How to get acceleration values of x, y and z from raw data of Lis3dh?

[Piyush_9536]

I had successfully interfaced lis3dh on nrf52 dev board using i2c protocol, i am getting raw values of x, y and z but i don't know how to interpret those values i.e. convert them into acceleration (g), even not getting clear picture from datasheet. i am using 8G range of sensor please anyone guide me

Thanks in advance

[haakonsh]

I'm no expert on the lis3dh, but the datasheet says "±2g/±4g/±8g/±16g dynamically selectable full scale" and "16-bit data output" on the Features brief, and "The value is expressed as two’s complement left-justified." from the register description of the output registers. Accellerometers are sampled with an ADC, so treat the raw data as an 16-bit int, that is left-shifted to msb.

F.ex with +/-2g scale and 10 bit precicion the raw values will have a range of -1023 to + 1023, then you shift the raw value to your preferred precision and multiply it with 2 * 1G to get the G-value. 

Take a look at this stackeoverflow post: https://stackoverflow.com/questions/49467573/convert-twos-complement-left-justified-integer-into-regular-binary/50237543.