ADXL210 Datasheet | Analog Devices

a Features 2-Axis Acceleration Sensor on a Single IC Chip Measures Static Acceleration as Well as Dynamic Acceleration Duty Cycle Output with User Adjustable Period Low Power <0.6 m A Faster Response than Electrolytic, Mercury or Thermal Tilt Sensors Bandwidth Adjustment with a Single Capacitor Per Axis 5 m g Resolution at 60 Hz Bandwidth +3 V to +5.25 V Single Supply Operation 1000 g Shock Survival APPLICATIONS 2-Axis Tilt Sensing puter Peripherals Inertial Navigation Seismic Monitoring Vehicle Security Systems Battery Powered Motion Sensing Low Cost ؎2 g/؎10 g Dual Axis i MEMS® Accelerometers with Digital Output ADXL202/ADXL210 GENERAL DESCRIPTION The ADXL202/ADXL210 are low cost, low power, plete 2-axis accelerometers with a measurement range of either ± 2 g/ ± 10 g. The ADXL202/ADXL210 can measure both dynamic acceleration (e.g., vibration) and static acceleration (e.g., gravity). The outputs are digital signals whose duty cycles (ratio of pulsewidth to period) are proportional to the acceleration in each of the 2 sensitive axes. These outputs may be measured directly with a microprocessor counter, requiring no A/D converter or glue logic. The output period is adjustable from 0.5 ms to 10 ms via a single resistor (RSET ). If a voltage output is desired, a voltage output proportional to acceleration is available from the XFILT and YFILT pins, or may be reconstructed by filtering the duty cycle outputs. The bandwidth of the ADXL202/ADXL210 may be set from 0.01 Hz to 5 k Hz via capacitors CX and C Y. The typical noise floor is 500 µg/√Hz allowing signals below 5 mg to be resolved for bandwidths below 60 Hz. The ADXL202/ADXL210 is available in a hermetic 14-lead Surface Mount CERPAK, specified over the 0°C to +70°C mercial or - 40° C to +85° C industrial temperature range. FUNCTIONAL BLOCK DIAGRAM +3.0V TO +5.25V CX VDD VDD XFILT SELF TEST X SENSOR CDC DEMOD RFILT 32k⍀ ADXL202/ ADXL210 X OUT DUTY CYCLE MODULATOR (DCM) C O U N T E R OSCILLATOR RFILT...