How can I use one of these BGA package chips? - Page 1
Forum section: electronics / projects

author: iceisfun
author_rank: Regular Contributor
timestamp: September 26, 2013, 02:52:11 am
content: Hello!I've found a useful BGA chip I want to mess around with and I need to break it out to a DIPhttp://www.ichaus.de/product/iC-LNGIs there a easy way to go about this?Thanks

author: JonnyBoats
author_rank: Regular Contributor
timestamp: September 26, 2013, 03:06:06 am
content: One thing which might make things easier for you is a BGA socket, here is one source:http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=BGA_SOCKETSThese are not cheap however.

author: Crazy Ape
author_rank: Regular Contributor
timestamp: September 26, 2013, 03:35:08 am
content: Perhaps you could put it in the middle of the 100 pin footprint on one of these boards (top three boards), chose the one that matches the pitch of the chip.http://www.proto-advantage.com/store/index.php?currency=USD&cPath=4000&sort=2a

author: Psi
author_rank: Super Contributor
timestamp: September 26, 2013, 03:44:00 am
content: There's only 30 pins and the entire chip isn't too small (8x7mm)You could just glue it upside down to a pcb (with hole cutout) and use tiny lengths of thin wire to link each ball to copper pads nearby.Then cover it in hot glue or liquid insulation to stop the wires shorting/breaking.Yes, it would be a little fiddly and time consuming but totally possible.

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: September 26, 2013, 08:17:36 am
content: Quote from: iceisfun on September 26, 2013, 02:52:11 amLinks at the right of the page mention a demo board - have you asked them about this?

author: Rudolfo
author_rank: Contributor
timestamp: September 26, 2013, 10:25:31 am
content: is the eval board converting it to a parallel interface connector:http://www.ichaus.de/upload/pdf/LNG2M_evalmanual_A1en.pdf.

author: amyk
author_rank: Super Contributor
timestamp: September 26, 2013, 12:03:50 pm
content: Quote from: JonnyBoats on September 26, 2013, 03:06:06 amOP is working with an optical device so sockets that clamp over the top of the chip won't work.But $700?In China you can get BGA sockets for much, much less...

author: brainwash
author_rank: Frequent Contributor
timestamp: September 26, 2013, 04:16:30 pm
content: These seem pretty cheap:http://www.proto-advantage.com/store/index.php?cPath=4000Though in the end it might be faster just to manufacture a few boards with your own BGA to DIP layout.If only one is needed I would do it by hand, there are several useful techniques to use:- make a kapton tape "template" with a hole only big enough to see one pad and solder each wire- wrap some wire wrap wire around the chip spaced at pitch (1 mm), glue it in place, solder the pads, cut the wire; repeat for each row and column- find a similar-pitched proto board and solder it from the other side with component pins going through the holeOut of the 30 pads only 28 are used and probably not all of them are useful. Considering 10s soldering job per pad it would come down to a 5 minutes job just to break out the chip and another 5 to solder it to a DIP socket.

author: olsenn
author_rank: Frequent Contributor
timestamp: September 26, 2013, 04:56:32 pm
content: Avoid BGA! Keep it simple stupid. If you're trying to break out a several-hundred pin IC to DIP, you aren't using the device correctly