Analog Devices ADXL103 203 Datasheet

Precision ±1.7 g

FEATURES

High performance, single/dual axis accelerometer on a

single IC chip
5 mm × 5 mm × 2 mm LCC package
1 mg resolution at 60 Hz
Low power: 700 µA at V
High zero g bias stability
High sensitivity accuracy
–40°C to +125°C temperature range
X and Y axes aligned to within 0.1° (typical)
BW adjustment with a single capacitor
Single-supply operation
3500 g shock survival

APPLICATIONS

Vehicle Dynamic Control (VDC)/Electronic Stability Program

(ESP) systems
Electronic chassis control
Electronic braking
Platform stabilization/leveling
Navigation
Alarms and motion detectors.
High accuracy, 2-axis tilt sensing

= 5 V (typical)

S

Single/Dual Axis Accelerometer

ADXL103/ADXL203

GENERAL DESCRIPTION

The ADXL103/ADXL203 are high precision, low power,
complete single and dual axis accelerometers with signal
conditioned voltage outputs, all on a single monolithic IC. The
ADXL103/ADXL203 measures acceleration with a full-scale
range of ±1.7 g . The ADXL103/ADXL203 can measure both
dynamic acceleration (e.g., vibration) and static acceleration
(e.g., gravity).

The typical noise floor is 110 μg/√Hz, allowing signals below
1 mg (0.06° of inclination) to be resolved in tilt sensing
applications using narrow bandwidths (<60 Hz).

The user selects the bandwidth of the accelerometer using
capacitors C

and CY at the X

X

0.5 Hz to 2.5 kHz may be selected to suit the application.

The ADXL103 and ADXL203 are available in 5 mm × 5 mm ×
2 mm, 8-pad hermetic LCC packages.

OUT

and Y

pins. Bandwidths of

OUT

FUNCTIONAL BLOCK DIAGRAM

+5V

V

S

ADXL103

C

DC

SENSOR

COM ST X

AC

AMP

DEMOD

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.
Specifications subject to change without notice. No license is granted by implication
or otherwise under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.

OUTPUT

AMP

R

FILT

32kΩ

OUT

C

X

Figure 1. ADXL103/ADXL203 Functional Block Diagram

+5V

V

S

ADXL203

C

DC

SENSOR

COM ST Y

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: [phone] www.analog.com
Fax: [phone] © 2004 Analog Devices, Inc. All rights reserved.

AC

AMP

DEMOD

R

FILT

32kΩ

OUTPUT

AMP

OUTPUT

AMP

R

FILT

32kΩ

OUT

C

Y

03757-0-001

X

OUT

C

X

ADXL103/ADXL203

TABLE OF CONTENTS

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

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

Typical Performance Characteristics ............................................. 5

Theory of Operation ........................................................................ 8

Performance .................................................................................. 8

Applications....................................................................................... 9

Power Supply Decoupling ........................................................... 9

Setting the Bandwidth Using CX and CY.................................... 9

REVISION HISTORY

Revision 0: Initial Version

Self Test...........................................................................................9

Design Trade-Offs for Selecting Filter Characteristics: The
Noise/BW Trade-Off

Using the ADXL103/ADXL203 with Operating Voltages
Other than 5 V

Using the ADXL203 as a Dual-Axis Tilt Sensor .................... 10

Pin Configurations and Functional Descriptions...................... 11

Outline Dimensions .......................................................................12

Ordering Guide .......................................................................... 12

.....................................................................9

............................................................................ 10

Rev. 0 | Page 2 of 12

ADXL103/ADXL203

SPECIFICATIONS

Table 1. TA = –40°C to +125°C, VS = 5 V, CX = CY = 0.1 μF, Acceleration = 0 g, unless otherwise noted.

