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

3.2.1 Monopole

Table 3-3 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

Variant 3 LMK3C0105-Q1 3.3V Spectrum Overview - Monopole

Figure 3-7 Variant 3 LMK3C0105-Q1 3.3V Spectrum Overview - Monopole

Variant 4 Competitor Oscillator 3.3V Spectrum Overview - Monopole

Figure 3-8 Variant 4 Competitor Oscillator 3.3V Spectrum Overview - Monopole
Table 3-4 Average Spur Level - Competitor Oscillator vs. LMK3C0105-Q1 with 3.3V Supply - Monopole
Frequency (MHz) Competitor Oscillator (dBuV/m) LMK3C0105-Q1 (dBuV/m) TI Delta
1.3 5.08 12.38 +7.30
2.6 1.85 7.08 +5.28
25 17.20 17.17 -0.03

Variant 3 LMK3C0105-Q1 1.8V Spectrum Overview - Monopole

Figure 3-9 Variant 3 LMK3C0105-Q1 1.8V Spectrum Overview - Monopole

Variant 4 Competitor Oscillator 1.8V Spectrum Overview - Monopole

Figure 3-10 Variant 4 Competitor Oscillator 1.8V Spectrum Overview - Monopole
Table 3-5 Average Spur Level - Competitor Oscillator vs. LMK3C0105-Q1 with 1.8V Supply - Monopole
Frequency (MHz) Competitor Oscillator (dBuV/m) LMK3C0105-Q1 (dBuV/m) TI Delta
25 13.73 12.20 -1.53