Small and Thin ± ±1
g
Accelerometer
ADXL32±
FEATURES
GENERAL DESCRIPTION
Small and thin
4 mm × 4 mm × 1.45 mm LFCSP package
3 mg resolution at 50 Hz
Wide supply voltage range: 2.4 V to 6 V
Low power: 350 µA at VS = 2.4 V (typ)
Good zero g bias stability
The ADXL321 is a small and thin, low power, complete dual-
axis accelerometer with signal conditioned voltage outputs,
which is all on a single monolithic IC. The product measures
acceleration with a full-scale range of 1ꢀ g (typical). It can also
measure both dynamic acceleration (vibration) and static
acceleration (gravity).
Good sensitivity accuracy
The ADXL321’s typical noise floor is 320 µg/√Hz, allowing
signals below 3 mg to be resolved in tilt-sensing applications
using narrow bandwidths (<50 Hz).
X-axis and Y-axis aligned to within 0.1° (typ)
BW adjustment with a single capacitor
Single-supply operation
10,000 g shock survival
Compatible with Sn/Pb and Pb-free solder processes
The user selects the bandwidth of the accelerometer using
capacitors CX and CY at the XOUT and YOUT pins. Bandwidths of
0.5 Hz to 2.5 kHz may be selected to suit the application.
APPLICATIONS
The ADXL321 is available in a very thin 4 mm × 4 mm ×
1.45 mm, 16-lead, plastic LFCSP.
Vibration monitoring and compensation
Abuse event detection
Sports equipment
FUNCTIONAL BLOCK DIAGRAM
+3V
V
S
ADXL321
C
AC
AMP
OUTPUT
AMP
OUTPUT
AMP
DC
DEMOD
SENSOR
R
R
FILT
32kΩ
FILT
32kΩ
COM
ST
Y
C
X
OUT
OUT
C
X
Y
Figure 1.
Rev. 0
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