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Questions tagged [pad]

The tag has no usage guidance.

2
votes
0answers
20 views

7030 SMD LED pad configuration

I have not done a lot of work with SMD LEDs and have a question about pad layout. I have done quite a bit of research and haven't found much helpful info yet. I am working with 7030 SMD leds ...
0
votes
0answers
8 views

How can I change to metrics units in the “Pad template editor” in Altium 19?

I wonder how I can change the units in the pad template editor to metrics? I also wonder if I can change the default vias to look nicely! For me the default vias looks like this: However after ...
4
votes
2answers
418 views

Question relative to pads for capacitors - high frequency

In the article Compact sub nano second pulse generator using avalanche transistors, I read P. 874 Further, we used pads on a doublesided 0.062” FR-4 epoxy glass laminate pc-board for ...
1
vote
0answers
26 views

MCP4011 - Exposed pad - connect to GND?

I'm planning to use an MCP4011-xxx/MC (DFN version). This package has an exposed PAD. But nowhere in the datasheet, I can find the information if this exposed PAD should remain NC or tied to GND/VSS. ...
0
votes
1answer
51 views

Altium Designer: polygon pour on signal layer

I'm designing a board around 2 Texas Instruments TPS65988. In the datasheet a layout example is shown where "fins" are placed around pads to provide further thermal dissipation. A pour to create this ...
5
votes
1answer
390 views

Acute angle on a pad or a via

It is better to avoid acute angle to join two routes (depending on current direction and waveform). I often see on board acute angle with a pad or a via. Is it bad? Should it be avoided as well?
0
votes
1answer
31 views

AM437x ZDN (N491 BGA) Footprint Dimensions

I have downloaded and studied the layout that TI provides for the TMDSEVM437X AM437x Evaluation Module. After calculating some distances, I concluded that the pad size used for the ZDN footprint is 0....
0
votes
1answer
92 views

PCB Power Pad destroyed for TPS51125. Fixable?

While trying to fix a laptop, I was de-soldering a TPS51125. I added a bit too much solder to the power pad while wicking so I had the "smart" idea to use a solder pump to remove it... but the pad ...
1
vote
1answer
52 views

EAGLE - how to make ground planes to connect to the smaller PADS

I cant fid how to configure the GND polygon to connect to smaller IC pads: EDIT Following the @Dave Tweed answer the result is exactly as I need:
0
votes
1answer
96 views

Can I solder a capacitor on a lifted trace

I lifted and tore away a pad when soldering a capacitor on a PCB. The pad on the negative side is fine. Can I solder the capacitor lead onto the negative pad, and the other lead on the exposed trace ...
25
votes
6answers
5k views

Is it OK to route a trace through a pad?

Will I have any trouble routing the traces in this way? (VCC and GND) Is it OK considering that the entire circuit current is under 50mA?
1
vote
1answer
213 views

Help in Thermal PAD and glue calculation (equivalence) in shared heatsink

Hello if I have 15 chips to dissipate 1W each (thus 15W in total), by math calculation, which of the next three possibilities is better: 1) using a unique shared heatsink @1.7K/W with 0.5mm thermal ...
6
votes
3answers
715 views

Impact of increased pad length in PCB

I was wondering why I cannot edit footprint of LED 1206 to take care of LED 0805 as well so that I can mount one of them depending on the availability. To do this, I have to increase the pad size of ...
1
vote
1answer
124 views

connecting SMD pads

I recently designed and ordered my first batch of PCB's (first ive ever created) They were great except for one thing; I thought that setting my SMD pads layer to 'All' in the software would create a ...
0
votes
3answers
187 views

How do I secure the connection to this battery (CR1616)?

I'm replacing the batter in a Game Boy Advance game cartridge. (Don't mind the bad solder job; the iron isn't handling well.) I've gotten it to work, but the battery is held down with very little ...
2
votes
3answers
898 views

Altium high current trace

I'm designing a PCB in Altium and I need to trace tracks that can support 20A. I used a PCB Track Width Calculator and I need a width of 10mm for my tracks. The problem is, how do you link the pads of ...
1
vote
0answers
81 views

Ground under PCB pads for wire dipole?

