Datasheet ADXL326 Datasheet (ANALOG DEVICES)

Small, Low Power, 3-Axis ±16 g

V

FEATURES

3-axis sensing
Small, low profile package

4 mm × 4 mm × 1.45 mm LFCSP
Low power: 350 μA typical
Single-supply operation: 1.8 V to 3.6 V
10,000 g shock survival
Excellent temperature stability
Bandwidth adjustment with a single capacitor per axis
RoHS/WEEE lead-free compliant

APPLICATIONS

Cost-sensitive, low power, motion- and tilt-sensing applications

Mobile devices

Gaming systems

Disk drive protection

Image stabilization

Sports and health devices

Accelerometer

ADXL326

GENERAL DESCRIPTION

The ADXL326 is a small, low power, complete 3-axis
accelerometer with signal conditioned voltage outputs. The
product measures acceleration with a minimum full-scale range
of ±16 g. It can measure the static acceleration of gravity in tilt­sensing applications, as well as dynamic acceleration, resulting
from motion, shock, or vibration.

The user selects the bandwidth of the accelerometer using
the C

, CY, and CZ capacitors at the X

X

Bandwidths can be selected to suit the application with a
range of 0.5 Hz to 1600 Hz for X and Y axes and a range of

0.5 Hz to 550 Hz for the Z axis.
The ADXL326 is available in a small, low profile, 4 mm ×

4 mm × 1.45 mm, 16-lead, plastic lead frame chip scale package
(LFCSP_LQ).

OUT

, Y

OUT

, and Z

OUT

pins.

FUNCTIONAL BLOCK DIAGRAM

+3

V

S

ADXL326

OUTPUT AMP

3-AXIS

SENSOR

C

DC

COM ST

AC AMP DEMOD

Figure 1.

OUTPUT AMP

OUTPUT AMP

~32kΩ

~32kΩ

~32kΩ

X

OUT

C

X

Y

OUT

C

Y

Z

OUT

C

Z

7948-001

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.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: [phone] www.analog.com
Fax: [phone] ©2009 Analog Devices, Inc. All rights reserved.

ADXL326

TABLE OF CONTENTS

Features .............................................................................................. 1

Applications ....................................................................................... 1 

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

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

Revision History ............................................................................... 2

Specifications ..................................................................................... 3

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

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

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

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

Theory of Operation ...................................................................... 10

Mechanical Sensor ...................................................................... 10

REVISION HISTORY

8/09—Revision 0: Initial Version

Performance ................................................................................ 10 

Applications Information .............................................................. 11

Power Supply Decoupling ......................................................... 11

Setting the Bandwidth Using CX, CY, and CZ .......................... 11

Self Test ........................................................................................ 11

Design Trade-Offs for Selecting Filter Characteristics: The

Noise/BW Trade-Off .................................................................. 11

Use with Operating Voltages Other Than 3 V .......................... 11

Axes of Acceleration Sensitivity ............................................... 12

Layout and Design Recommendations ................................... 13

Outline Dimensions ....................................................................... 14

Ordering Guide .......................................................................... 14



Rev. 0 | Page 2 of 16

ADXL326

SPECIFICATIONS

TA = 25°C, VS = 3 V, CX = CY = CZ = 0.1 µF, acceleration = 0 g, unless otherwise noted. All minimum and maximum specifications are
guaranteed. Typical specifications are not guaranteed.

Table 1.

