ANALOG DEVICES ADXL103 Service Manual

Precision ±1.7 g Single-/Dual-Axis

www.BDTIC.com/ADI

FEATURES

High performance, single-/dual-axis accelerometer

on a single IC chip
5 mm × 5 mm × 2 mm LCC package
1 mg resolutio
Low power: 700 μA at V
High zero g bias stabilit
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
RoHS-compliant
Compatible with Sn/Pb- and Pb-free solder processes

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

n at 60 Hz

= 5 V (typical)

S

y

MEMS® Accelerometer

i

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 measure acceleration with a full-scale
range of ±1.7 g. The ADXL103/ADXL203 can measure both
dynamic acceleration (for example, vibration) and static
acceleration (for example, gravity).

The typical noise floor is 110 g/
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
Ca

pacitor C

and Capacitor CY at the X

X

Bandwidths of 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-p

ad hermetic LCC packages.

√Hz, allowing signals below

OUT

and Y

OUT

pins.

FUNCTIONAL BLOCK DIAGRAM

+5V

V

S

ADXL103

C

DC

SENSOR

COM ST X

AC

AMP

DEMOD

Rev. A

Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Anal og Devices for its use, nor for any infringements of patents or ot her
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.

R

FILT

32kΩ

OUTPUT

AMP

OUT

C

X

+5V

V

S

ADXL203

C

DC

SENSOR

COM ST Y

Figure 1.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: [phone] www.analog.com
Fax: [phone] ©2006 Analog Devices, Inc. All rights reserved.

AC

AMP

DEMOD

R

FILT

32kΩ

OUTPUT

AMP

OUTPUT

AMP

R

FILT

32kΩ

OUT

C

Y

03757-001

X

OUT

C

X

ADXL103/ADXL203

www.BDTIC.com/ADI

TABLE OF CONTENTS

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

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

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

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

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

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

Pin Configurations and Function Descriptions........................... 5

Typical Performance Characteristics............................................. 6

Theory of Operation ........................................................................ 9

Performance.................................................................................. 9

REVISION HISTORY

3/06—Rev. 0 to Rev. A

Changes to Features.......................................................................... 1

hanges to Table 1............................................................................ 3

C

Changes to Figure 2.......................................................................... 4

Changes to Figure 3 and Figure 4 ................................................... 5

Changes to the Performance Section............................................. 9

Applications..................................................................................... 10

Power Supply Decoupling......................................................... 10

Setting the Bandwidth Using CX and C

Self Test........................................................................................ 10

Design Trade-Offs for Selecting Filter Characteristics:

The Noise/BW Trade-Off.......................................................... 10

Using the ADXL103/ADXL203 with Operating Voltages

Other than 5 V............................................................................ 11

Using the ADXL203 as a Dual-Axis Tilt Sensor .................... 11

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

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

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

Y

4/04—Revision 0: Initial Version

Rev. A | Page 2 of 12

ADXL103/ADXL203

www.BDTIC.com/ADI

SPECIFICATIONS

TA = −40°C to +125°C, VS = 5 V, CX = CY = 0.1 F, acceleration = 0 g, unless otherwise noted.

Table 1.

Parameter Conditions Min

SENSOR INPUT Each axis

Measurement Range

2

±1.7
Nonlinearity % of full scale ±0.2 ±1.25 %
Package Alignment Error ±1 Degrees
Alignment Error (ADXL203) X sensor to Y sensor ±0.1 Degrees
Cross-Axis Sensitivity ±1.5 ±3 %

SENSITIVITY (RATIOMETRIC)

Sensitivity at X

OUT

Sensitivity Change Due to Temperature

3

, Y

V

OUT

4

Each axis

= 5 V 960 1000 1040 mV/g

S

VS = 5 V ±0.3 %

ZERO g BIAS LEVEL (RATIOMETRIC) Each axis

0 g Voltage at X

, Y

V

OUT

OUT

= 5 V 2.4 2.5 2.6 V

S

Initial 0 g Output Deviation from Ideal VS = 5 V, 25°C ±25 mg
0 g Offset vs. Temperature ±0.1 ±0.8 mg/°C

NOISE PERFORMANCE

Output Noise <4 kHz, VS = 5 V 1 3 mV rms
Noise Density 110 μg/√Hz rms

FREQUENCY RESPONSE

CX, CY Range
R

Tolerance 24 32 40 kΩ

FILT

6

5

0.002 10 μF

Sensor Resonant Frequency 5.5 kHz

SELF TEST

7

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

, Y

Self Test 0 to Self Test 1 450 750 1100 mV

OUT

OUT

OUTPUT AMPLIFIER

Output Swing Low No load 0.05 0.2 V
Output Swing High No load 4.5 4.8 V

POWER SUPPLY

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

1

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

2

Guaranteed by measurement of initial offset and sensitivity.

3

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.

4

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

5

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

6

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.

7

Self-test response changes cubically with VS.

8

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

8

20 ms

1

Typ Max

1

Unit

g

Rev. A | Page 3 of 12

ADXL103/ADXL203

www.BDTIC.com/ADI

ABSOLUTE MAXIMUM RATINGS

Table 2.

Parameter Rating

Acceleration (Any Axis, Unpowered) 3500 g
Acceleration (Any Axis, Powered) 3500 g
Drop Test (Concrete Surface) 1.2 m
VS −0.3 V to +7.0 V
All Other Pins

(COM − 0.3 V) to

+ 0.3 V)

(V

S

Output Short-Circuit Duration

(Any Pin to Common) Indefinite
Temperature Range (Powered) −55°C to +125°C
Temperature Range (Storage) −65°C to +150°C

ESD CAUTION

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the
human body and test equipment and can discharge without detection. Although this product features
proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy
electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance
degradation or loss of functionality.

Stresses above those listed under Absolute Maximum Ratings
ma

y 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.

Table 3. Package Characteristics

Package Type θJA θ

Device Weight

JC

8-Lead CLCC 120°C/W 20°C/W <1.0 gram

CRITICAL ZONE

TO T

t

L

T

L

P

Condition

3°C/second

03757-002

t

T

P

T

L

T

SMAX

T

SMIN

TEMPERATURE

PREHEAT

t

25°C TO PEAK

Profile Feature

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

• Minimum Temperature (T

• Maximum Temperature (T

• Time (T

T

SMAX

• Ramp-Up Rate
Time Maintained above Liquidous (TL)

• Liquidous Temperature (T

• Time (t

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 to 30 seconds 20 to 40 seconds
Ramp-Down Rate 6°C/second max
Time 25°C to Peak Temperature 6 minutes max 8 minutes max

to T

SMIN

SMAX

to TL

)

L

SMIN

SMAX

) (tS)

)

L

Figure 2. Recommended Soldering Profile

RAMP-UP

t

S

)

)

P

RAMP-DOWN

TIME

Sn63/Pb37 Pb-Free

100°C 150°C
150°C 200°C
60 to 120 seconds 60 to 150 seconds

183°C 217°C
60 to 150 seconds 60 to 150 seconds

Rev. A | Page 4 of 12