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stephan
stephan
Visitor II
July 17, 2015
Question

LIS3DH accelerometer sensitivity in low power mode

  • July 17, 2015
  • 2 replies
  • 1546 views
Posted on July 17, 2015 at 15:05

Hello,

I am planning to operate the LIS3DH accelerometer in low power mode (resulting in an output data rate of 5kHz according to Table 26 in the datasheet).

In Table 3 in the datasheet a sensitivity of 12mg/digit is given, but I think this is referring to the high resolution mode (similar to the specification given for the LIS2DH12 accelerometer).

Which sensitivity will I achieve in the low power mode with the LIS3DH (measurement range set to +-16g)?

Thanks!

#mems-accelerometer
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2 replies

johnray9
johnray9
Visitor II
November 17, 2015
Posted on November 17, 2015 at 16:28

I believe low power mode is 8 bit where normal mode is 12 bit.

dave Hoogendoorn
dave Hoogendoorn
Visitor II
August 15, 2017
Posted on August 15, 2017 at 10:29

In table 26 of the datasheet (LIS3DH_Datasheet_DocID_17530rev1.pdf) I also see an omission. The last row in the tabel is showing: Normal (1.25 kHz) / low power mode (5 KHz). This seems odd, since a higher frequency would consume more energy.

M
Miroslav BATEK
ST Employee
August 15, 2017
Posted on August 15, 2017 at 11:49

LIS3DH has three modes with different resolution:

Low-power mode - 8 bit

Normal mode - 10 bit

High resolution mode - 12 bit.

ODR 5376Hz is available only in Low-power mode.

It is also true that higher ODR means higher current consumption.

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