Parameter Conditions Min Typ Max Unit

SENSOR INPUT Each axis

Measurement Range ±16 ±19
Nonlinearity Percent of full scale ±0.3 %
Package Alignment Error ±1 Degrees
Interaxis Alignment Error ±0.1 Degrees
Cross Axis Sensitivity1 ±1 %

SENSITIVITY (RATIOMETRIC)2 Each axis

Sensitivity at X
Sensitivity Change Due to Temperature3 V

OUT

, Y

, Z

V

OUT

OUT

= 3 V 51 57 63 mV/g

S

= 3 V ±0.01 %/°C

S

ZERO g BIAS LEVEL (RATIOMETRIC)

0 g Voltage at X
0 g Voltage at Z

, Y

V

OUT

OUT

V

OUT

= 3 V 1.35 1.5 1.65 V

S

= 3 V 1.2 1.5 1.8 V

S

0 g Offset vs. Temperature ±1 mg/°C

NOISE PERFORMANCE

Noise Density X

OUT

, Y

, Z

300 μg/√Hz rms

OUT

OUT

FREQUENCY RESPONSE4

Bandwidth X
Bandwidth Z
R

Tolerance 32 ± 15% kΩ

FILT

5

, Y

OUT

OUT

No external filter 1600 Hz

OUT

5

No external filter 550 Hz

Sensor Resonant Frequency 5.5 kHz

SELF TEST6

Logic Input Low +0.6 V
Logic Input High +2.4 V
ST Actuation Current +60 μA
Output Change at X
Output Change at Y
Output Change at Z

Self test 0 to 1 −29 −62 −114 mV

OUT

Self test 0 to 1 +29 +62 +114 mV

OUT

Self test 0 to 1 +29 +105 +190 mV

OUT

OUTPUT AMPLIFIER

Output Swing Low No load 0.1 V
Output Swing High No load 2.8 V

POWER SUPPLY

Operating Voltage Range 1.8 3.6 V
Supply Current VS = 3 V 350 μA
Turn-On Time7 No external filter 1 ms

TEMPERATURE

Operating Temperature Range −40 +85 °C

1

Defined as coupling between any two axes.

2

Sensitivity is essentially ratiometric to VS.

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 filter capacitors (CX, CY, CZ).

5

Bandwidth with external capacitors = 1/(2 × π × 32 kΩ × C). For CX, CY = 0.003 μF, bandwidth = 1.6 kHz. For CZ = 0.01 μF, bandwidth = 500 Hz. For CX, CY, CZ = 10 μF,

bandwidth = 0.5 Hz.

6

Self test response changes cubically with VS.

7

Turn-on time is dependent on CX, CY, CZ and is approximately 160 × CX or CY or CZ + 1 ms, where CX, CY, CZ are in μF.

g

Rev. 0 | Page 3 of 16

ADXL326

ABSOLUTE MAXIMUM RATINGS

Table 2.

Parameter Rating

Acceleration (Any Axis, Unpowered) 10,000 g
Acceleration (Any Axis, Powered) 10,000 g
VS −0.3 V to +3.6 V
All Other Pins (COM − 0.3 V) to (VS + 0.3 V)
Output Short-Circuit Duration

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

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. 0 | Page 4 of 16

ADXL326

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

S

V

14

ADXL326

TOP VIEW

+Z

+X

S

NC

13

12

X

OUT

11

+Y

NC

10

Y

OUT

9

NC

NC

COM

NC

1

2

ST

3

4

NC15V

16

(Not to Scale)

5678

COM

COM

NC = NO CONNECT

OUT

COM

Z

07948-003

Figure 2. Pin Configuration

Table 3. Pin Function Descriptions

Pin No. Mnemonic Description

1 NC No Connect (or Optionally Ground)
2 ST Self Test
3 COM Common
4 NC No Connect
5 COM Common
6 COM Common
7 COM Common
8 Z

Z Channel Output

OUT

9 NC No Connect (or Optionally Ground)
10 Y

Y Channel Output

OUT

11 NC No Connect
12 X

X Channel Output

OUT

13 NC No Connect
14 V

S

Supply Voltage (1.8 V to 3.6 V)
15 VS Supply Voltage (1.8 V to 3.6 V)
16 NC No Connect
EP Exposed pad Not internally connected. Solder for mechanical integrity.

Rev. 0 | Page 5 of 16

ADXL326

A

A

A

A

A

A

TYPICAL PERFORMANCE CHARACTERISTICS

N > 1000 for all typical performance plots, unless otherwise noted.

