LPS33W- soldering Pin 11 (GND) necessary?

[DHert.1]

Hello,

It is necessary to solder pin 11 (GND)?

The data sheet is not clear on this.

[niccolò]

Hello @DHert.1​,

you are right, the datasheet is not very clear, but soldering the central GND pin to 0V ensures that the sensor will work properly.

If it is not soldered, thermal problems may arise and slightly alter the measurement.

You can extend the GND pad of pin 8 and 9, is there any problem with that?

[DHert.1]

Thanks for the answer!

Ok, so if i extend the GND of pin 8 and 9, it could work ? I have a Groundpolygon on my PCB so theres enough GND ground area.

We are not experienced in soldering QFN and it would be annoying, if there would be short circuits. So we had the consideration, reducing this risk of short circuits if we dont solder the Pin 11.

[niccolò]

You're welcome!

Yes, you can extend pin 8 and 9 with no problems, that is the easiest way of fixing it and this way the sensor reaches its maximum accuracy and precision.

Personally I would recommend to get the pin 11 to GND, but be reassured that the sensor will work even if it is not soldered (just with a slight possible error of measurement).

hope you can keep me updated with the results.