ADXL321 Datasheet, PDF (1/16 Pages) Analog Devices – Small and Thin 18 g Accelerometer

FEATURES
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
Good sensitivity accuracy
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
APPLICATIONS
Vibration monitoring and compensation
Abuse event detection
Sports equipment
Small and Thin ±18 g Accelerometer
ADXL321
GENERAL DESCRIPTION
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 ±18 g (typical). It can also
measure both dynamic acceleration (vibration) and static
acceleration (gravity).
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).
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.
The ADXL321 is available in a very thin 4 mm × 4 mm ×
1.45 mm, 16-lead, plastic LFCSP.
FUNCTIONAL BLOCK DIAGRAM
+3V
V_S
ADXL321
C_DC
AC
AMP
DEMOD
OUTPUT
AMP
OUTPUT
AMP
SENSOR
R_FILT
32kΩ
R_FILT
32kΩ
COM
ST
YOUT
C_Y
XOUT
C_X
Figure 1.
Rev. 0
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