LIS3DH power consumption too high

emariatos · ‎2012-07-31

Posted on July 31, 2012 at 20:12

We use LIS3DH at 10Hz, with FIFO, low power mode, I2C for communication. We measure current at we get:

- at 3.6V supply, 160uA

- at 3.0V supply, 100uA

- at 2.3V supply 60uA

The datasheet claims 6uA, what might we be doing wrong?

#lis3dh

munddr · ‎2015-11-24

Posted on November 25, 2015 at 07:55

I've tried connecting SA0 to Vcc, but I get a negative voltage over the 100R shunt (-3.6mV). With a 1K shunt, I get -36mV. How could this be the case?

Thanks for the help in advance.

jgaldana · ‎2016-09-16

Posted on September 16, 2016 at 15:48

Hi Support team,

Since there is an internal pull-up on this pin, it could be left floating/disconnected and assume this solution is going to be reliable? or it must be tied to VCC?

Thanks in advance,

jgaldana · ‎2016-09-19

Posted on September 19, 2016 at 15:24

I am going to answer my own question. The answer is not. If this pin is left disconnected the ''pull-up'' is not strong enough and oscillates under certain conditions.