[hpsdr] Sasquatch II - BGA256 Adapter

[Henry Vredegoor]

Hi Phil,

Did some more Google'ing and found this:

http://www.ironwoodelectronics.com/Catalog/Content/Templates/PartGrids.cfm?S
tartRow=1&cPart=LS-BGA256G-41&Grid=LS-BGA-41_TABLE

Not sure if it is the exact needed part, but it looks to me like it would
fit (Not at all an expert on this subject)
At US$ 59.00 (with a 10+ discount of 13% US$ 51.33) it doesn't look that
bad?

Of course one would have to compare the cost of a small volume order (say <
500 pcs) of a highly complex PCB (the type that you mentioned) to a simple
PCB type plus one or more of such BGA adapters.

?

Henry.

> -----Original Message-----
> From: hpsdr-bounces at lists.hpsdr.org 
> [mailto:hpsdr-bounces at lists.hpsdr.org] On Behalf Of Philip Covington
> Sent: donderdag 11 december 2008 15:16
> To: Henry Vredegoor
> Cc: hpsdr at lists.hpsdr.org
> Subject: Re: [hpsdr] Sasquatch II
> 
> 
> ***** High Performance Software Defined Radio Discussion List *****
> 
> On Thu, Dec 11, 2008 at 8:04 AM, Henry Vredegoor
> <henry.vredegoor at gmail.com> wrote:
> > Hi Phil, Lyle, All
> >
> > Reading your mail, the BGA packaging seems to be a show 
> stopper for a DIY /
> > non-professional / non-hightech fabrication of a PCB with 
> respect to costs.
> > I know there are solutions to convert a Ball Grid Array to 
> a Pin Grid Array,
> > a sort of small daughter-PCB that has the BGA pads on one 
> side and pins on
> > the other side.
> >
> > One example:
> >
> > http://www.mill-max.com/products/newproducts_detail.cfm?pid=7
> >
> > This would allow you to use a conventional type PCB for the 
> rest of the
> > circuit.
> > Don't know if such a thingy could reduce the costs 
> (-enough) to make this a
> > possible solution?
> >
> > 73
> >
> > Henry.
> 
> Hi Henry,
> 
> Many of those adapters are *many* times the cost of the chips you are
> using them with.
> 
> You also have the problem of the support components requiring the same
> kind of high density design.
> 
> The high density, micro via, blind via, 6+ layer PCBs are not a
> problem if you expect to sell 10K+ units or have a big research
> budget.  For the home experimenter, it is different.  That's why most
> of the experimenter/hobby SDR stuff revolves around the PC.
> 
> That's why I tend to lean to the COTS stuff for the DSP processor
> (like a mini(nano,pico)-ITX board).
> 
> 73 Phil N8VB
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