OrCad Capture to Layout
- From: "Vitaliy" <vmykhayl@xxxxxxxxxxxxx>
- Date: 9 Jan 2006 06:18:51 -0800
Hello,
I am using OrCAD 10.5 full suite for my school project. I'm fairly new
to it as well. I got stuck with the following problems:
1) From what I read, the schematics and pcb footprint aren't exactly
correlated. I am using Capture CIS. I could not find how to represent
PCB footprint for OPA655 (SOIC) from TI.
http://focus.ti.com/docs/prod/folders/print/opa655.html
In fact, I am not sure what the PCB footprint code for any opamp is. Or
should I use SOG.050/8/WG.something/L.something. I am not sure what 050
in SOG represents, because there are different options (i.e. 025 as
SOG.025), so I do not know which one to use. Also, if I were to use SOG
and
http://focus.ti.com/general/docs/lit/getliterature.tsp?literatureNumber=msoi002c&fileType=pdf
is my opamp, which dimensions am I supposed to match? Chip with the
pins or chip without the pins? Or somewhere in the middle so it is
easier to solder.
2) I am also supposed to use OPA657 (SOIC)
http://focus.ti.com/docs/prod/folders/print/opa657.html. However, there
is no electrical model for it in the libraries. So, I downloaded this
opamp library from TI website. The model looks ugly though with some
pins in the middle of the chip. I can move the pins around, also it
still wouldn't look like an opamp after that. Is there a way to make it
look like opamp, not a rectangle. As far as I understand it wouldn't
matter for Layout.
Thanks,
Vitaliy
.
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