MMA845 PCB Layout

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MMA845 PCB Layout

1,321 次查看
MaxPower100
Contributor I

Hello,

The app note  "MMA845xQ Design Checklist and
Board Mounting Guidelines"

Document Number: AN4077
Rev. 2, 10/2012

Page 7, Item 7 says " Do not place any components or vias at a distance less than 5 mm from the package land area. This may cause additional package stress if it is too close to the package land area."

Why? Especially when demo board on Page 5 shows vias and parts right up next the the device.

MaxPower100_0-1708638039579.png

 

Also, the recommend land sizes are different in the newer datasheet compared to the app note.

Document Number: MMA8451Q Rev. 10.3, 02/2017

 

 

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1,280 次查看
MaxPower100
Contributor I

1. ok

2. That's not an answer...

3. Huh? Did you fall asleep?

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1,285 次查看
guoweisun
NXP TechSupport
NXP TechSupport

1:This product is in “End of Life” status, we recommend FXLS8974CF or FXLS8967AF as a replacement.

2:Distance less than 5 mm from the package land area. This may cause additional package stress if it is too close to the package land area."

3:

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