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DAC3283: Help on DAC3283 usage

Part Number: DAC3283
Other Parts Discussed in Thread: DAC9881


I'd like to use DAC3283 for DDS, but I'm not very experienced with these high speed DACs, so if anybody could help that would be great.

1. I plan to generate a variable frequency, about 32KHz sine. I know it's very low for this DAC but I thought the high sampling rate could reduce filter needs to produce a very clean wave. I also have a DAC 9881 available, I suppose with 5us settling I could sample at 200KHz (maybe more, regardless of settling time?) . Is using DAC3283 a good idea? I'd like to get the cleanest output possible, phase should also be linear with respect to frequency.

2. DAC3283 datasheet shows the use of a clock generator IC. I've bought CDCM6208, but is its use mandatory or may I just use the FPGA clock?

3. I plan to have DC output, and I've read on another thread here that I should use a voltage reference (the thread says 3.3V) and a 25ohm resistor on both IOUTX1 and IOUTX2 pins, then there should be two correlated, complementary outputs. Is this correct?

Best regards,


  • Hello,

    1. This depends on your application. If your application requires higher accuracy and good settling time in time domain applications, then the DAC9881 is a better choice. The DAC3283 is designed for wireless products and has good performance in the frequency spectrum, but not necessarily the DNL/INL, settling time, etc performance. 

    another thing to consider is the latency. The DAC3283 is a LVDS bus based DAC, and require FPGA to drive the input

    2. You will need to clock from clock synthesizer with good phase noise performance

    3. Please follow the DAC output compliance voltage requirement to ensure good bias at the DAC output