I need a Sawtooth frequency waveform for FMCW RADAR working in 5.8GHz and sweep between 5700MHz to 5900MHz.
Please recommend a DDS Solution to me. Thanks.
Unfortunately, we do not have a DDS that works at 5.8GHz.
We only have the AD9914 DDS that works at 3.5GHz with maximum output frequency of 1.75GHz.
1.Can AD9914 produce a sawtooth frequency waveform for FMCW RADAR?
2.What is the Mini lock time that AD9914 can reach?
3.I find AD9164 on ADI Website and it is a 16-bit, 12GSPS, RF DAC and DDS. Can you help to check if AD9614 can meet my requirement or not?
(My requirement: a Sawtooth frequency waveform for FMCW RADAR working in 5.8GHz and sweep between 5700MHz to 5900MHz.)
I do not think the AD9164 has the sweep functionality you are seeking.
The AD9914 could do this using Nyquist images and a band-pass filter at the output, this will naturally result in a lower power fundamental and worse SFDR, you'll have to determine whether or not the performance you could achieve would be sufficient.
Note when you call out a sawtooth frequency profile - the output of the DDS is inherently a sinewave, I am assuming you are needing the frequency to vary over time in a saw tooth manner, which the AD9914 can do.
I think danf can help you with the AD9164.
You can do this on the AD9164 if you use the SERDES interface and create the frequency sweep in your digital device. You would then transfer that signal across the data interface and use the NCO to shift it to the correct frequencies. There is no sawtooth sweep function on the AD9164.
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