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PCB Designbi_tool~8 mins

Differential pair routing basics in PCB Design - Dashboard Guide

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Dashboard Mode - Differential pair routing basics
Goal

Understand how differential pair routing affects signal quality and timing in PCB design.

Sample Data: PCB Trace Measurements
Trace IDLength (mm)Impedance (Ohms)Skew (ps)Signal Integrity Score
DP15090595
DP25292890
DP34889497
SP150452070
SP253472268
SP349441872
Dashboard Components
  • KPI Card: Average Skew for Differential Pairs
    Formula: AVERAGE(Skew) for Trace ID starting with 'DP'
    Result: (5 + 8 + 4) / 3 = 5.67 ps
  • KPI Card: Average Signal Integrity Score for Differential Pairs
    Formula: AVERAGE(Signal Integrity Score) for Trace ID starting with 'DP'
    Result: (95 + 90 + 97) / 3 = 94
  • Bar Chart: Signal Integrity Score by Trace ID
    Shows signal quality comparison between differential pairs (DP) and single-ended pairs (SP).
  • Line Chart: Skew by Trace ID
    Visualizes timing difference for each trace.
  • Table: Detailed Trace Data
    Shows all columns from sample data for reference.
Dashboard Layout
+----------------------+----------------------+
| Avg Skew (DP)        | Avg Signal Integrity  |
| 5.67 ps              | 94                   |
+----------------------+----------------------+
|                      Bar Chart: Signal Integrity Score          |
| +------------------------------------------------------------+ |
|                                                              |
+--------------------------------------------------------------+
|                      Line Chart: Skew by Trace ID             |
| +------------------------------------------------------------+ |
|                                                              |
+--------------------------------------------------------------+
|                      Table: Detailed Trace Data              |
| +------------------------------------------------------------+ |
|                                                              |
+--------------------------------------------------------------+
Interactivity

A filter allows selecting Trace Type: Differential Pair (DP) or Single-Ended Pair (SP).

When the filter changes:

  • KPI cards update to show averages for the selected trace type.
  • Bar and line charts update to show only traces of the selected type.
  • The detailed table filters rows accordingly.
Self Check

If you add a filter to show only Differential Pairs (Trace ID starting with 'DP'), which components update?

  • Both KPI cards update to show averages only for DP traces.
  • Bar chart shows signal integrity scores only for DP traces.
  • Line chart shows skew only for DP traces.
  • Table shows only DP trace rows.
Key Result
Dashboard shows signal quality and timing metrics comparing differential and single-ended PCB traces.