SLVUDD5 July   2025 DAC39RF20

 

  1.   1
  2.   Description
  3.   Features
  4.   4
  5. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents (Required Equipment)
    3. 1.3 Specification
    4. 1.4 Device Information
  6. 2Hardware
    1. 2.1 Setup Procedure
      1. 2.1.1  Installing the DAC39RF20EVM Configuration GUI Software
        1. 2.1.1.1 Installing and Setting Up Vivado™ Lab Tools
      2. 2.1.2  Connect the DAC39RF20EVM and TSW14J59EVM
      3. 2.1.3  Connect the Power Supplies to the Boards (Power Off)
      4. 2.1.4  Connect the Spectrum Analyzer to the EVM
      5. 2.1.5  Turn On the TSW14J59EVM Power and Connect to the PC
      6. 2.1.6  Turn On the DAC39RF20EVM Power Supplies and Connect to the PC
      7. 2.1.7  Turn On the Signal Generators
      8. 2.1.8  Launching the DAC39RF20EVM GUI and Programming the DAC EVM - JMODE 0 (Bypass Mode)
      9. 2.1.9  Launching the DAC39RF20EVM GUI and Programming the DAC EVM - JMODE 1 (DUC Mode)
      10. 2.1.10 Configuration Example of DAC39RF20EVM in DDS Mode
    2. 2.2 Evaluation Board Details: Analog Outputs
    3. 2.3 FMC Signal Routing
  7. 3Hardware Design Files
  8. 4Additional Information
    1. 4.1 Trademarks

2.2 Evaluation Board Details: Analog Outputs

The analog output path can be configured for both a high frequency path (MTX2-183+ balun from mini-circuits) and low frequency path (MABA-011108 balun from Macom). The high frequency path is default on CHA and CHB, and the low frequency path requires some component modifications. See Table 2-2.

Each analog output path also has the ability to bypass both balun options entirely and allow the user to access the outputs differentially. To enable this feature, some components must be changed. See Table 2-3.

Table 2-2 Component Changes to Modify DAC EVM Output Paths
DAC Output ChannelComponents to RemoveComponents to Populate
CHA - Single-ended (MABA-011108)C220, C224, C221C222, C225, C223 = 0.1µF
CHA - Differential (balun bypass)R183, R186R182, R184, R187 = 0Ω
CHB - Single-ended (MABA-011108)C228, C229, C232C230, C231, C233 = 0.1µF
CHB - Differential (balun bypass)R189, R192R168, R190, R193 = 0Ω

Each analog output path has a wideband biasT on each output P/N pin to bias the outputs appropriately across the DAC supported bandwidth.

DAC39RF20EVM Analog Output Path - CHA
A. DACA output stage. By default, the MTX2-183+ balun is used for this channel (2GHz to 18GHz).
Figure 2-37 Analog Output Path - CHA
DAC39RF20EVM Analog Output Path - CHB
A. DACB output stage. By default, the MTX2-183+ balun is used for this channel (2GHz to 18GHz).
Figure 2-38 Analog Output Path - CHB