LIS2DW12 consumes up to 110uA in low power mode and 230uA in high performance mode. Why is it so high?

jzhon.2 · ‎2023-04-02

Federica Bossi · ‎2023-04-03

Hi Jzhon.2,

What are your FS and ODR settings?

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jzhon.2 · ‎2023-04-04

hello

My fs is 2g and ODR is 12.5HZ. I have tried various combinations, but the current has been 110+uA in a test environment with an operating voltage of 3.00V. I have seen some cases on the community and I also suspect that it is caused by my connecting SDO to GND and pulling up internally.

I switched to a LIS2DH12 Gsensor, and the current did drop when I disabled the pull-up resistor. I had a problem with this chip, I couldn't use fifo. By printing the register configuration written, I found that the Settings were written successfully, but FIFO_SRC_REG was always 0x20, I was puzzled how I could use fifo mode.

In addition, I have another question, low_power 50HZ power consumption 6uA in the specification, what is the prerequisite for this data? When I set the low_powewr mode ODR 10HZ, I read the Gsensor data once per second, but the average power consumption is 18uA, and the current during measurement is up to 150uA, is this normal?