PCB trace impedance matching

Download and install TINA-TI, the preferred simulator used exclusively with TI Precision Labs.

In this video we will discuss how the PCB trace characteristic impedance is
determined by its geometry.  We will see how matching the driver to trace
impedance can impact the rise time, overshoot, and ringing on digital
communications signals.  This is important because the overshoot and ringing
can create noise problems that impacts sensitive analog and, in some cases,
can even cause digital communications issues. 

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[chromatec]

Nice nuts and bolts demo of source matching into high Z. Love the quiz!

[pierrelemoine]

This has been a great series, thanks!

[PavleKolesnik]

Thank you, everything is clear and understandable.

[alonsechan]

Why does the trace length isn't a factor for the PCB trace impedance?
Isn't it that the addition of inductance will affect the overall transmission line impedance?
And thanks for the great video!

[Graham_Wideman]

6:27 "A 74LVC1G38 gate is used as the transmitter and receiver." Looks like LVC1G34 is the correct number. The '38 is 2-input NAND, but important for this video, would not show the same point at all because it has open-drain output.

[Graham_Wideman]

What the heck is going on at 9:30 ? The point is correct -- put the terminating resistor at the transmitter end. The diagram shows the 50 ohm resistor in correct and incorrect locations. But the scope traces and their captions show 20 ohm resistors, which very much waters down the argument and doesn't match the diagram. Not much point showing the "correct side" with the incorrect resistor that doesn't perform the function one wants even if in the would-be correct location.

[Icantfindabetterhandle]

I looked up 18+ content and found this. What is wrong with you.

[Chaoscommander]

Terrible Audio... Guy eating microphone? slurp slurp slurp 😂