receive Chain
        1. 7.2.1.1 Design Requirements
        2. 7.2.1.2 Detailed Design Procedure
    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 サード・パーティ製品に関する免責事項
    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
    1. 10.1 Package Option Addendum
    2. 10.2 Mechanical Data

7.2.1.2 Detailed Design Procedure

The TRF0208-SEP is configured as an S2D amplifier. The section close to TRF0208-SEP output is an attenuator pad that is meant for robust matching. The section close to the AFE7950-SEP is the matching network for the AFE7950-SEP ADC input that is channel dependent. The matching components are chosen based on the AFE7950-SEP return-loss data and some final optimization because the manufactured board parameters can influence the exact component values needed.

Table 7-2 shows the bill of materials (BOM) values of the design for a channel that is matched to center frequency of 8.2GHz.

Table 7-2 Component Values of RX Chain With Center Frequency = 8.2GHz
SECTION DESIGNATOR TYPE VALUE INSTALL OR DO NOT INSTALL
DC block cap C117 Capacitor 100nF Install
DC block cap C115 Capacitor 100nF Install
DC block cap C111 Capacitor 100nF Install
DC block cap C122 Capacitor 100nF Install
Attenuator R74 Resistor 10Ω Install
Attenuator R70 Resistor 10Ω Install
Attenuator R69 Resistor 10Ω Install
Attenuator R67 Resistor 10Ω Install
Attenuator R71 Resistor 140Ω Install
Attenuator R68 Resistor 140Ω Install
INM term R82 Resistor 50Ω Install
Matching C91 — — Do not install
Matching L20 — — Do not install
Matching C103 — — Do not install
Matching C83 — — Do not install
Matching L22 Inductor 0.1nH Install
Matching L18 Inductor 0.1nH Install
Matching C96 Inductor 0.1nH Install
Matching C87 Inductor 0.1nH Install
Matching C97 Capacitor 0.8pF Install
Matching C88 Capacitor 0.8pF Install
Matching C92 Inductor 0.3nH Install