What for and who could use this $39,000 FPGA ? - Page 1
Forum section: electronics / general

author: ez24
author_rank: Super Contributor
timestamp: August 25, 2015, 10:35:20 pm
content: http://www.digikey.com/product-detail/en/XC7V2000T-G2FLG1925E/XC7V2000T-G2FLG1925E-ND/3981901Who would be able to mount this and what would something like this be used for? Is a 45x45 pin chip common in industry?Maybe military jets?

author: marshallh
author_rank: Unknown
timestamp: August 26, 2015, 12:20:46 am
content: Telecomms, asic prototyping

author: Nerull
author_rank: Frequent Contributor
timestamp: August 26, 2015, 12:41:50 am
content: These are sold primarily on dev boards for asic prototyping.Here's one with 4 of em:http://www.hitechglobal.com/Boards/Quad-Virtex7-V2000.htm

author: helius
author_rank: Super Contributor
timestamp: August 26, 2015, 12:44:52 am
content: I have a chip in my parts box with that many pads. I think it can be manually soldered with VPR.Fabricating a board for it will need a lot of layers to bring out all the I/Os, however.

author: EEVblog
author_rank: Unknown
timestamp: August 26, 2015, 12:48:32 am
content: We used similar ones (equivalent at the time) for realtime beamforming on underwater sonar systems.

author: tggzzz
author_rank: Super Contributor
timestamp: August 26, 2015, 09:16:44 am
content: The High Frequency Trading mob code entire protocol stacks and trading algorithms in FPGAs, to minimise the latency. No processors in the trading loop!To shave a few ms off trading times, they will lay an entire $600m transatlantic cable, or buy up all the microwave links between Chicago and New York because the speed of light in air is faster than than in fibres.That FPGA is chicken feed that would be lost in the noise!

author: Psi
author_rank: Super Contributor
timestamp: August 26, 2015, 09:23:27 am
content: $39,000 2000 pin BGA to solder??Better get some hook up wire!I dont know the story behind the pic, but was likely the result of one engineer saying to another that it was impossible to do.

author: MT
author_rank: Super Contributor
timestamp: August 26, 2015, 06:56:17 pm
content: hilarious!

author: Gyro
author_rank: Super Contributor
timestamp: August 26, 2015, 07:19:45 pm
content: Who got their pinout wrong then!

author: rx8pilot
author_rank: Super Contributor
timestamp: August 26, 2015, 07:25:50 pm
content: I would hat to be the one responsible for assembling the PCB with 4 of them. Better double check the oven profile, solder paste, etc.

author: rs20
author_rank: Super Contributor
timestamp: August 27, 2015, 12:46:54 am
content: Quote from: rx8pilot on August 26, 2015, 07:25:50 pmSolder paste? The solder is already on the package in the form of balls... Right?Edit: I'm not so sure now, theHead in pillowsoldering failure mode doesn't make any sense if they don't use solder paste? I'm confused now.

author: rx8pilot
author_rank: Super Contributor
timestamp: August 27, 2015, 12:48:11 am
content: you now know how many BGA's I have placed.Sent from my SAMSUNG-SM-G890A using Tapatalk

author: marshallh
author_rank: Unknown
timestamp: August 27, 2015, 01:59:53 am
content: Usually paste is deposited for the bgas since it contains flux. You can also only deposit flux but that's a separate screening step.

author: ajb
author_rank: Super Contributor
timestamp: August 27, 2015, 06:21:43 pm
content: Quote from: rx8pilot on August 26, 2015, 07:25:50 pmA local assembler claims to have built a few boards that had several similar parts mounted back-to-back on the same board for some sort of aerospace or mil application that needed very close coupling between devices.

author: zapta
author_rank: Super Contributor
timestamp: August 27, 2015, 07:24:50 pm
content: Quote from: Psi on August 26, 2015, 09:23:27 amThink parallelism. 2000 people can finish it in 1 minute.

author: Berni
author_rank: Super Contributor
timestamp: August 30, 2015, 09:06:46 am
content: Holy crap was that a patient electronics engineer.But he got the job done.

author: rx8pilot
author_rank: Super Contributor
timestamp: August 31, 2015, 08:32:22 pm
content: Quote from: Berni on August 30, 2015, 09:06:46 amThe photo does not reveal what happened when power what applied. Pretty hard to imagine that method would yield a functional result.

author: Berni
author_rank: Super Contributor
timestamp: September 01, 2015, 02:46:02 pm
content: Quote from: rx8pilot on August 31, 2015, 08:32:22 pmGood point. Pretty sure this violates the "X number of capacitors directly across supply pins" routing requirement. But if this is not a terribly high speed chip and all those joints are indeed ok then it might just work.