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.

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