I have a wire dipole antenna that I am connecting to a PCB. I know that ground should be cleared under most antennas. However, in my case the wire will be mounted away from the PCB. Do I need to ...
1
vote
1answer
114 views

Characteristic impedance of RF PCB when narrowing the trace width to fit pad

I am working on a PCB design that should be matched at a characteristic impedance of 50 Ohms. The circuit down converts a 2.4 GHz signal to a signal in the 2 Mhz- 100 Mhz range using a VCO and a mixer....
4
votes
2answers
392 views

Solder trap pads

I would like to know what is the name of those special pads designed to catch excessive solder and where can I find more information on them.
3
votes
2answers
159 views

Altium: Traces under Pads/Vias

New to Altium here, so my apologies in advances if some of my terms are off. Anyways, I'm looking for a setting that enables traces to be highlighted when clicking on a pad or via. This is the ...
3
votes
2answers
212 views

Center trace between two pads

Is there a way in eagle to center a trace between two pads? and by center, I mean directly center it with even spacing on both sides of it. I'm asking because its easier to solder pads that aren't ...
5
votes
3answers
402 views

Confusing PAD layout in datasheet

I am planning to use a Right Angle RGB LED EASV3015RGBA0 and here is the package dimension and recommended soldering pad: Top matches with LED image(see the anode mark). Bottom is consistent with top....
1
vote
1answer
2k views

Eagle 'optional' solder pads

I'm currently designing a PCB with inter-board interconnects - I figure that right-angle 0.1" headers will be sufficient. I'll be "mass producing" the boards (only a couple of dozen...) so I need them ...
3
votes
1answer
4k views

How do I edit thermals on pads in Eagle?

I have a ground plane and would like to increase the number of gaps in the thermals of a ground pad. I have more than 9 amps running through this ground pad and need to increase contact. It looks ...
3
votes
2answers
2k views

Eagle CAD: One-sided thru-hole pad?

Using Eagle 7.6. I have a part in a TO-5 can. The can needs to mount flush to the PCB, and I'm concerned that the copper on the top side of the standard thru-hole pads might contact the case. For ...
2
votes
2answers
695 views

Eagle has different shape for pads for through hole components why?

While I understand that have 2 distinct shapes helps in determining which is pin 1, why does eagle have so many shapes: square, round, octagon, long, offset. Which is recommended under what ...
1
vote
2answers
2k views

Altium : vias under pad for power drawing and thermal dissipation

On my design, a TO228 mosfet will conduct much power. Under it, I put two Fills (one on top and one on bottom layer). I plan to link them with vias in order to conduct better power and to user the ...
2
votes
1answer
274 views

Line Level to Mic Pad Working Randomly With Phones

I'm trying to build my own headphones to mic pad. I want to connect the input of the pad to a phone's headphones conector and the output of the pad to a second phone's mic connector. Both phones ...
4
votes
1answer
5k views

Through-hole footprints: pad size from technical drawings

I'm creating some footprints for through-hole components in KiCad, and I've got some issues determining the correct pad dimensions from manufacturer's technical drawings. As an example, here's the ...
3
votes
2answers
339 views

Pad connection in Eagle

I am a newbie in Eagle and I'm making a RF layout using GCPW. In the figure below, the pad and the track are in contact. However, the connection still unrouted, why? It became routed only when the ...
0
votes
2answers
562 views

Pad and soldermask dimensions in PCB design

I found that usually on BGA package and on a lot of QFN datasheets are provided IC and PAD-IC dimensions and not advised PCB-PAD dimensions and soldermask dimensions. Can someone tell me a good rule ...
1
vote
1answer
1k views

What use do these round pads have on PCB?

I always find these pads on boards: What use do they have? Is there a specific connector for them or do you need to solder a wire on them?
2
votes
3answers
374 views

Altium: Surface Mount Test Pad Passing Through PCB

I'm working on a PCB in Altium that will sit inside an assembly above another board. The board on the bottom has a test pad, but once everything is assembled it will be inaccessible. Therefore, I am ...