Why do some designs call for 0 ohm resistors and not a jumper? What is the advantage of using a 0 ohm resistor?
they are basically the same thing.
in mass production a auto insertion machine which can insert a resistor
can also insert a jumper. It is just easier integration
for board design and production
or board designs that are adaptable to different units
can bypass certain design functions depending on revisions
in mass production a auto insertion machine which can insert a resistor
can also insert a jumper. It is just easier integration
for board design and production
or board designs that are adaptable to different units
can bypass certain design functions depending on revisions
It is a piece of wire with a ceramic body added to avoid reprogramming pick and place robotic arm, nothing further.
There are 0 ohm resistors with standard SMD resistor footprints. You can just place those in a PCB design like you would place a normal SMD resistor, I find that more convenient than placing holes for a wire. I normally only use 0 ohm resistors when I want to be able to choose between different options by mounting some of them and not mounting others.
I've started to use them instead of wire bridges with or without via's. Not 0 ohm. In lower frequency digital circuitry you can use low resistance values like under 10 ohm or so in 1206 or 0805 for signal tracks. 0603 are to small to have a copper track reliably underneath .
Many times cheaper, less board area, if we are talking SMD. For through-hole its also probably a cost thing - lose one stage in manufacture by replacing all wire links by 0-ohm resistors, you're going to need the resistor-stuffing robot anyway.