Data Sheet

ADXL346

Rev. C | Page 3 of 40

SPECIFICATIONS

TA = 25°C, VS = 2.6 V, VDD I/O = 1.8 V, acceleration = 0 g, CS = 10 μF tantalum, CI/O = 0.1 μF, ODR = 800 Hz, unless otherwise noted.

Table 1. Specifications

Parameter

Test Conditions

Min1

Typ2

Max1

Unit

SENSOR INPUT

Each axis

Measurement Range

User selectable

±2, ±4, ±8, ±16

g

Nonlinearity

Percentage of full scale

±0.5

%

Inter-Axis Alignment Error

±0.1

Degrees

Cross-Axis Sensitivity3

±1

%

OUTPUT RESOLUTION

Each axis

All g Ranges

10-bit resolution

10

Bits

±2 g Range

Full resolution

10

Bits

±4 g Range

Full resolution

11

Bits

±8 g Range

Full resolution

12

Bits

±16 g Range

Full resolution

13

Bits

SENSITIVITY

Each axis

Sensitivity at XOUT, YOUT, ZOUT

All g ranges, full resolution

230

256

282

LSB/g

±2 g, 10-bit resolution

230

256

282

LSB/g

±4 g, 10-bit resolution

115

128

141

LSB/g

±8 g, 10-bit resolution

57

64

71

LSB/g

±16 g, 10-bit resolution

29

32

35

LSB/g

Sensitivity Deviation from Ideal

All g ranges

±1.0

%

Scale Factor at XOUT, YOUT, ZOUT

All g ranges, full resolution

3.5

3.9

4.3

mg/LSB

±2 g, 10-bit resolution

3.5

3.9

4.3

mg/LSB

±4 g, 10-bit resolution

7.1

7.8

8.7

mg/LSB

±8 g, 10-bit resolution

14.1

15.6

17.5

mg/LSB

±16 g, 10-bit resolution

28.6

31.2

34.5

mg/LSB

Sensitivity Change Due to Temperature

±0.02

%/°C

0 g OFFSET

Each axis

0 g Output for XOUT, YOUT, ZOUT

−150

0

+150

mg

0 g Output Deviation from Ideal

±35

mg

0 g Offset vs. Temperature for X-, Y-Axes

±0.7

mg/°C

0 g Offset vs. Temperature for Z-Axis

±1.3

mg/°C

NOISE

X-, Y-Axes

ODR = 100 Hz for ±2 g, 10-bit

resolution or all g ranges, full

resolution

1.1

LSB rms

Z-Axis

ODR = 100 Hz for ±2 g, 10-bit

resolution or all g ranges, full

resolution

1.5

LSB rms

OUTPUT DATA RATE AND BANDWIDTH

User selectable

Output Data Rate (ODR)4, 5, 6, 7

0.10

3200

Hz

SELF-TEST8

Output Change in X-Axis

0.27

1.55

g

Output Change in Y-Axis

−1.55

−0.27

g

Output Change in Z-Axis

0.40

1.95

g

POWER SUPPLY

Operating Voltage Range (VS)

1.7

2.6

2.75

V

Interface Voltage Range (VDD I/O)

1.7

1.8

VS

V

Measurement Mode Supply Current

ODR ≥ 100 Hz

140

μA

ODR < 10 Hz

30

μA

Standby Mode Supply Current

0.2

μA

Turn-On and Wake-Up Time9

ODR = 3200 Hz

1.4

ms