ADXL321| Datasheet

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Small and Thin 18 g Accelerometer ADXL321
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 A 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

GENERAL DESCRIPTION
The ADXL321 is a small and thin, low power, complete dualaxis 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 g/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.

APPLICATIONS
Vibration monitoring and compensation Abuse event detection Sports equipment

FUNCTIONAL BLOCK DIAGRAM
+3V

ADXL321

CDC

AC AMP SENSOR

DEMOD

OUTPUT AMP

RFILT 32k

COM

Figure 1.

Rev. 0
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05291-001

YOUT CY

XOUT CX