AD9753EVB

how to connect AD9753 evb to DPG3

  • 0
    •  Analog Employees 
    on Jul 14, 2020 8:34 PM

    Hello,

    Here is a procedure for testing the board with DPG2.  Hopefully, this will help provide some guidance although your test equipment will likely be different.

    Del

    Evaluation Board Test Procedure for AD9751/53/55 Rev C

    Jumper Settings JP1, JP4, JP10-IN also JP2, JP3, JP6–DF, JP5-RESET, JP7–IN PLL, JP8 & 9-L

    Hardware Setup

    1. Connect DVDD, CLKVDD and AVDD only to power supply 3.3 volts.
    2. Connect Port 1 and Port 2 of evaluation board to ribbon cables from the right and left side of CMOS DAC/DPG2 INTERFACE 012816 Rev. A Board.
    3. Connect HP8644A Synthesized Signal Generator output to LeCroy 9210 Pulse Generator Square wave generator External Input.
    4. Set HP8644A Synthesized Signal Generator frequency to 100 MHz at an amplitude of 6dBm.
    5. Use a SMA cable to connect Model 9211 Channel B OUTPUT of the LeCroy to J12 DC COUPLED LVCMOS CLOCK on DPG2.
    6. Use a SMA cable to connect Model 9211 Channel A OUTPUT of the LeCroy to J3 CLOCK on the AD9751/53/55 Rev. C Eval. Board.
    7. Set the LeCroy 9210 Channel A Frequency to 100Mhz, Vhigh…  3.3V, Vlow…  0mV, 50% Duty Cycle, 0.00ns Delay 0.90ns Leading Edge, 0.90ns Trailing Edge, 0.90ns and 2 Pulse to OFF.
    8. Set the LeCroy 9210 Channel B Frequency to 100Mhz, Vhigh… 3.3V, Vlow…  0mV, 50% Duty Cycle, 0.00ns Delay Leading Edge, 0.90ns Trailing Edge, 0.90ns and 2 Pulse to OFF.
    9. Apply power to the Eval board.

    Software Setup

    1. Select DPG Downloader
    2. Add Generated Waveform.
    3. Select Single Tone – Type in Sample Rate 100M for 100 MHz – Desired Frequency – Type 20M for 20 MHz
    4. Select Generate Complex Data (I & Q)
    5. Default is Unsigned Data selected
    6. DAC Resolution 16 bits
    7. DPG2 Unit 1 field select Generic, LVCMOS-3.3V (SMA) as Port Configuration, Multi-DPG Sync: Single
    8. In Data Playback choose 2 Independent Vectors

    Load I Data Vector 1I: Single Tone – 20.001 MHz; 0.0dB; 0.0* (In-Phase)

    1. Hit Download Vector button (down arrow) and then hit arrow pointing east to Run/Play.

     

    Verification

    1. Set Spectrum Analyzer Start Freq. = 100 KHz, Stop Freq. = 50 MHz, Ref Level 0dBm, SWT = 1.7 s, RBW = 30kHz, VBW = 30kHz.
    1. At J5 IDIFF check fundamental is at ~20 MHz with an amplitude close to ~ -6dBm. The spectrum should have a  noise floor at around -70 dBm and a clean single tone with a few small spurs below -60MHz and an image/reflection at 40 MHz ~-55 dBm.  Check that SFDR is >