SNAA416A April   2025  – June 2025 LMK3C0105-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Test Setup
    1. 2.1 Board Variation Summary Table
    2. 2.2 Schematics
    3. 2.3 Layouts
    4. 2.4 Stack-Up
  6. 3CISPR-25
    1. 3.1 CISPR-25 Summary
    2. 3.2 CISPR-25 Results
      1. 3.2.1 Monopole
      2. 3.2.2 Bi-Conical
      3. 3.2.3 Log-Periodic
      4. 3.2.4 Horn
  7. 4CISPR-32
    1. 4.1 CISPR-32 Summary
    2. 4.2 CISPR-32 Results
  8. 5Summary
  9. 6References
  10. 7Revision History

3.1 CISPR-25 Summary

At 3.3V, the LMK3C0105-Q1 with no shielding vias and 8+ in trace length passes Class 5 standards for all bands except for TV Band IV, Analouge UHF, GPS L1, and GPS L5. For best performance, use of additional GND vias and SSC is recommended.

At 1.8V, the LMK3C0105-Q1 with no shielding vias and 8+ in trace length passes Class 5 standards for all bands except for TV Band IV, GPS L1, and GPS L5. For best performance, use of additional GND vias or SSC is highly recommended.

Table 3-2 Board Variation Summary Table
Board Variant Device Trace Routing Shielding Vias Clock Layer Trace Length
1 LMK3C0105-Q1 Immediate Termination No L1 66mil
2 LMK3C0105-Q1 Immediate Branch Out Yes (400mil spaced array) L6 9 - 12in
3 LMK3C0105-Q1 Immediate Branch Out No L6 9 - 12in
4 Competitor Oscillator Immediate Termination No L1 66mil

CISPR-25 - 3.3V Supply - Summary Table

Figure 3-3 CISPR-25 - 3.3V Supply - Summary Table

CISPR-25 - 3.3V Supply - With -0.5% SSC - Summary Table

Figure 3-4 CISPR-25 - 3.3V Supply - With -0.5% SSC - Summary Table

CISPR-25 - 1.8V Supply - Summary Table

Figure 3-5 CISPR-25 - 1.8V Supply - Summary Table

CISPR-25 - 1.8V Supply - With -0.5% SSC - Summary Table

Figure 3-6 CISPR-25 - 1.8V Supply - With -0.5% SSC - Summary Table