90

80

70

60

50

TION (%)

40

POPUL

30

20

10

0

1.46 1.47 1.48 1.49 1.51 1.52 1.53 1.54

1.50

OUTPUT (V)

Figure 3. X-Axis Zero g Bias at 25°C, VS = 3 V

100

90

80

70

60

TION (%)

50

40

POPUL

30

20

10

0

1.46 1.47 1.48 1.49 1.50 1.51 1.52 1.53 1.54

OUTPUT (V)

Figure 4. Y-Axis Zero g Bias at 25°C, VS = 3 V

80

07948-005

7948-006

40

30

TION (%)

20

POPUL

10

0

–62 –60 –58 –56 –54 –52 –50

VOLTAGE (mV)

Figure 6. X-Axis Self Test Response at 25°C, VS = 3 V

40

30

TION (%)

20

POPUL

10

0

52 54 56 58 60 62 64 66

VOLTAGE (mV)

Figure 7. Y-Axis Self Test Response at 25°C, VS = 3 V

30

07948-008

07948-009

70

60

50

TION (%)

40

30

POPUL

20

10

0

1.46 1.47 1.48 1.49 1.50 1.51 1.52 1.53 1.54

OUTPUT (V)

Figure 5. Z-Axis Zero g Bias at 25°C, VS = 3 V

07948-007

20

TION (%)

POPUL

10

0

90 92 94 96 98 100 102 104

VOLTAGE (mV)

Figure 8. Z-Axis Self Test Response at 25°C, VS = 3 V

07948-010

Rev. 0 | Page 6 of 16

ADXL326

A

A

A

65

60

55

50

45

40

35

TION (%)

30

25

POPUL

20

15

10

5

0

–2.5 –2.0 –1.5 –1.0 –0.5 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5

TEMPERATURE COEFF ICIENT ( m

g

/°C)

Figure 9. X-Axis Zero g Bias Temperature Coefficient, VS = 3 V

70

60

50

40

TION (%)

30

POPUL

20

10

07948-011

1.53

N = 8

1.52

1.51

1.50

OUTPUT (V)

1.49

1.48

–40 –30 –20 –10 0 10 20 30 40 50 60 70 80 90 100

TEMPERATURE (°C)

07948-014

Figure 12. X-Axis Zero g Bias vs. Temperature, Eight Parts Soldered to PCB

1.53

N = 8

1.52

1.51

1.50

OUTPUT (V)

1.49

0

–2.5 –2.0 –1.5 –1.0 –0.5 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5

TEMPERATURE COEFF ICIENT ( mg/°C)

Figure 10. Y-Axis Zero g Bias Temperature Coefficient, VS = 3 V

30

25

20

TION (%)

15

POPUL

10

5

0

–2.5 –2.0 –1.5 –1.0 –0.5 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5

TEMPERATURE COEFF ICIENT ( m

g

/°C)

Figure 11. Z-Axis Zero g Bias Temperature Coefficient, VS = 3 V

1.48
–40 –30 –20 –10 0 10 20 30 40 50 60 70 80 90 1 00

07948-012

TEMPERATURE (°C)

07948-015

Figure 13. Y-Axis Zero g Bias vs. Temperature, Eight Parts Soldered to PCB

1.530
N = 8

1.525

1.520

1.515

1.510

1.505

1.500

OUTPUT (V)

1.495

1.490

1.485

1.480

–40 –30 –20 –10 0 10 20 30 40 50 60 70 80 90 100

07948-013

TEMPERATURE (°C)

07948-016

Figure 14. Z-Axis Zero g Bias vs. Temperature, Eight Parts Soldered to PCB

Rev. 0 | Page 7 of 16

ADXL326

A

A

A

35

30

N = 8

0.061

25

20

TION (%)

15

POPUL

10

5

0

0.053 0.054 0.055 0.056 0.057 0.058 0.059 0.060 0.061

SENSITIVITY (V/g)

