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ADXL213

Part Number	ADXL213
Manufacturer	Analog Devices
Description	Low Cost 1.2 g Dual Axis Accelerometer
Published	Nov 13, 2008
Detailed Description	Low Cost ±1.2 g Dual Axis Accelerometer ADXL213 FEATURES Dual axis accelerometer on a single IC chip 5 mm × 5 mm × 2 mm ...
Datasheet	ADXL213 PDF File

Overview

Low Cost ±1.
2 g Dual Axis Accelerometer ADXL213 FEATURES Dual axis accelerometer on a single IC chip 5 mm × 5 mm × 2 mm LCC package 1 mg resolution at 60 Hz Low power: 700 µA at VS = 5 V (typical) High zero g bias stability High sensitivity accuracy Pulse width modulated digital outputs www.
DataSheet4U.
com X and Y axes aligned to within 0.
1° (typical) BW adjustment with a single capacitor Single-supply operation 3500 g shock survival GENERAL DESCRIPTION The ADXL213 is a low cost, low power, complete dual axis accelerometer with signal conditioned, duty cycle modulated outputs, all on a single monolithic IC.
The ADXL213 measures acceleration with a full-scale range of ±1.
2 g (typical).
The ADXL213 can measure both dynamic acceleration (e.
g.
, vibration) and static acceleration (e.
g.
, gravity).
The outputs are digital signals whose duty cycles (ratio of pulse width to period) are proportional to acceleration (30%/g).
The duty cycle outputs can be directly measured by a microcontroller without an A/D converter or glue logic.
Innovative design techniques are used to ensure high zero g bias stability (typically better than 0.
25 mg/°C), as well as tight sensitivity stability (typically better than 50 ppm/°C).
The typical noise floor is 160 µg/√Hz, allowing signals below 1 mg (0.
06° of inclination) to be resolved in tilt sensing applications using narrow bandwidths (<60 Hz).
The user selects the bandwidth of the accelerometer using capacitors CX and CY at the XFILT and YFILT pins.
Bandwidths of 0.
5 Hz to 250 Hz may be selected to suit the application.
The ADXL213 is available in a 5 mm × 5 mm × 2 mm, 8-pad hermetic LCC package.
APPLICATIONS Automotive tilt alarms Data projectors Navigation Platform stabilization/leveling Alarms and motion detectors High accuracy, 2-axis tilt sensing FUNCTIONAL BLOCK DIAGRAM +VS +VS CY YFILT ADXL213 CDC OUTPUT AMP DEMOD OUTPUT AMP 32kΩ 32kΩ YOUT DCM XOUT AC AMP SENSOR COM ST XFILT CX T2 RSET T2 T1 A(g) = (T1/T2 – 0.
5)/30% 0g = 50% ...

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