REV. 0

Information furnished by Analog Devices is believed to be accurate and

reliable. However, no responsibility is assumed by Analog Devices for its

use, nor for any infringements of patents or other rights of third parties that

may result from its use. No license is granted by implication or otherwise

under any patent or patent rights of Analog Devices.

a

ADXL210E

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781/329-4700

www.analog.com

Fax: 781/326-8703

© Analog Devices, Inc., 2002

Low-Cost

10

g Dual-Axis

Accelerometer with Duty Cycle

FUNCTIONAL BLOCK DIAGRAM

ANALOG

TO

DUTY

CYCLE

(ADC)

C

O

U

N

T

E

R

P

DEMOD

DEMOD

32k

32k

ADXL210E

T2

SELF-TEST

OSCILLATOR

COM

Y SENSOR

X SENSOR

3V TO 5.25V

T1

T2

A(g) = (T1/T2 – 0.5)/4%

0g = 50% DUTY CYCLE

FEATURES

2-Axis Acceleration Sensor on a Single IC Chip

5 mm

5 mm

2 mm Ultrasmall Chip Scale Package

2m

g 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

GENERAL DESCRIPTION

The ADXL210E is a low-cost, low-power, complete 2-axis acceler-

ometer 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., vibra-

tion) 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 micro-

processor 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

The typical noise floor is 200 g

√Hz, allowing signals below

2mg (at 60 Hz bandwidth) to be resolved.

structed by filtering the duty cycle output.

The ADXL210E is available in a 5 mm

5 mm

2 mm 8-lead

hermetic LCC package.