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ADXL311

Low Cost, Ultracompact ±2 gDual-Axis Accelerometer

Analog Devices 

ADXL311

SPECIFICATIONS

Table 1. TA = 25oC, VDD = 3 V, RBIAS = 125 kΩ, Acceleration = 0 g, unless otherwise noted.)

Parameter

Conditions

Min Typ

SENSOR INPUT

Each Axis

Measurement Range

±2

Nonlinearity

Aligment Error1

Best Fit Straight Line

0.2

±1

Aligment Error

Cross Axis Sensitivity2

X Sensor to Y Sensor

0.01

±2

SENSITIVITY

Each Axis

Sensitivity at XFILT, YFILT

Sensitivity Change due to Temperature3

VDD = 3 V

Delta from 25°C

140 167

−0.025

ZERO g BIAS LEVEL

Each Axis

0 g Voltage XFILT, YFILT

0 g Offset vs. Temperature

VDD = 3 V

Delta from 25°C

1.2

1.5

2.0

NOISE PERFORMANCE

Noise Density

@25°C

300

FREQUENCY RESPONSE

3 dB Bandwidth

Sensor Resonant Frequency

At Pins XFILT, YFILT

6

10

FILTER

RFILT Tolerance

Minimum Capacitance

SELF TEST

32 kΩ Nominal

At Pins XFILT, YFILT

±15

1000

XFILT, YFILT

POWER SUPPLY

Self Test 0 to 1

45

Operating Voltage Range

2.7

Quiescent Supply Current

0.4

Turn-On Time

TEMPERATURE RANGE

160 × CFILT + 0.3

Operating Range

0

Max Units

g

% of FS

Degrees

Degrees

%

195 mV/g

%/°C

1.8 V

mg/°C

µg/√Hz RMS

kHz

kHz

%

pF

mV

5.25 V

1.0 mA

ms

70

°C

1 Alignment error is specified as the angle between the true and indicated axis of sensitivity (Figure 1).

2 Cross axis sensitivity is the algebraic sum of the alignment and the inherent sensitivity errors.

3 Defined as the output change from ambient to maximum temperature or ambient to minimum temperature.

Rev. A | Page 3 of 12

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