topic Re: MMA845 PCB Layout in Sensors

MMA845 PCB Layout

MaxPower100 — Tue, 03 Feb 2026 21:31:46 GMT

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.

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

Document Number: MMA8451Q Rev. 10.3, 02/2017

Re: MMA845 PCB Layout

guoweisun — Mon, 26 Feb 2024 01:52:02 GMT

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."

Re: MMA845 PCB Layout

MaxPower100 — Mon, 26 Feb 2024 13:00:11 GMT

1. ok

2. That's not an answer...

3. Huh? Did you fall asleep?