SBASA53A July 2021 – October 2024 ADC09DJ800-Q1 , ADC09QJ800-Q1 , ADC09SJ800-Q1
PRODUCTION DATA
The clocking subsystem is largely responsible for achieving multi-device synchronization and deterministic latency. The device uses the JESD204C subclass-1 method to achieve deterministic latency and synchronization. Subclass 1 requires that the SYSREF signal be captured by a deterministic clock (CLK± or SE_CLK) edge at each system power-on and at each device in the system. This requirement imposes setup and hold constraints on SYSREF relative to CLK±, which can be difficult to meet at giga-sample clock rates over all system operating conditions. The device includes a number of features to simplify this synchronization process and to relax system timing constraints: