Tool/software: Linux
Hello folks!
We have DAC37J82 chip and try to configure it to work properly under following conditions: FIF=150 MHz, Fdac=1600 MSPS, 8x interpolation, 0 dBFS digital input, LMF=821, PLL is disabled.
We expected to get the same or close to single tone spectral plot as given in DAC37J82.pdf (revised may 2014). You can find it on figure 11 on page 15 of mentioned document. According to the document, SFDR in our case is typically 72 dBc, but the picture from the DAC output we have is a little bit different. Spectral plot we’ve got contains useful tone at FIF(150 MHz) with 0 dBc level as well as strong tone at FIF*2 (300 MHz) with its level approximately 20 dBc. We guess that something wrong with configs we send to the DAC, but we steel can’t find the correct one. So the question is how to configure the DAC to achieve the same result as one given in official document?
Thank you in advance!