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?