Figure 15. X-Axis Sensitivity at 25°C, VS = 3 V

55

50

45

40

35

30

TION (%)

25

20

POPUL

15

10

5

0

0.053 0.054 0.055 0.056 0.057 0.058 0.059 0.060 0.061

SENSITIVITY (V/g)

Figure 16. Y-Axis Sensitivity at 25°C, VS = 3 V

40

35

0.059

0.057

0.055

SENSITIVITY (V/g)

0.053

0.051

–40 –30 –20 –10 0 10 20 30 40 50 60 70 80 90 100

07948-017

TEMPERATURE (°C)

07948-020

Figure 18. X-Axis Sensitivity vs. Temperature,

Eight Parts Soldered to PCB, V

N = 8

0.061

0.059

0.057

0.055

SENSITIVITY (V/g)

0.053

0.051
–40 –30 –20 –10 0 10 20 30 40 50 60 70 80 90 100

07948-018

TEMPERATURE (°C)

= 3 V

S

07948-021

Figure 19. Y-Axis Sensitivity vs. Temperature,

Eight Parts Soldered to PCB, V

N = 8

0.061

= 3 V

S

30

25

TION (%)

20

15

POPUL

10

5

0

0.053 0.054 0.055 0.056 0.05 7 0.058 0.059 0.060

SENSITIVITY (V/

g

)

Figure 17. Z-Axis Sensitivity at 25°C, VS = 3 V

0.061

07948-019

0.059

)

g

0.057

0.055

SENSITIVITY (V/

0.053

0.051
–40 –30 –20 –10 0 10 20 30 40 50 60 70 80 90 100

TEMPERATURE (°C)

Figure 20. Z-Axis Sensitivity vs. Temperature,

Eight Parts Soldered to PCB, V

= 3 V

S

07948-022

Rev. 0 | Page 8 of 16

ADXL326

600

500

400

300

CURRENT (µA)

200

100

0

1.5 2.0 2.5 3.0 3.5 4.0

SUPPLY (V)

Figure 21. Typical Current Consumption vs. Supply Voltage

CH4: Z

CH3: Y

CH2: X

4

3

2

1

07948-023

OUTPUTS ARE OFFSET
FOR CLARITY

TIME (1ms/DIV)

Figure 22. Typical Turn-On Time, V

= CY = CZ = 0.0047 μF

C

X

, 500mV/DIV

OUT

, 500mV/DI V

OUT

, 500mV/DI V

OUT

CH1: POWER, 2V/DIV

= 3 V,

S

07948-024

Rev. 0 | Page 9 of 16

ADXL326

THEORY OF OPERATION

The ADXL326 is a complete 3-axis acceleration measurement
system. The ADXL326 has a measurement range of ±16 g
minimum. It contains a polysilicon surface micromachined
sensor and signal conditioning circuitry to implement an open­loop acceleration measurement architecture. The output signals
are analog voltages that are proportional to acceleration. The
accelerometer can measure the static acceleration of gravity in
tilt sensing applications, as well as dynamic acceleration, resulting
from motion, shock, or vibration.

The sensor is a polysilicon surface micromachined structure
built on top of a silicon wafer. Polysilicon springs suspend the
structure over the surface of the wafer and provide a resistance
against acceleration forces. Deflection of the structure is measured
using a differential capacitor that consists of independent fixed
plates and plates attached to the moving mass. The fixed plates
are driven by 180° out-of-phase square waves. Acceleration deflects
the moving mass and unbalances the differential capacitor resulting
in a sensor output whose amplitude is proportional to acceleration.
Phase-sensitive demodulation techniques are then used to
determine the magnitude and direction of the acceleration.

The demodulator output is amplified and brought off-chip through
a 32 kΩ resistor. The user then sets the signal bandwidth of the
device by adding a capacitor. This filtering improves measurement
resolution and helps prevent aliasing.

