ADXL335

Rev. B | Page 12 of 16

USE WITH OPERATING VOLTAGES OTHER THAN 3 V

that some performance parameters change as the supply voltage

is varied.

The ADXL335 output is ratiometric, therefore, the output

sensitivity (or scale factor) varies proportionally to the

195 mV/g.

The zero g bias output is also ratiometric, thus the zero g

The output noise is not ratiometric but is absolute in volts;

therefore, the noise density decreases as the supply voltage

increases. This is because the scale factor (mV/g) increases

the X-axis and Y-axis noise density is typically 120 μg/√Hz,

typically 270 μg/√Hz.

Self-test response in g is roughly proportional to the square of

the supply voltage. However, when ratiometricity of sensitivity

is factored in with supply voltage, the self-test response in volts

is roughly proportional to the cube of the supply voltage. For

is approximately −560 mV for the X-axis, +560 mV for the

Y-axis, and +950 mV for the Z-axis.

the X-axis, +96 mV for the Y-axis, and −163 mV for the Z-axis.

The supply current decreases as the supply voltage decreases.

AXES OF ACCELERATION SENSITIVITY

Figure 23. Axes of Acceleration Sensitivity; Corresponding Output Voltage

Increases When Accelerated Along the Sensitive Axis.

GRAVITY

TOP

TOP

TOP

TOP

Figure 24. Output Response vs. Orientation to Gravity