ANALOG DEVICES ADXL193 Service Manual

Single-Axis, High-g,

FEATURES

Complete acceleration measurement system on a

single monolithic IC
Available in ±120 g or ±250 g output full-scale ranges
Full differential sensor and circuitry for high resistance

to EMI/RFI
Environmentally robust packaging
Complete mechanical and electrical self-test on

digital command
Output ratiometric to supply
Sensitive axes in the plane of the chip
High linearity (0.2% of full scale)
Frequency response down to dc
Low noise
Low power consumption (1.5 mA)
Tight sensitivity tolerance and 0 g offset capability
Largest available prefilter clipping headroom
400 Hz, 2-pole Bessel filter
Single-supply operation
Compatible with Sn/Pb and Pb-free solder processes
Qualified for automotive applications

®

iMEMS

Accelerometers

ADXL193

GENERAL DESCRIPTION

The ADXL193 is a low power, complete single-axis
accelerometer with signal conditioned voltage outputs that are
all on a single monolithic IC. This product measures
acceleration with a full-scale range of ±120 g or ±250 g
(minimum). It can also measure both dynamic acceleration
(vibration) and static acceleration (gravity).

The ADXL193 is a fourth-generation surface micromachined
iMEMS® accelerometer from ADI with enhanced performance
and lower cost. Designed for use in front and side impact airbag
applications, this product also provides a complete cost­effective solution useful for a wide variety of other applications.

The ADXL193 is temperature stable and accurate over the
automotive temperature range, with a self-test feature that fully
exercises all the mechanical and electrical elements of the
sensor with a digital signal applied to a single pin.

The ADXL193 is available in a 5 mm × 5 mm × 2 mm,
8-terminal ceramic LCC package.

APPLICATIONS

Vibration monitoring and control
Vehicle collision sensing
Shock detection

V

FUNCTIONAL BLOCK DIAGRAM

S

V

DD

V

DD2

EXC

TIMING

GENERATOR

DIFFERENTIAL

SENSOR

SELF-TEST

Figure 1.

DEMOD

AMP

ADXL193

400Hz

BESSEL

FILTER

X

OUT

05366-001

Rev. B

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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. Specifications subject to change without notice. No
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Tel: [phone] www.analog.com
Fax: [phone] ©2010 Analog Devices, Inc. All rights reserved.

ADXL193

TABLE OF CONTENTS

Features .............................................................................................. 1

Applications ....................................................................................... 1

General Description ......................................................................... 1

Functional Block Diagram .............................................................. 1

Specifications ..................................................................................... 3

Absolute Maximum Ratings ............................................................ 4

ESD Caution .................................................................................. 4

Pin Configuration and Function Descriptions ............................. 5

Theory of Operation ........................................................................ 7

REVISION HISTORY

8/10—Rev. A to Rev. B

Updated Format .................................................................. Universal

Change to Features Section ............................................................. 1

Updated Outline Dimensions ......................................................... 9

Changes to Ordering Guide ............................................................ 9

Added Automotive Products Section ............................................ 9

5/05—Rev. 0 to Rev. A

Applications ........................................................................................8

Power Supply Decoupling ............................................................8

Self-Test ..........................................................................................8

Clock Frequency Supply Response .............................................8

Signal Distortion ...........................................................................8

Outline Dimensions ..........................................................................9

ADXL193 Ordering Guide ...........................................................9

Automotive Products ....................................................................9

Rev. B | Page 2 of 12

ADXL193

SPECIFICATIONS1

At TA = −40°C to +105°C, 5.0 V dc ± 5%, acceleration = 0 g; unless otherwise noted.

Table 1.

Model No. AD22282 Model No. AD22283
Parameter Conditions Min Typ Max Min Typ Max Unit

SENSOR

Output Full-Scale Range I

≤ ±100 μA 120 250

OUT

Nonlinearity 0.2 2 0.2 2 %

Package Alignment Error 1 1 Degree

Cross-Axis Sensitivity −5 +5 −5 +5 %

Resonant Frequency 24 24 kHz

= 5 V, 100 Hz 17.1 18 18.9 7.6 8 8.4 mV/g

Sensitivity, Ratiometric

V

DD

(Over Temperature)

OFFSET

− VDD/2, VDD = 5 V −125 +125 −100 +100 mV

Zero-g Output Voltage

(Over Temperature)

2

V

OUT

NOISE

Noise Density 10 Hz − 400 Hz, 5 V 3 10 5 15 mg/√Hz

Clock Noise 5 5 mV p-p

FREQUENCY RESPONSE Two-pole Bessel

−3 dB Frequency 360 400 440 360 400 440 Hz

−3 dB Frequency Drift 25°C to T

MIN

or T

2 2 Hz

MAX

SELF-TEST

Output Change

(Cube vs. V

)3

DD

VDD = 5 V 400 500 600 200 250 300 mV

Logic Input High VDD = 5 V 3.5 3.5 V

Logic Input Low VDD = 5 V 1 1 V

Input Resistance Pull-down resistor to GND 30 50 30 50 kΩ

OUTPUT AMPLIFIER

Output Voltage Swing I

= ±400 μA 0.25 VDD − 0.25 0.25 VDD − 0.25 V

OUT

Capacitive Load Drive 1000 1000 pF

PREFILTER HEADROOM 800 1400
CFSR @ 400 kHz 2 1.5 V/V
POWER SUPPLY (VDD) 4.75 5.25 4.75 5.25 V

Functional Range 3.5 6 3.5 6 V

Quiescent Supply Current VDD = 5 V 1.5 2 1.5 2 mA

TEMPERATURE RANGE −40 +125 −40 +125 °C

1

All minimum and maximum specifications are guaranteed. Typical specifications are not guaranteed.

2

Zero g output is ratiometric.

3

Self-test output at VDD = (Self-Test Output at 5 V) × (VDD/5 V)3.

g

g

Rev. B | Page 3 of 12

ADXL193

ABSOLUTE MAXIMUM RATINGS

Table 2.

Parameter Rating

Acceleration (Any Axis, Unpowered) 4,000 g
Acceleration (Any Axis, Powered) 4,000 g
VS −0.3 V to +7.0 V
All Other Pins

Output Short-Circuit Duration

(Any Pin to Common)
Operating Temperature Range −65°C to +150°C
Storage Temperature −65°C to +150°C

(COM − 0.3 V) to

+ 0.3 V)

(V

S

Indefinite

Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.

ESD CAUTION

Rev. B | Page 4 of 12