MECHANICAL SENSOR

The ADXL326 uses a single structure for sensing the X, Y, and Z axes.
As a result, the three axes sense directions are highly orthogonal
with little cross-axis sensitivity. Mechanical misalignment of the
sensor die to the package is the chief source of cross-axis sensitivity.
Mechanical misalignment can, of course, be calibrated out at
the system level.

PERFORMANCE

Rather than using additional temperature compensation circuitry,
innovative design techniques ensure that high performance is built­in to the ADXL326. As a result, there is neither quantization error
nor nonmonotonic behavior, and temperature hysteresis is very
low (typically <3 mg over the −25°C to +70°C temperature range).

Rev. 0 | Page 10 of 16

ADXL326

APPLICATIONS INFORMATION

POWER SUPPLY DECOUPLING

For most applications, a single 0.1 µF capacitor, CDC, placed
close to the ADXL326 supply pins adequately decouples the
accelerometer from noise on the power supply. However, in
applications where noise is present at the 50 kHz internal clock
frequency (or any harmonic thereof), additional care in power
supply bypassing is required because this noise can cause errors
in acceleration measurement. If additional decoupling is needed, a
100 Ω (or smaller) resistor or ferrite bead can be inserted in the
supply line. Additionally, a larger bulk bypass capacitor (1 µF or
greater) can be added in parallel to C

. Ensure that the connection

DC

from the ADXL326 ground to the power supply ground is low
impedance because noise transmitted through ground has a
similar effect as noise transmitted through V

.

S

SETTING THE BANDWIDTH USING CX, CY, AND CZ

The ADXL326 has provisions for band limiting the X

pins. Capacitors must be added at these pins to implement

Z

OUT

low-pass filtering for antialiasing and noise reduction. The 3 dB
bandwidth equation is

f

= 1/(2π(32 kΩ) × C

−3 dB

(X, Y, Z)

)

or more simply

f

= 5 F/C

–3 dB

The tolerance of the internal resistor (R

(X, Y, Z)

) typically varies as

FILT

much as ±15% of its nominal value (32 kΩ), and the bandwidth
varies accordingly. A minimum capacitance of 0.0047 µF for C
C

, and CZ is recommended in all cases.

Y

Table 4. Filter Capacitor Selection, C

, CY, and CZ

X

Bandwidth (Hz) Capacitor (μF)

1 4.7
10 0.47
50 0.10
100 0.05
200 0.027
500 0.01

OUT

, Y

OUT

, and

,

X

SELF TEST

The ST pin controls the self test feature. When this pin is set to

, an electrostatic force is exerted on the accelerometer beam.

V

S

The resulting movement of the beam allows the user to test
whether the accelerometer is functional. The typical change in
output is −1.08 g (corresponding to −62 mV) in the X axis, +1.08 g
(+62 mV) on the Y axis, and +1.83 g (+105 mV) on the Z axis.
This ST pin can be left open circuit or connected to common
(COM) in normal use.

Never expose the ST pin to voltages greater than V
this cannot be guaranteed due to the system design (for instance,
there are multiple supply voltages), then a low V
diode between ST and V

is recommended.

S

+ 0.3 V. If

S

clamping

F

Rev. 0 | Page 11 of 16

DESIGN TRADE-OFFS FOR SELECTING FILTER CHARACTERISTICS: THE NOISE/BW TRADE-OFF

The selected accelerometer bandwidth ultimately determines
the measurement resolution (smallest detectable acceleration).
Filtering can be used to lower the noise floor to improve the
resolution of the accelerometer. Resolution is dependent on the
analog filter bandwidth at X

OUT

, Y

OUT

, and Z

OUT

.

The output of the ADXL326 has a typical bandwidth greater
than 500 Hz. The user must filter the signal at this point to limit
aliasing errors. The analog bandwidth must be no more than half
the analog-to-digital sampling frequency to minimize aliasing.
The analog bandwidth can be further decreased to reduce noise
and improve resolution.

