One of my customer is investigating AD9739 High-Speed DAC for his new system.
He made 8 prototype board and 6 board out of 8 shows noisy output as shown attached scope shot.
When RESET terminal set to “Hi”, the noisy output become clean. And the RESET is set to “Lo”, the output become noisy again.
Cond you advise us what is wrong in his test?
Is there any soldering problem anticipated for this BGA package?
Thank you for your help,