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Old 2nd November 2006, 08:24 AM   #1
Bob0513 is offline Bob0513  United States
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Default LM3886 and LM4780 Eagle outlines

Does anyone have the component outlines for the LM3886 and/or LM4780. The library on cadsoft.de that has the components is bad.
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Old 2nd November 2006, 09:23 AM   #2
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Search for my single sided LM4780 PCB thread. I posted the Eagle files so it has the appropriate footprint there.
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Old 2nd November 2006, 11:36 AM   #3
CJ900RR is offline CJ900RR  Sweden
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If you find some eagle lbr for the 3886/3875 made by a Andrew or something simulare, dont remember exactly, do NOT use it.

It has the wrong hole-size AND wrong pitch (disstance between the legs). I used it for my boards and had to drill and mixture alot to fit my LM3875 in to it.
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Old 2nd November 2006, 12:58 PM   #4
diarav is offline diarav  India
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If you are talking about lmopamp.lbr file, then I had no problems using the LM3886 outline on the board. Fitted perfectly. The pitch is ok. If this is the problem, perhaps you can check if your printing dimensions are coming out fine.

There is a problem with the schematic however. Some pins (I think 8, 4, 5 ) dont "connect" as they were not aligned with the grid. I manually edited the schematic for LM3886 and fixed this.
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Old 2nd November 2006, 04:52 PM   #5
CJ900RR is offline CJ900RR  Sweden
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Quote:
Originally posted by diarav
If you are talking about lmopamp.lbr file, then I had no problems using the LM3886 outline on the board. Fitted perfectly. The pitch is ok. If this is the problem, perhaps you can check if your printing dimensions are coming out fine.

There is a problem with the schematic however. Some pins (I think 8, 4, 5 ) dont "connect" as they were not aligned with the grid. I manually edited the schematic for LM3886 and fixed this.

No I dont think it was that one. But I am not shure. In Eagle's library-list it was named "Andrew custom" I think..

The files was send to a real PCB manufacturing company, a company that deliver weekly to my work, and we never have any problems with their quality. And everything else on the PCB was correct, so my guess is still that it was the library.
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Old 3rd November 2006, 05:44 PM   #6
anbello is offline anbello  Italy
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Quote:
Originally posted by CJ900RR



No I dont think it was that one. But I am not shure. In Eagle's library-list it was named "Andrew custom" I think..

The files was send to a real PCB manufacturing company, a company that deliver weekly to my work, and we never have any problems with their quality. And everything else on the PCB was correct, so my guess is still that it was the library.

I can confirm, "Andrew - Custom", don't use it.
I had the same problem, PCB from manufacturing company and then a lot of work to fit the LM3886 with force because of too small holes.

ciao
andrea
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Old 3rd November 2006, 08:04 PM   #7
Alcaid is offline Alcaid  Norway
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I made this file some time ago.

Contains:
- LM3886
- LM4780
- OPA541

Use at own risk (double check drills, pinout, pin spacing etc.) I've used them with no problems, but I do make my own PCBs.
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Old 3rd November 2006, 11:01 PM   #8
CJ900RR is offline CJ900RR  Sweden
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Quote:
Originally posted by Alcaid
I made this file some time ago.

Contains:
- LM3886
- LM4780
- OPA541

Use at own risk (double check drills, pinout, pin spacing etc.) I've used them with no problems, but I do make my own PCBs.

And where is the file
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Old 4th November 2006, 01:26 PM   #9
Alcaid is offline Alcaid  Norway
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I attached the file, but I forgot to compress it to a valid file format.
Attached Files
File Type: zip lm&opa.zip (2.0 KB, 894 views)
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