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ADXL202E

Analog Devices
Part Number ADXL202E
Manufacturer Analog Devices
Description Dual-Axis Accelerometer
Published Mar 23, 2005
Detailed Description a Low-Cost ؎2 g Dual-Axis Accelerometer with Duty Cycle Output ADXL202E* FUNCTIONAL BLOCK DIAGRAM 3V TO 5.25V CX VDD X ...
Datasheet PDF File ADXL202E PDF File

ADXL202E
ADXL202E

Overview
a Low-Cost ؎2 g Dual-Axis Accelerometer with Duty Cycle Output ADXL202E* 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 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 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 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 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.
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.
The duty cycle period is adjustable from 0.
5 ms to 10 ms via a single resistor (RSET).
The typical noise floor is 200 ␮g√Hz, allowing signals below 2 mg (at 60 Hz bandwidth) to be resolved.
The bandwidth of the accelerometer is set with capacitors CX and CY at the XFILT and YFILT pins.
An analog output can be reconstructed by filtering the duty cycle output.
The ADXL202E is available in 5 mm ϫ 5 mm ϫ 2 mm 8-lead hermetic LCC package.
*Patents Pending REV.
A Information furnished by Analo...


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