The current consumption of the LSM6DSL spikes up when moving in shut-down mode (both Acc and Gyro).

[MrVanBa]

I'm currently testing an LSM6DSL Click board in Power-down mode, with both the Accelerometer and Gyroscope in Power-down mode, in order to achieve minimum current consumption.

However, I've encountered a problem. When I constantly move the sensor for approximately 1 minute, the current consumption spikes up to around 200uA. On the other hand, when I place the sensor on a flat surface and keep it still, the consumption stabilizes at around 3.9uA, which is consistent with the value provided in the datasheet (3uA).

I expected the current consumption of the LSM6DSL to remain the same while in motion as it is when idle. 

Are there any additional registers that I need to configure apart from CTRL1_XL and CTRL2_G?

I would greatly appreciate any assistance!

Note: I always reset the LSM6DSL by setting the SW_RESET to "1" via SPI before taking measurements.

[Federica Bossi]

Hi @Thanh Au Duong​ ,

Welcome to ST Community!

We did some test to check if the issue could be replicated by us but I confirm you that you shouldn't see this variation. I think it could be due to the variation of the setup stability during the movement.

If this helps you, please mark my answer as "Best Answer" by clicking on the "Select as Best" button, this can be helpful for Community users to find this solution faster. 

[MrVanBa]

Thanks for the answer @Federica Bossi​ 

I eventually figured it out!

The module is actually fine.

The spike in current consumption seems to occur due to direct contact between human skin and the module during the test.

I tried isolating the module with some electrostatic materials, and it worked as expected.