SNAA311A September   2017  – September 2020 LMK00301 , LMK00308 , LMK03328 , LMK04803 , LMK04832 , LMK1C1104 , LMK61E2

 

  1.   Trademarks
  2. 1Introduction
  3. 2Clock Tree
  4. 3Summary and Conclusion
  5. 4Revision History

3 Summary and Conclusion

  • The TI LMK series of Clock devices offer excellent additive jitter performance throughout the entire clock chain – which are ideally suited for ultrasound applications.

  • The end-to-end jitter is well within the required limits of TI's high performance AFEs to achieve optimal performance. This low end-to-end jitter of TI’s clock devices ensures system designers get the maximum performance while also providing sufficient headroom for other factors like supply noise or coupling that might degrade the clock performance.
  • For typical ultrasound applications it is possible to achieve low noise clocking by ensuring very low reference clock phase noise and edge jitter.
  • With the introduction of JESD204B AFE (AFE58JDxx) and ADC (ADS52J90), the dual-loop jitter cleaner/clock generator LMK04832 is JESD204B-compliant and meets the stringent phase noise and jitter requirements of the new AFE/ADC parts with sufficient margin. The systems designed with the LMK04832 provide additional benefits such as:
    1. Low 1-kHz close-in phase noise
    2. Better VCO noise performance ensures lower noise floor
    3. Higher phase detector operating rates that further reduce PLL noise
    4. Integrated LDOs