Datasheet

Quick Start Guide AD9122-EBZ
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- If the AD9122 evaluation board has been recognized by the PC, AD9122 should be populated in the Evaluation Board field in
the Hardware Config panel.
- Generate a sinewave by pulling down the “Add Generated Waveform” menu and choosing “Single Tone”. Fill in the form as
shown in Figure 3 (Sample Rate = 250MHz, Desired Frequency = 29 MHz, etc.). Note that the Sample Rate should match the
input sample rate and not the DAC update rate.
- Select the I and Q data vectors in the data selection panel.
- Launch the AD9122 SPI GUI by clicking the AD9122 SPI button. Got to the “Data Clock” tab and change the Interpolation field
to “2x”.
- When the Run button is clicked, the SPI controller will run once. It will both write and read from the AD9122/AD9125 and
setup the clock chip (AD9516) on the evaluation board. The Run Forever control will setup both the AD9122/AD9125 and
AD9516. This mode of operation will continue to read from the chip and will update the SPI when any of the controls change.
The Force Write and Read Only controls force the controller to write all the controls to the evaluation board or only read from
the SPI port.
- The DCO frequency field in the DPGDownloader window should now be reading something close to 250MHz.
- Next hit the download
button. This transfers the data from the PC to the DPG memory.
- When the vector has finished downloading, hit the play
button. This starts the DPG2 transmitting data to the eval board.
- The output from J7 and J8 should be a clean 29MHz tone as shown below: