DAC39J82：DAC39J82 JESED204B CAN'T successful LINK

chen bo

Prodigy 30 points

Part Number: DAC39J82
Other Parts Discussed in Thread: LMK04828

i use a DAC39J82 , LMFS=4211,the config:

but the JESD204B NOT LINK, the sync always re-link:

the config register 0x64~0x7 data was 0x0509,the bit config :

what should i do what to solve the problem?

and i want to get a example config register,LMFS=4211, USE LMK04828 generate 1250M dac clk, use dac a and dac c to generate single.

over 2 years ago

0 jim s over 2 years ago

TI__Guru* 91947 points

Chen,

Your example above has the DAC clock running at 2500Msps. If you want this clock at 1250Msps, change the interpolation factor to 1. To get an output on CHA and CHC, use the setup shown in the second slide of the attached document. The register settings for this setup is attached. This is using the LMK in clock distribution mode with an external 1250MHz clock connected to CLKIN1 input of the LMK04828.

Regards,

Jim

DAC39J82_4211_1250_Fs_CHA_CHC_output.pptx DAC39J82_4211_1250_Fs_CHA_CHC_output.cfg