The ADXL326 noise has the characteristics of white Gaussian
noise, which contributes equally at all frequencies and is described
in terms of µg/√Hz (the noise is proportional to the square root
of the accelerometer bandwidth). The user should limit bandwidth
to the lowest frequency needed by the application to maximize
the resolution and dynamic range of the accelerometer.

With the single-pole roll-off characteristic, the typical noise of
the ADXL326 is determined by

rms Noise = Noise Density ×

)1.6( ×BW

Often, the peak value of the noise is desired. Peak-to-peak noise
can only be estimated by statistical methods. Tab le 5 is useful for
estimating the probabilities of exceeding various peak values, given
the rms value.

Table 5. Estimation of Peak-to-Peak Noise

% of Time That Noise Exceeds

Peak-to-Peak Value

Nominal Peak-to-Peak Value

2 × rms 32
4 × rms 4.6
6 × rms 0.27
8 × rms 0.006

USE WITH OPERATING VOLTAGES OTHER THAN 3 V

The ADXL326 is tested and specified at VS = 3 V; however, it can be
powered with V
performance parameters change as the supply voltage is varied.

The ADXL326 output is ratiometric; therefore, the output
sensitivity (or scale factor) varies proportionally to the supply
voltage. At V

= 2 V, the output sensitivity is typically 38 mV/g.

At V

S

The zero g bias output is also ratiometric; therefore, the zero g
output is nominally equal to V

The output noise is not ratiometric but is absolute in volts;
therefore, the noise density decreases as the supply voltage
increases. This is because the scale factor (mV/g) increases while
the noise voltage remains constant. At V
axis noise density is typically 120 µg/√Hz, while at V
X- and Y-axis noise density is typically 270 µg/√Hz.

as low as 1.8 V or as high as 3.6 V. Note that some

S

= 3.6 V, the output sensitivity is typically 68 mV/g.

S

/2 at all supply voltages.

S

= 3.6 V, the X- and Y-

S

= 2 V, the

S

ADXL326

A

X

Y

Z

Self test response in g is roughly proportional to the square of
the supply voltage. However, when ratiometricity of sensitivity
is factored in with supply voltage, the self test response in volts
is roughly proportional to the cube of the supply voltage.

For example, at V

= 3.6 V, the self test response for the

S

ADXL326 is approximately −107 mV for the X axis, +107 mV
for the Y axis, and +181 mV for the Z axis. At V

= 2 V, the self

S

test response is approximately −18 mV for the X axis, +18 mV
for the Y axis, and −31 mV for the Z axis.

The supply current decreases as the supply voltage decreases.
Typical current consumption at V
typical current consumption at V

= 3.6 V is 375 µA, and

S

= 2 V is 200 µA.

S

X

= –1g

OUT

Y

= 0g

OUT

Z

= 0g

OUT

AXES OF ACCELERATION SENSITIVITY

Z

A

Y

T

O

P

A

X

07948-025

Figure 23. Axes of Acceleration Sensitivity (Corresponding Output Voltage

Increases When Accelerated Along the Sensitive Axis)

TOP

GRAVITY

= 0g

OUT
OUT

OUT

= 0g
= 1g
= 0g

TOP

TOP

TOP

X

= 1g

OUT

Y

= 0g

OUT

Z

= 0g

OUT

X

OUT

Y

= –1g

OUT

Z

= 0g

OUT

T

O

P

= 0g

X

OUT

Y

= 0g

OUT

Z

= 1g

OUT

= 0g

X

OUT

Y

= 0g

OUT

Z

= –1g

OUT

07948-026

Figure 24. Output Response vs. Orientation to Gravity

Rev. 0 | Page 12 of 16

ADXL326

C

LAYOUT AND DESIGN RECOMMENDATIONS

The recommended soldering profile is shown in Figure 25, followed by a description of the profile features in Table 6. The recommended
PCB layout or solder land drawing is shown in Figure 26.

