SBAK043 April   2026 DAC39RF10-SP , DAC39RFS10-SP

 

  1.   1
  2.   2
  3.   Trademarks
  4. 1Introduction
  5. 2Single-Event Effects
  6. 3Device and Test Board Information
  7. 4Irradiation Facility and Setup
  8. 5Test Setup and Procedures
  9. 6Single-Event Latch-Up (SEL) Results
  10. 7Single-Event Functional Interrupt (SEFI) Results
    1. 7.1 Converter Performance and Digital (DUC + JESD204C Link) Hardness
    2. 7.2 Configuration Register Hardness
    3. 7.3 SPI Programming During Irradiation
  11. 8SEU Results
    1. 8.1 JESD204C Link Monitoring Results
    2. 8.2 Digital Up-Converter and NCO Upset Recovery
    3. 8.3 Estimating Upset Rates in Unprotected Data Paths
    4. 8.4 Event Rate Calculations
    5. 8.5 Summary of Radiation Hardness
  12. 9References
  13.   A Appendix: Recommendations for Hi-Rel Systems
    1.     A.1 Summary of Rad-Hard Design Features
    2.     A.2 SPI Programming
    3.     A.3 JESD204C Reliability
    4.     A.4 Equalizer Usage in Radiation Environments
    5.     A.5 NCO Reliability
    6.     A.6 NCO Frequency and Phase Correction (Strategy #1)
    7.     A.7 NCO Frequency Correction (Strategy #2)
    8.     A.8 NCO Self-Sync/Self-Coherent Mode (Strategy #3)

JESD204C Link Monitoring Results

The JESD204C receiver is a critical aspect of the DAC39RF10-SP, as this is how massive amounts of digital data are transmitted from the FPGA (or other logic device) to the DAC. During all beam runs, we were unable to observe any link-down events or ‘missing’ or ‘muted’ tones while monitoring the DAC output using the ADC12DJ5200RFEVM with HSDCPRO set up in continuous-capture mode. However, link-down alarm sticky bits were thrown during runs. This indicates that any link-down event that occurred auto-recovered, and without user intervention. In the tested 64b/66b encoding mode, this recovery time is nearly instant. In 8b/10b encoding mode (sometimes referred to as JESD204B), which was not tested, the DAC’s SYNCb signal is used to reset the transmitter and the time to bring the link back up depends on the user’s implementation of the protocol.