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PCB Peer Review?

Former Member

If interested i need some help reviewing my design. I havent done any PCB work before and was looking for some review help before i order it.

The layout is attached the power net is 22mm and the Ground is 20mm. The signal will come in through a DB25 and exit on a DB25 power is supplied from an Acopian 28EB5E250 (because i have 28Vdc handy) .

IC:

http://www.deiaz.com/data-sheets/DS-MW-01026-02-D.pdf

 

Newark P/N's:

796949-4796949-4 Socket Adapter

85K7801 Terminal Board

69K7219 Header

89F3212 Cap

66C6057 Cap

 

 

Thanks for the help.

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  • in reply to michaelkellett

    My appologies i had typed in mm and it should have been mil. When i drew it it was in inches but the software put it all in mil.

    So the vias are 10 mil (.01 in.)

    12 mil for signals

    22 mil for power

    20 mil for ground

     

    So a big difference in overall size.

     

    I upped the power to 38 mil without issues and the ground to 30 mil with no issues. Any larger on the ground and i was running into clearance issues.

     

    The CAD system I am using is Ultiboard and Multisim from National Instruments.

    design rules are all in mil:

     

    Trace width = 12.0

    Max trace width = 393.0

     

    Min trace length = .03

    Max trace length = 39370.0

     

    Min trace neck length = .0393
    Max trace neck length = .0393

     

    Clearance to traces, pads, vias & copper areas = 14.0

     

    Allow pin swapping = yes

     

    Min tool size for drilling = 10.0

     

     

    Thanks for the help.

  • in reply to Former Member

    Those rules should be OK. I would advise you to specify finished hole size rather than drill size - you don't care what drill they use when your board is made you only care about the hole.

     

    The best way to get some workable design rules is to ask the people who will make the board. Many pcb companies have design rules on the web. I use www.pcbtrain.com but there are many others.