I believe the 100-ohm differential equates to 50-ohm single ended because you can think of the two 100-ohm impedances as being in parallel resulting in an effective 50-ohm single-ended equivalence.
FWIW, the calculator I've used in the past is called Polar SI8000 which apparently has been superceded by Speedstack PCB.
If you want to keep the capacitors and inductors for differential routing to optimize the power transfer, page 16 of the datasheet shows some formulas that "provide good starting values" for these components... I need to know the passive component values to match the different impedances in the schematic.It's the transmission line impedance measured against ground when connecting both wires in parallel, it's another parameter that characterizes a differential transmission line besides differential impedance.The lowest value is achieved with a differential pair comprosed of two uncoupled single ended lines as you intend.I took a quick look at the datasheet, and there's several pages explaining the matching requirements--too much for me to wade through in a few minutes, but maybe you can work it out with some careful reading.You need to use an impedance calculator tool to figure out the geometry for routing your differential pairs.
50 ohm single ended vs 100 ohm differential
Another question: I also have to transmit a 160MHz single ended clock from the FPGA via the same cable to the sensor.The setting is as follows: FPGA = 3cm to receiver How should I route and terminate the wire?So now I'm planing to use this one: https:// My questions: 1) Is this 50-Ohm cable really usefull for my application?If yes: 2) What Pin-assingment scheme I should use?You would need to add an appropriate sized "stub resistance" at a carefully chosen location along the transmission path using engineering tools like a Smith Chart.
Stuff like that is really only practically applicable over "large" distances with respect to the wavelength though.My idea is to route the 160MHz clock with 50-ohm on the two PCBs (FPGA board; Sensor board).Then terminate the track close to the FPGA (50ohm in series) and again close to the clock driver (50ohm in series): FPGA = I presume it's well defined technical term related to differential transmission lines.Hi there, I'm using a sensor with 16 LVDS pairs @160MHz.I have to transmit this data to an FPGA (Altera) via a 20cm cable.