SLOSED6 December   2025 TRF0108-SEP

PRODUCTION DATA  

  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 AC-Coupled Configuration
    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 Thermal Considerations
    2. 7.2 Typical Application
      1. 7.2.1 RF DAC Buffer Amplifier
        1. 7.2.1.1 Design Requirements
        2. 7.2.1.2 Detailed Design Procedure
        3. 7.2.1.3 Application Performance Plots
    3. 7.3 Power Supply Recommendations
      1. 7.3.1 Single-Supply Operation
    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 Documentation Support
      1. 8.1.1 Related Documentation
    2. 8.2 Receiving Notification of Documentation Updates
    3. 8.3 Support Resources
    4. 8.4 Trademarks
    5. 8.5 Electrostatic Discharge Caution
    6. 8.6 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information
    1. 10.1 Mechanical Data

7.2.1.2 Detailed Design Procedure

Select an RF DAC such as the DAC39RF10-SEP for this application because the DAC supports sampling at 10GSPS and the required RF signal frequency range of 4GHz. The DAC39RF10-SEP outputs a signal level of –0.4dBm at 2GHz when operated at –1dBFS. The TRF0108-SEP has a gain of 15.2dB and OP1dB of 11.4dBm at 2GHz; therefore, add an 8.8dB attenuator pad at the output of the DAC to get 6dBm output power. A 5GHz low-pass filter can optionally be added to reject the DAC images in the second Nyquist zone. From the TRF0108-SEP specifications, the device meets the design requirement of output return loss.

Table 7-2 shows the component values for attenuator and low-pass filter for the design.

Table 7-2 Component Values for Attenuator and Low-Pass Filter for the DAC39RF10-SEP Interface
SECTIONDESIGNATORTYPEVALUE
AttenuatorR1Resistor24Ω
AttenuatorR2Resistor80Ω
AttenuatorR3Resistor24Ω
Low-pass filterC1Capacitor0.5pF
Low-pass filterC2Capacitor0.8pF
Low-pass filterC3Capacitor0.5pF
Low-pass filterL1Inductor2nH
Low-pass filterL2Inductor2nH