SBOSAA9B March   2023  – December 2024 TRF0208-SEP

PRODMIX  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  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. 7.2.1.3 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 Third-Party Products Disclaimer
    2. 8.2 Documentation Support
      1. 8.2.1 Related Documentation
    3. 8.3 Receiving Notification of Documentation Updates
    4. 8.4 Support Resources
    5. 8.5 Trademarks
    6. 8.6 Electrostatic Discharge Caution
    7. 8.7 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

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 RXA channel that is matched to center frequency of 2.3GHz.

Table 7-2 Component Values of RX Chain With Center Frequency = 2.3GHz
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
INM term R82 Resistor 50Ω Install
Attenuator R74 Resistor 10Ω Install
Attenuator R70 Resistor 10Ω Install
Attenuator R69 Resistor 10Ω Install
Attenuator R67 Resistor 10Ω Install
Attenuator R71 Resistor 120Ω Install
Attenuator R68 Resistor 120Ω Install
Matching C91 — — 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 L20 Inductor 5.6nH Install
Matching C97 Capacitor 3.9pF Install
Matching C88 Capacitor 3.9pF Install
Matching C92 — — Do not install