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ADXL190 View Datasheet(PDF) - Analog Devices

Part NameADXL190 ADI
Analog Devices ADI
DescriptionLow Cost ±100g Single Axis Accelerometer with Analog Output
ADXL190 Datasheet PDF : 5 Pages
1 2 3 4 5
a
FEATURES
iMEMS® Single Chip IC Accelerometer
40 Milli-g Resolution
Low Power 2 mA
400 Hz Bandwidth
+5.0 V Single Supply Operation
2000 g Shock Survival
APPLICATIONS
Shock and Vibration Measurement
Machine Health
Shipping Recorders
Military Fuze, Safe and Arm
Low Cost ؎100g Single Axis
Accelerometer with Analog Output
ADXL190*
+VS
0.1F
FUNCTIONAL BLOCK DIAGRAM
TP
(DO NOT CONNECT)
+VS
ADXL190
2
GAIN
AMP
5k
SENSOR
DEMODULATOR
CLOCK
25k
BUFFER
AMP
9
SELF-TEST
COM
ZERO g ADJUST
VOUT
GENERAL DESCRIPTION
The ADXL190 is a complete acceleration measurement system
on a single monolithic IC. It contains a polysilicon surface-
micromachined sensor and signal conditioning circuitry to
implement an open-loop acceleration measurement architecture.
The ADXL190 is capable of measuring both positive and nega-
tive accelerations up to ± 100 g, making it suitable for shock and
vibration measurement.
Typical noise floor is 4 mg/Hz allowing signals below 40 milli-g
to be resolved. The ADXL190 can measure both dynamic accel-
erations, (typical of vibration) or static accelerations, (such as
inertial force or gravity).
The ADXL190 has a two-pole Bessel switched-capacitor filter.
Bessel filters, sometimes called linear phase filters, have a step
response with minimal overshoot and a maximally flat group
delay. The –3 dB frequency of the poles is preset at the factory
to 400 Hz. These filters are also completely self-contained and
buffered, requiring no external components.
The product features a built-in self-test feature that exercises
both the mechanical structure and electrical circuitry. When
triggered by a logic high on the self-test pin, an electrostatic
force acts on the beam equivalent to approximately 20% of full-
scale acceleration input, and thus a proportional voltage change
appears on the output pin. No external components other than a
decoupling capacitor are required.
The ADXL190 is available in a hermetic 14-lead surface mount
cerpak, specified over the –40°C to +105°C temperature range.
*Patent Pending.
iMEMS is a registered trademark of Analog Devices, Inc.
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
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 World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 1999
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