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How to decide the power bus width?

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panyi

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Re: power bus width

EM and IR drop is important
In our company's IP, ADC DAC and PLL's IR drop should lass than 10mV.
 

carlson

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Re: power bus width

electric migration(average current) : normally 1mA/um
IR drop(peak current)
 

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power bus width

Hi all,
Can some one explain or share document on what is electromigration and IR ?
Thanks.
 

piao

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power bus width

IR -- IR drop.


you can search on the web for the definition of electromigration.

sometime you also need to take into account of the self-heating.
 

Beerkaah

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power bus width

On the topics of Electromigration You have a description in Your Technology Manuals.
(at least UMC013 and TSMC018 Manuals have a section about the topics)
Or use the Bible ! ;-))
(Hastings: The art of analog layout)

May I ask what is the technology that You use ?
 

forkschgrad

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Re: power bus width

electromigration is one of the topics that is important to understand in IC design. a lot of books and sites that discuss what it is. you can also refer to the friendly wikipedia.
 

manish12

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Re: power bus width

use 1mA/1um ,and use top metals for pad connection ,metal width should be at least 4? .
? = 2 * technology
 

Hunter_BJUT

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power bus width

1mA per um, leave sufficient margin
 

climber73

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Re: power bus width

For power and gnd don't use minimum width in according with electromigration rules.

Bye
 

penchal_gv

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Re: power bus width

Width of Power Metal line depending on Electro Migration(EM) and IR Drop.
These EM & IR depend on process and technology. The current density and resistance are different for diferent metal.

Regards
Penchal
 

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