ADXL210E

a 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 www.DataSheet4U.com 1000 g Shock Survival APPLICATIONS 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 Low-Cost ؎10 g Dual-Axis Accelerometer with Duty Cycle ADXL210E FUNCTIONAL BLOCK DIAGRAM 3V TO 5.25V CX VDD X SENSOR DEMOD CDC OSCILLATOR RFILT 32k⍀ ANALOG TO DUTY CYCLE (ADC) YOUT YFILT CY T2 RSET XFILT SELF-TEST XOUT ADXL210E RFILT 32k⍀ DEMOD Y SENSOR COM C O U N ␮P T E R T2 T1 A(g) = (T1/T2 – 0.5)/4% 0g = 50% DUTY CYCLE T2 = RSET/125M⍀ GENERAL DESCRIPTION The ADXL210E 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 ADXL210AQC/JQC. The ADXL210E will measure accelerations with a full-scale range of ± 10 g. The ADXL210E 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 ...