2014-06-13 01:07 AM
after power up the LIS2DM the current consumption is about 100uA ?!
The connection is:Pin1 : SCL with a external 4K7 to 3VPin2 : SDA with a external 4K7 to 3VPin3 : SA0 connected to GNDPin4 : /CS connected to 3VPin5: INT2 openPin6: INT1 to Input Port uPPin7,8: 3VPin9-14: GNDCould it be that there is an internal pull-up on Pin3 and I should connect the SA0 line to 3V to get a low power consumption ? #lis2dm-i2c-sa02015-02-10 02:19 PM
Did you ever get a definitive answer to this? I'm seeing about 100uA higher power consumption with an LIS2DH12 than I would expect and this seems like it could be the issue. And 100 uA corresponds exactly a with 3V across a 30K pullup.
2015-03-19 11:27 AM
We encountered the same problem with the LIS3DH. The SA0 has an internal pull up. If you ground it you will draw the extra current. We float it to set that address bit = 1 on the I2C bus.