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

4.2 CISPR-32 Results

Note: Spectrum Overview plots represent both horizontal and vertical measurements
Table 4-1 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

X-Axis


Variant 3 LMK3C0105-Q1 3.3V X-Axis Spectrum Overview

Figure 4-4 Variant 3 LMK3C0105-Q1 3.3V X-Axis Spectrum Overview

Variant 4 Competitor Oscillator 3.3V X-Axis Spectrum Overview

Figure 4-5 Variant 4 Competitor Oscillator 3.3V X-Axis Spectrum Overview

Y-Axis


Variant 3 LMK3C0105-Q1 3.3V Y-Axis Spectrum Overview - Horizontal

Figure 4-6 Variant 3 LMK3C0105-Q1 3.3V Y-Axis Spectrum Overview - Horizontal

Variant 3 LMK3C0105 3.3V Y-Axis Spectrum Overview - Vertical

Figure 4-7 Variant 3 LMK3C0105 3.3V Y-Axis Spectrum Overview - Vertical

Variant 4 Competitor Oscillator 3.3V Y-Axis Spectrum Overview

Figure 4-8 Variant 4 Competitor Oscillator 3.3V Y-Axis Spectrum Overview

Z-Axis


Variant 3 LMK3C0105-Q1 3.3V Z-Axis Spectrum Overview

Figure 4-9 Variant 3 LMK3C0105-Q1 3.3V Z-Axis Spectrum Overview

Variant 4 Competitor Oscillator 3.3V Z-Axis Spectrum Overview

Figure 4-10 Variant 4 Competitor Oscillator 3.3V Z-Axis Spectrum Overview
Table 4-2 Competitor Oscillator vs. LMK3C0105-Q1 with 3.3V Supply - JB3 - Z-Axis
Frequency (MHz) Competitor Oscillator (dBuV/m) LMK3C0105-Q1 Var 3 (dBuV/m) TI Delta
75 12.34 -1.71 -14.05
150 1.38 -1.55 -2.93
225 5.24 -3.01 -8.26
250 6.40 -0.57 -6.97
275 6.71 0 -6.72
300 9.92 1.76 -8.16
325 10.20 10.41 +0.21
350 6.76 5.13 -1.63
475 8.09 14.44 +6.35
675 10.82 26.91 +16.09
725 9.81 38.94 +29.12
775 9.66 26.33 +16.66
825 9.54 23.18 +13.63
975 11.55 25.73 +14.18