Part Number: DAC38RF83
My application needs a Carrier Freq of 1030MHz and we are currently looking into the DAC38RF83/90.
We are trying to understand where the Carrier is generated. Is it the NCOs that set the Carrier Quadrature signals?
Please let me know how the Carrier is generated (or induced) and difference between CMIX and FMIX in the Complex Mixer block.
How do I set the Carrier Freq to 1030MHz? If with NCO bits, can you please show the math?
When using the DAC38RF8x you will send a complex digital signal representing your baseband signal. The RF DAC will up-convert the signal through the digital modulator to your RF band of choice set by the NCO (numerically controlled oscillator). The equation for determining the NCO word for programming is dependent on sampling rate and is outlined in section 184.108.40.206 of the datasheet.
Using the NCO (FMIX mode) allows arbitrary placement of the signal in the RF band. You can also use the CMIX (coarse mixer) which is limited to N*Fs/8 frequencies for the oscillator. The CMIX offers a bit lower power consumption but sacrificing flexibility.
We are glad that we were able to resolve this issue, and will now proceed to close this thread.
If you have further questions related to this thread, you may click "Ask a related question" below. The newly created question will be automatically linked to this question.
All content and materials on this site are provided "as is". TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right. No license, either express or implied, by estoppel or otherwise, is granted by TI. Use of the information on this site may require a license from a third party, or a license from TI.
TI is a global semiconductor design and manufacturing company. Innovate with 100,000+ analog ICs andembedded processors, along with software, tools and the industry’s largest sales/support staff.