LM3886 and LM4780 Eagle outlines

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CJ900RR

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Joined 2006
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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diarav

Member
Joined 2004
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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CJ900RR

Member
Joined 2006
diarav said:
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.
Click to expand...


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.
 
anbello

anbello

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Joined 2004
hifilab.it
CJ900RR said:



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.
Click to expand...


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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