Replace IMU sensor on an old PCBA with LSM6DSV320X

[oysteikr]

Hi

 

We have a old PCBA design with a TDK IMU sensor. When I look at the footprint and pinout it seems like it actually drop-in-replaceable and we should need no new PCBA design, only change the BOM list and replace the TDK sensor with LSM6DSV320X

But the LSM6DSV320X datasheet says that pin 10 and pin 11:

Leave pin electrically unconnected and soldered to PCB.

But in our design thay are connected to GND signal ground.

What would happen if we replace it, will the LSM6DSV320X not work if the pins 10 and 11 are grounded?

 

krr

Øystein

[Federica Bossi]

Hi @oysteikr ,

The LSM6DSV320X can still be used as a drop‑in replacement in your design.
Although the datasheet recommends leaving pins 10 and 11 unconnected and only soldered to the PCB, connecting these pins to GND is acceptable and will not prevent the LSM6DSV320X from operating correctly.

[Andrew Neil]

Elsewhere in the datasheet recommends connecting to VDDIO:

 

[oysteikr]

Hi

I guess the reason why the datasheet recommends it is because these pins have weak internal pull ups to VDDIO, if they are connected to ground there will be a small leakage current <1mA. Thats why its recommended in the datasheet to connect with VDDIO or leave floating, but functionality should be 100% intact.

 

kr

Øystein