High Accuracy ؎1 g to ؎5 g Single Axis
a
i
MEMS® Accelerometer with Analog Input
ADXL105*
FUNCTIONAL BLOCK DIAGRAM
FEATURES
Monolithic IC Chip
2 mg Resolution
V
DD
10 kHz Bandwidth
Flat Amplitude Response (؎1%) to 5 kHz
Low Bias and Sensitivity Drift
Low Power 2 mA
ADXL105
TEMP
SENSOR
T
OUT
UNCOMMITTED
AMPLIFIER
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
ST
X SENSOR
COM
COM
A
V
V
V
UCA
OUT
OUT
MID
NIN
IN
APPLICATIONS
Automotive
Accurate Tilt Sensing with Fast Response
Machine Health and Vibration Measurement
Affordable Inertial Sensing of Velocity and Position
Seismic Sensing
Rotational Acceleration
The ADXL105 can measure both dynamic accelerations, (typi-
cal of vibration) or static accelerations (such as inertial force,
gravity or tilt).
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
2 mg 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.
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.
*Patent Pending.
i
MEMS is a registered trademark of Analog Devices, Inc.
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.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703
World Wide Web Site: http://www.analog.com
© Analog Devices, Inc., 1999