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DAC3484 output

Other Parts Discussed in Thread: DAC3484

Hello .

I am trying to give out a 5MHz sine wave through a DAC3484 using LUTs in FPGA .

I have completed the pattern checker test and programmed the input clocks and DAC clock such that no FIFO collisions occur . I am using the Single Sync Sources Mode

I have disabled PLL , QMC , NCO , Mixer and am not even doing coarse mixing . I just want to observe a peak at 5 Mhz in the Frequency spectrum when I send out the Sine wave .

But , FIFO collisions start to occur when I disable the Synchronization source to the FIFO (config32 = 0x0001) . So , I dont disable the synchronization to the FIFO or to the clock divider synchronization (which also creates FIFO collision when disabled) and just try to observe output by enabling sif_txenable . 

Is there anything wrong in what I am doing above ? Might there be any other reason to why I am not observing the correct output waveform ?

  • Hi Ananth

    I have notified the DAC3484 experts regarding this question.

    They will respond as soon as possible.

    Best regards,

    Jim B

  • Updates :

    I forgot to mention that even when the synchronization sources of the FIFO_IN and FIFO_OUT are set , I am intermittently getting one away , two away alarms but no FIFO collisions , and If I disable any of my FIFO_IN / FIFO_OUT/ clk_div sync sources , the Collision alarms go high . Any Idea has to why that might happen ??

    Even if I amplify or attenuate the input signals , I am still getting the same Pk to Pk voltage for the output signal (~700mV) . Why will this happen ? Any leads will be appreciated