Datasheet

ADXL345 Data Sheet
SPECIFICATIONS
T
A
= 25°C, V
S
= 2.5 V, V
DD I/O
= 1.8 V, acceleration = 0 g, C
S
= 10 µF tantalum, C
I/O
= 0.1 µF, output data rate (ODR) = 800 Hz, unless
otherwise noted. All minimum and maximum specifications are guaranteed. Typical specifications are not guaranteed.
Table 1.
Parameter Test Conditions Min Typ
1
Max 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 Sensitivity
2
±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 X
OUT
, Y
OUT
, Z
OUT
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 X
OUT
, Y
OUT
, Z
OUT
All
g
-ranges, full resolution
3.5
3.9
4.3
m
g/
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
±0.01
%/°C
0 g OFFSET Each axis
0 g Output for X
OUT
, Y
OUT
−150 0 +150 mg
0 g Output for Z
OUT
−250
0
+250
mg
0 g Output Deviation from Ideal, X
OUT
, Y
OUT
±35 mg
0 g Output Deviation from Ideal, Z
OUT
±40 mg
0 g Offset vs. Temperature for X-, Y-Axes ±0.4 mg/°C
0 g Offset vs. Temperature for Z-Axis ±1.2 mg/°C
NOISE
X-, Y-Axes
ODR = 100 Hz for ±2 g, 10-bit resolution or
all g-ranges, full resolution
0.75 LSB rms
Z-Axis
ODR = 100 Hz for ±2 g, 10-bit resolution or
all g-ranges, full resolution
1.1 LSB rms
OUTPUT DATA RATE AND BANDWIDTH User selectable
Output Data Rate (ODR)
3, 4, 5
0.1 3200 Hz
SELF-TEST
6
Output Change in X-Axis 0.20 2.10
g
Output Change in Y-Axis −2.10 −0.20
g
Output Change in Z-Axis 0.30 3.40
g
POWER SUPPLY
Operating Voltage Range (V
S
) 2.0 2.5 3.6 V
Interface Voltage Range (V
DD I/O
) 1.7 1.8 V
S
V
Supply Current
ODR ≥ 100 Hz
140
µA
ODR < 10 Hz 30 µA
Standby Mode Leakage Current 0.1 µA
Turn-On and Wake-Up Time
7
ODR = 3200 Hz 1.4 ms
Rev. E | Page 4 of 40