[FAQ] The What and How of TI DPLLs (What is a DPLL? How does a DPLL work?)

Covers topics such as...

• Basic overview of APLL
• Basic overview of DPLL.
• How the TI DPLL works by modulating the APLL numerator.
• DPLL comparison (LMK5xxxxx) to Jitter cleaners (LMK04xxx).
• Frequency stability intro
• Basic coverage of features such as
  • Cascading PLLs for to support frequency lock of non-integer related clocks (like a fractional divider)
  • Zero delay mode (ZDM).  Programmable offset phase determinism
  • DPLL reference "Input validation"
  • Holdover
  • Hitless switching.
  • APLL and DPLL DCO
  • Clock output formats
• Advanced topics
  • Measuring phase error from TDC
  • Measuring loop back time
  • Measuring input reference PPM

73,
Timothy