Other Parts Discussed in Thread: CDCE62005, DAC34H84
Hi,
I am configuring DAC34H84 EVM with CDCE62005 as a DACCLK source.
1. My question is that whenever I configure CDCE62005 through GUI software, it seems to be it is not getting stored in ROM, whenever the board is powered up, the previous configuration is lost. I have also tried configuring with EEPROM locked/unlocked option but no luck. Is there a way to keep the configuration save so that I don't have to do it again every time the board is powered up.
2. With the default configuration, The output frequency of CDCE62005 (DACCLK/DACCLKC) is not stable it gives sometimes 150MHz, sometimes 140Mhz, 130MHz, and it keeps on changing because of which I am getting a lot of noise in the DAC output. Is it normal?
3. Can I use external clock as a DACCLK source through bypassing the CDC clock generator IC. From schematics I found two connectors J22 and J23 for external clock on the EVM board. Also on the board R124 and R125 are not installed, should I install them and use external clock? Also on R124 and R125 DNI(Do not install) is written, If R124 and R125 is not supposed to be installed, should I bypass them otherwise what's the reason of including them?
4. In case of external clock what should be the amplitude (voltage peak to peak) and what should be the value of R124 and R125?
