ADXL311

Ultracompact ±2g Dual-Axis Accelerometer ADXL311 FEATURES FUNCTIONAL BLOCK DIAGRAM High resolution Dual-axis accelerometer on a single IC chip 5 mm × 5 mm × 2 mm LCC package 3.0V VDD CX XOUT SELF TEST Low power <400 µA (typ) X-axis and Y-axis aligned to within 0.1° (typ) X SENSOR DEMOD XFILT 32kΩ BW adjustment with a single capacitor Single-supply operation High shock survival APPLICATIONS E Tilt and motion sensing Smart hand-held devices Computer security Input devices T Pedometers and activity monitors Game controllers Toys and entertainment products E GENERAL DESCRIPTION L The ADXL311 is a low power, complete dual-axis accelerometer with signal conditioned voltage outputs, all on a single monolithic IC. The ADXL311 is built using the same proven iMEMS® process used in over 180 million Analog Devices O accelerometers shipped to date, with demonstrated 1 FIT reliability (1 failure per 1 billion device operating hours). The ADXL311 measures acceleration with a full-scale range of S ±2 g. The ADXL311 can measure both dynamic acceleration (e.g., vibration) and static acceleration (e.g., gravity). The OB outputs are analog voltages proportional to acceleration. CDC OSCILLATOR DEMOD YFILT 32kΩ Y SENSOR ADXL311 COM YOUT CY Figure 1. 03582-001 The typical noise floor is 300 µg/√Hz, allowing signals below 2 mg (0.1° of inclination) to be resolved in tilt sensing applications using narrow bandwidths (10 Hz). The user selects the bandwidth of the accelerometer us...