Parameter Conditions Min Typ Max Unit

SENSOR INPUT Each Axis

Measurement Range
Nonlinearity % of Full Scale ±0.5 ±2.5 %
Package Alignment Error ±1 Degrees
Alignment Error (ADXL203) X Sensor to Y Sensor ±0.1 Degrees
Cross Axis Sensitivity ±2 ±5 %

SENSITIVITY (Ratiometric)

Sensitivity at X
Sensitivity Change due to Temperature

ZERO g BIAS LEVEL (Ratiometric) Each Axis

0 g Voltage at X
Initial 0 g Output Deviation from Ideal VS = 5 V, 25°C ±25 mg
0 g Offset vs. Temperature ±0.1 mg/°C

NOISE PERFORMANCE

Output Noise < 4 kHz, VS = 5 V, 25°C 1 6 mV rms
Noise Density @25°C 110 µg/√Hz rms

FREQUENCY RESPONSE

CX, CY Range
R

Tolerance 24 32 40 kΩ

FILT

5

Sensor Resonant Frequency 5.5 kHz

SELF TEST

6

Logic Input Low 1 V
Logic Input High 4 V
ST Input Resistance to Ground 30 50 kΩ
Output Change at X

OUTPUT AMPLIFIER

Output Swing Low No Load 0.3 V
Output Swing High No Load 4.5 V

POWER SUPPLY

Operating Voltage Range 3 6 V
Quiescent Supply Current 0.7 1.1 mA
Turn-On Time

OUT

OUT

, Y

, Y

OUT

1

OUT

4

±1.7

2

Each Axis
VS = 5 V 940 1000 1060 mV/g

3

VS = 5 V ±0.3 %

VS = 5 V 2.4 2.5 2.6 V

g

0.002 10 µF

, Y

OUT

OUT

7

Self Test 0 to 1 400 750 1100 mV

20 ms

1

Guaranteed by measurement of initial offset and sensitivity.

2

Sensitivity is essentially ratiometric to VS. For VS = 4.75 V to 5.25 V, sensitivity is 186 mV/V/g to 215 mV/V/g.

3

Defined as the output change from ambient-to-maximum temperature or ambient-to-minimum temperature.

4

Actual frequency response controlled by user-supplied external capacitor (CX, CY).

5

Bandwidth = 1/(2 × π × 32 kΩ × C). For CX, CY = 0.002 µF, Bandwidth = 2500 Hz. For CX, CY = 10 µF, Bandwidth = 0.5 Hz. Minimum/maximum values are not tested.

6

Self-test response changes cubically with VS.

7

Larger values of CX, CY will increase turn-on time. Turn-on time is approximately 160 × CX or CY + 4 ms, where CX, CY are in µF.

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

Rev. 0 | Page 3 of 12

ADXL103/ADXL203

ABSOLUTE MAXIMUM RATINGS

Table 2. ADXL103/ADXL203 Stress Ratings

Parameter Rating

Acceleration (Any Axis, Unpowered) 3,500 g
Acceleration (Any Axis, Powered) 3,500 g
Drop Test (Concrete Surface) 1.2 m
V

S

All Other Pins

–0.3 V to +7.0 V
(COM – 0.3 V) to

+ 0.3 V)

(V

S

Output Short-Circuit Duration
(Any Pin to Common) Indefinite

Operating Temperature Range –55°C to +125°C
Storage Temperature –65°C to +150°C

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.

T

P

T

L

T

SMAX

RAMP-UP

Table 3. Package Characteristics

Package Type θ

8-Lead CLCC 120°C/W 20°C/W <1.0 gram

t

P

CRITICAL ZONE

t

L

T

TO T

L

JA

θ

JC

Device Weight

P

T

SMIN

TEMPERATURE

t

S

PREHEAT

t

25°C TO PEAK

TIME

RAMP-DOWN

03757-0-002

Condition

Profile Feature

Sn63/Pb37 Pb Free

Average Ramp Rate (TL to TP) 3°C/second Max
Preheat

• Minimum Temperature (T

• Minimum Temperature (T

• Time (T

T

to T

SMAX

to T

SMAX

) (tS)

SMIN

L

• Ramp-Up Rate

SMIN

SMAX

)

)

100°C 150°C
150°C 200°C

60–120 seconds 60–150 seconds

3°C/second

Time Maintained above Liquidous (TL)

• Liquidous Temperature (T

• Time (t

)

L

)

L

183°C 217°C

60–150 seconds 60–150 seconds
Peak Temperature (TP) 240°C +0°C/–5°C 260°C +0°C/–5°C
Time within 5°C of Actual Peak Temperature (tP) 10–30 seconds 20–40 seconds

Ramp-Down Rate 6°C/second Max
Time 25°C to Peak Temperature 6 minutes Max 8 minutes Max

Figure 2. Recommended Soldering Profile

Rev. 0 | Page 4 of 12