SBOSAA3A July   2024  – November 2024 TRF1108

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
      2. 6.3.2 DC-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 Curve
    3. 7.3 Power Supply Recommendations
      1. 7.3.1 Single-Supply Operation
      2. 7.3.2 Dual-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

7.2.1 RF DAC Buffer Amplifier

A common application of the TRF1108 is to function as a buffer amplifier for an RF DAC, such as the DAC39RF10 or AFE7950, which have differential outputs. Conventionally, passive baluns are used to interface with RF DACs as a result of the low-availability of high-bandwidth, linear amplifiers that support differential-to-single-ended conversion. The TRF1108 is a differential-to-single-ended amplifier that has excellent gain and phase imbalance, input and output return loss, and exceeds the performance of bulky and expensive passive baluns for D2S applications. The TRF1108 integrates the functionality of a wide-band passive balun and gain-block in a single 2mm × 2mm package, reducing PCB area for high-channel-count systems.

The following figure shows the schematic, where the TRF1108 is used as a D2S DAC buffer amplifier.

TRF1108 Interfacing With an RF DAC Figure 7-1 Interfacing With an RF DAC