CRITICAL ZONE

t

L

T

TO T

L

P

TEMPERATURE

t

T

P

T

L

T

SMAX

T

SMIN

PREHEAT

RAMP-UP

t

S

P

RAMP-DOWN

t25°C TO PE AK

TIME

07948-002

Figure 25. Recommended Soldering Profile

Table 6. Recommended Soldering Profile

Profile Feature Sn63/Pb37 Pb-Free

Average Ramp Rate (TL to TP) 3°C/sec maximum 3°C/sec maximum
Preheat

Minimum Temperature (T
Maximum Temperature (T
Time (T

T

to TL

SMAX

SMIN

to T

), tS 60 sec to 120 sec 60 sec to 180 sec

SMAX

) 100°C 150°C

SMIN

) 150°C 200°C

SMAX

Ramp-Up Rate 3°C/sec maximum 3°C/sec maximum

Time Maintained Above Liquidous (TL)

Liquidous Temperature (TL) 183°C 217°C

Time (tL) 60 sec to 150 sec 60 sec to 150 sec
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 sec to 30 sec 20 sec to 40 sec
Ramp-Down Rate 6°C/sec maximum 6°C/sec maximum
Time 25°C to Peak Temperature 6 minutes maximum 8 minutes maximum

0.50
MAX

0.65 0.325

4

0.35

MAX

1.95

ENTER PAD IS NO T
INTERNALLY CONNECTED
BUT SHOULD BE SOLDERED
FOR MECHANICAL INTEGRIT Y

1.95

DIMENSIONS SHOWN IN MILLIMETERS

0.65

0.325

4

07948-004

Figure 26. Recommended PCB Layout

Rev. 0 | Page 13 of 16

ADXL326

OUTLINE DIMENSIONS

0.20 MIN

13

12

EXPOSED

PAD

(BOTTOM VIE W)

9

8

1.95 BSC

FOR PROPER CONNECTION OF
THE EXPOSED PAD, REFER TO
THE PIN CONF IGURATIO N AND
FUNCTION DES CRIPTIONS
SECTION OF THIS DATA SHEET.

PIN 1

INDICATOR

1.50

1.45

1.40
SEATING
PLANE

TOP VIEW

0.20 MIN

4.15

4.00 SQ

3.85

0.65 BSC

0.55

0.50

0.45

0.05 MAX

0.02 NOM

0.35
COPLANARITY

0.30

0.25

*

0.05

STACKED DIE WI TH GLASS SEAL.

Figure 27. 16-Lead Lead Frame Chip Scale Package [LFCSP_LQ]

4 mm × 4 mm Body, 1.45 mm Thick Quad

(CP-16-5a*)

Dimensions shown in millimeters

ORDERING GUIDE

Model Measurement Range Specified Voltage Temperature Range Package Description Package Option

ADXL326BCPZ1 ±16 g 3 V −40°C to +85°C 16-Lead LFCSP_LQ CP-16-5a
ADXL326BCPZ–RL1 ±16 g 3 V −40°C to +85°C 16-Lead LFCSP_LQ CP-16-5a
ADXL326BCPZ–RL71 ±16 g 3 V −40°C to +85°C 16-Lead LFCSP_LQ CP-16-5a
EVAL-ADXL326Z1 Evaluation Board

1

Z = RoHS Compliant Part.

PIN 1
INDICATOR

16

1

2.43

1.75 SQ

1.08

4

5

112008-A

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ADXL326

NOTES

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ADXL326

NOTES

Analog Devices offers specific products designated for automotive applications; please consult your local Analog Devices sales representative for details. Standard products sold by
Analog Devices are not designed, intended, or approved for use in life support, implantable medical devices, transportation, nuclear, safety, or other equipment where malfunction
of the product can reasonably be expected to result in personal injury, death, severe property damage, or severe environmental harm. Buyer uses or sells standard products for use
in the above critical applications at Buyer's own risk and Buyer agrees to defend, indemnify, and hold harmless Analog Devices from any and all damages, claims, suits, or expenses
resulting from such unintended use.

©2009 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D07948-0-8/09(0)

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