ADXL356 Output voltaje

Hello, at this moment I am working with these sensors.
My question is the following:

- According to the technical data sheet, the output voltage is radiometric to 1.8 [V]. Then, the values delivered by the sensor range from -1.8 to 1.8 [V], where 0 equals 0 [g]? Or the values it delivers range in scale from 0 to 1.8 [V], being 0.9 [V] equivalent to 0 [g]?

Thank you