Analog Devices ADXL202E
The ADXL202E is a low-cost, low-power, complete 2-axis accelerometer with a digital output, all on a single monolithic IC. It is an improved version of the ADXL202AQC/JQC. The ADXL202E will measure accelerations with a full-scale range of Ϯ2 g.FEATURES
2-Axis Acceleration Sensor on a Single IC Chip 5 mm ؋ 5 mm ؋ 2 mm Ultrasmall Chip Scale Package 2 mg Resolution at 60 Hz Low-Power < 0.6 mA Direct Interface to Low-Cost Microcontrollers via Duty Cycle Output BW Adjustment with a Single Capacitor 3 V to 5.25 V Single Supply Operation 1000 g Shock SurvivalAPPLICATIONS
2-Axis Tilt Sensing with Faster Response than Electrolytic, Mercury, or Thermal Sensors Computer Peripherals Information Appliances Alarms and Motion Detectors Disk Drives Vehicle Security XOUT ADXL202E RFILT 32k⍀ DEMOD Y SENSOR COM C O U N●P T E R T2 T1 A(g) = (T1/T2 – 0.5)/12.5% 0g = 50% DUTY CYCLE T2 = RSET/125M⍀
GENERAL DESCRIPTION
It is an improved version of the ADXL202AQC/JQC. The ADXL202E can measure both dynamic acceleration (e.g., vibration) and static acceleration (e.g., gravity). The outputs are analog voltage or digital signals whose duty cycles (ratio of pulsewidth to period) are proportional to acceleration. The duty cycle outputs can be directly measured by a microprocessor counter, without an A/D converter or glue logic.