This part is a kind of semiconductor called ADXL320.

Function of this product has Small and Thin 5 g Accelerometer.

Manufacturers : Analog Devices

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Some of the text within the PDF file :

Small and Thin ±5 g Accelerometer ADXL320 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 5.25 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 GENERAL DESCRIPTION The ADXL320 is a low cost, 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 ±5 g (typical). It can also measure both dynamic acceleration (vibration) and static accelerat [ ... ]

ADXL320 PDF Datasheet Download