SNAA447 May   2025 LMK00334 , LMK00338

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Test Setup
  6. 3Test Procedure
  7. 4Explanation of TI's PCIe Compliance Tool
  8. 5LMK0033x Test Results
    1. 5.1 LMK0033x Test Results Summary
    2. 5.2 PCIe Tool Input File Waveforms for the LMK0033x Family
    3. 5.3 LMK0033x Detailed Jitter Measurements
  9. 6Summary
  10. 7References

5.1 LMK0033x Test Results Summary

Table 5-1 is the PCIe compliance results summary for the LMK0033x phase noise analysis, which demonstrates the jitter compliance of the device for PCIe Gen 1 through 7, noise folds 0 and 3, and clock architectures Common Clock (CC) and Separate Reference No Spread (SRNS).

A PCIe jitter spec or time domain calculation can have one of the following statuses:

  • PASS: within specifications/limits
  • FAIL: outside specifications/limits
  • N/A: no specifications/limits available
Table 5-1 LMK0033x PCIe Tool Test Results Summary - Frequency Domain
Jitter Filter Clock Arch. Noise Fold Min (fs) Max (fs) Limit (fs) Status
PCIe1 CC 0 0.0 96.3 86,000 PASS
3 0.0 112 86,000 PASS
SRNS 0 N/A N/A N/A N/A
3 N/A N/A N/A N/A
PCIe2 CC 0 28.3 86.1 3,100 PASS
3 33.1 102 3,100 PASS
SRNS 0 37.9 96.4 N/A N/A
3 43.5 111 N/A N/A
PCIe3 CC 0 9.19 25.7 1,000 PASS
3 10.9 30.5 1,000 PASS
SRNS 0 10.9 29.4 N/A N/A
3 12.7 34.5 N/A N/A
PCIe4 CC 0 9.19 25.7 500.0 PASS
3 10.9 30.5 500.0 PASS
SRNS 0 10.9 29.4 N/A N/A
3 12.7 34.5 N/A N/A
PCIe5 CC 0 2.07 10.6 150.0 PASS
3 2.49 12.8 150.0 PASS
SRNS 0 2.38 11.9 N/A N/A
3 2.79 14.0 N/A N/A
PCIe6 CC 0 0 6.53 100.0 PASS
3 2.73 7.78 100.0 PASS
SR 0 3.21 9.06 N/A N/A
3 3.71 10.5 N/A N/A
PCIe7 CC 0 1.60 4.58 67.0 PASS
3 1.91 5.46 67.0 PASS
SR 0 2.24 6.37 N/A N/A
3 2.60 7.37 N/A N/A

Table 5-2 is the PCIe compliance summary for the LMK0033x time domain analysis which demonstrates the time domain compliance of the device.

Table 5-2 LMK0033x PCIe Tool Test Results Summary - Time Domain
Calculation Min Avg Max Limit Status
Vcross 330.09mV 343.67mV 357.31mV 250mV to 550mV PASS
Vhigh 758.527mV 758.527mV 150mVmV PASS
Vlow –42.394mV –42.394mV –150mVmV PASS
Period 9.971ns 10.0ns 10.022ns 9.847ns to 10.203ns PASS
Duty Cycle 49.441% 49.624% 49.825% 40% to 60% PASS
Overshoot Voltage 72.83mV 91.34mV 300mV PASS
Undershoot Voltage –57.47mV –70.69mV –300mV PASS
Rising Edge Rate 2.14V/ns 2.419V/ns 2.718V/ns 0.6V/ns to 4.0V/ns PASS
Falling Edge Rate 2.24V/ns 2.508V/ns 2.818V/ns 0.6V/ns to 4.0V/ns PASS