ADXL322 Datasheet, PDF (1/16 Pages) Analog Devices – Small and Thin +-2 g Accelerometer

Small and Thin ±2 g Accelerometer
ADXL322
FEATURES
Small and thin
4 mm × 4 mm × 1.45 mm LFCSP package
2 mg resolution at 60 Hz
Wide supply voltage range: 2.4 V to 6 V
Low power: 340 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
Pb Free: Compatible with Sn/Pb and Pb-free solder processes
APPLICATIONS
Cost-sensitive motion- and tilt-sensing applications
Smart hand-held devices
Mobile phones
Sports and health-related devices
PC security and PC peripherals
GENERAL DESCRIPTION
The ADXL322 is a small, thin, low power, complete, dual-axis
accelerometer with signal conditioned voltage outputs, which
are all on a single monolithic IC. The product measures accel-
eration with a full-scale range of ±2 g (typical). It can also
measure both dynamic acceleration (vibration) and static
acceleration (gravity).
The ADXL322’s typical noise floor is 220 μg/√Hz, which allows
signals below 2 mg to be resolved in tilt-sensing applications
using narrow bandwidths (<60 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 can be selected to suit the application.
The ADXL322 is available in a 4 mm × 4 mm × 1.45 mm,
16-lead, plastic LFCSP.
FUNCTIONAL BLOCK DIAGRAM
+3V
V_S
ADXL322
C_DC
SENSOR
COM
AC
AMP
DEMOD
OUTPUT
AMP
OUTPUT
AMP
R_FILT
32kΩ
R_FILT
32kΩ
ST
Y_OUT
X_OUT
C_Y
C_X
Figure 1.
Rev. 0
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