REV. A

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

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

otherwise under any patent or patent rights of Analog Devices.

a

ADXL105*

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

Tel: 781/329-4700

World Wide Web Site: http://www.analog.com

Fax: 781/326-8703

© Analog Devices, Inc., 1999

*Patent Pending.

FEATURES

Monolithic IC Chip

2 m

g Resolution

10 kHz Bandwidth

Flat Amplitude Response ( 1%) to 5 kHz

Low Bias and Sensitivity Drift

Low Power 2 mA

Output Ratiometric to Supply

User Scalable

g Range

On-Board Temperature Sensor

Uncommitted Amplifier

Surface Mount Package

+2.7 V to +5.25 V Single Supply Operation

1000

g Shock Survival

APPLICATIONS

Automotive

Accurate Tilt Sensing with Fast Response

Machine Health and Vibration Measurement

Affordable Inertial Sensing of Velocity and Position

Seismic Sensing

Rotational Acceleration

GENERAL DESCRIPTION

The ADXL105 is a high performance, high accuracy and com-

plete single-axis acceleration measurement system on a single

monolithic IC. The ADXL105 offers significantly increased

bandwidth and reduced noise versus previously available micro-

machined devices. The ADXL105 measures acceleration with a

full-scale range up to

±5 g and produces an analog voltage out-

put. Typical noise floor is 225

µg√Hz allowing signals below

2mg to be resolved. A 10 kHz wide frequency response enables

vibration measurement applications. The product exhibits signifi-

cant reduction in offset and sensitivity drift over temperature

compared to the ADXL05.

The ADXL105 can measure both dynamic accelerations, (typi-

cal of vibration) or static accelerations (such as inertial force,

gravity or tilt).

Output scale factors from 250 mV/g to 1.5 V/g are set using the

on-board uncommitted amplifier and external resistors. The

device features an on-board temperature sensor with an output

of 8 mV/

°C for optional temperature compensation of offset vs.

temperature for high accuracy application.

The ADXL105 is available in a hermetic 14-lead surface mount

Cerpak with versions specified for the 0

°C to +70°C, and

–40

°C to +85°C temperature ranges.

High Accuracy

1

g to

5

g Single Axis

FUNCTIONAL BLOCK DIAGRAM

ST

COM

UNCOMMITTED

AMPLIFIER

ADXL105

X SENSOR

TEMP

SENSOR

COM