ADXL316 Datasheet PDF - Analog Devices

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ADXL316
Analog Devices

Part Number ADXL316
Description Accelerometer
Page 14 Pages


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Data Sheet
Small, Low Power,
3-Axis ±16 g Accelerometer
ADXL316
FEATURES
3-axis sensing with ±16 g minimum measurement range
Small, low profile package
12-lead, 4 mm × 4 mm × 1.45 mm LFCSP
Low quiescent supply current: 350 µA typical
Single-supply operation: 1.8 V to 3.6 V
10,000 g shock survival
Excellent temperature stability
Bandwidth (BW) adjustment with a single capacitor per axis
RoHS/WEEE lead-free compliant
−40°C to +105°C operating temperature range
Qualified for automotive applications
APPLICATIONS
Cost-sensitive, low power, motion and tilt sensing
applications
Mobile devices
Gaming systems
Disk drive protection
Image stabilization
Active noise control (ANC)
Sports and health devices
GENERAL DESCRIPTION
The ADXL316 is a small, thin, low power, complete 3-axis
accelerometer with signal conditioned voltage outputs, all on a
single monolithic IC. The product measures acceleration with a
minimum measurement range of ±16 g. It can measure the
static acceleration of gravity in tilt sensing applications, as well
as dynamic acceleration resulting from motion, shock, or
vibration.
The user selects the bandwidth of the accelerometer using
the CX, CY, and CZ capacitors at the XOUT, YOUT, and ZOUT pins.
Bandwidths can be selected to suit the application, with a
range of 0.5 Hz to 1600 Hz for the x and y axes, and a range
of 0.5 Hz to 550 Hz for the z axis.
The ADXL316 is available in a small, low profile, 4 mm × 4 mm ×
1.45 mm, 12-lead, plastic lead frame chip scale package (LFCSP).
FUNCTIONAL BLOCK DIAGRAM
3V
CDC
VS
ADXL316
3-AXIS
SENSOR
AC
AMP
COM
ST
DEMOD
RFILT
OUTPUT AMP
RFILT
OUTPUT AMP
RFILT
OUTPUT AMP
XOUT
CX
YOUT
CY
ZOUT
CZ
Figure 1.
Rev. 0
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ADXL316
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
Performance ................................................................................ 10
REVISION HISTORY
10/15—Revision 0: Initial Version
Data Sheet
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.............................. 12
Axes of Acceleration Sensitivity ............................................... 12
Layout and Design Recommendations........................................ 13
Outline Dimensions ....................................................................... 14
Ordering Guide .......................................................................... 14
Automotive Products ................................................................. 14
Rev. 0 | Page 2 of 14



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Data Sheet
ADXL316
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
SENSOR INPUT
Measurement Range1
Nonlinearity
Package Alignment Error
Interaxis Alignment Error
Cross Axis Sensitivity
SENSITIVITY (RATIOMETRIC)2
Sensitivity at XOUT, YOUT, and ZOUT
Sensitivity Change due to Temperature3
ZERO g BIAS LEVEL (RATIOMETRIC)
0 g Voltage at XOUT, YOUT, and ZOUT
Initial 0 g Output Deviation from Ideal
0 g Offset vs. Temperature
NOISE PERFORMANCE
Output Noise
Noise Density
XOUT and YOUT
ZOUT
FREQUENCY RESPONSE4
XOUT and YOUT Bandwidth5
ZOUT Bandwidth 5
RFILT Tolerance
Sensor Resonant Frequency
SELF TEST (ST)6
Logic Input Low
Logic Input High
ST Input Resistance to Ground
Output Change
At XOUT
At YOUT
At ZOUT
OUTPUT AMPLIFIER
Output Swing
Low
High
POWER SUPPLY
Operating Voltage Range
Quiescent Supply Current
Turn-On Time7
OPERATING TEMPERATURE RANGE
Test Conditions/Comments
Each axis
% of measurement range
Each axis
VS = 3 V
VS = 3 V
Each axis
VS = 3 V, 25°C
VS = 3 V, 25°C
<4 kHz, VS = 3 V
No external filter
No external filter
ST = 0 to ST = 1
No load
No load
Min Typ Max Unit
±16 ±19
±0.2
±1
±0.1
±1
g
%
Degrees
Degrees
%
50 57 64 mV/g
±0.5 mV
1.2 1.5 1.8 V
±100
mV
±1 mg/°C
1 mV
210 µg/√Hz rms
450 µg/√Hz rms
1600
Hz
550 Hz
27 32 37 kΩ
4.2 kHz
0.3 V
2.7 V
30 50
kΩ
−65 −50 −35 mV
35 50 65 mV
70 90 110 mV
0.1 V
2.8 V
1.8 3.6 V
350 µA
10 ms
−40 +105 °C
1 Guaranteed by measurement of initial offset and sensitivity.
2 Sensitivity is essentially ratiometric to VS. Calculate sensitivity by using a scale factor (mV/V/g). Sensitivity = Scale Factor × VS. To calculate minimum and maximum
sensitivity, the scale factors are 15 mV/V/g and 23 mV/V/g, respectively.
3 This parameter is 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, and CZ).
5 Bandwidth = 1/(2 × π × 32 kΩ × C). For CX, CY = 0.003 µF, the bandwidth = 1.6 kHz. For CZ = 0.01 µF, the bandwidth = 500 Hz. For CX, CY, and CZ = 10 µF, the bandwidth = 0.5 Hz.
6 Self test response changes cubically with VS.
7 Larger values of CX, CY, and CZ increase turn-on time. Turn-on time is approximately 160 × (CX, CY, and CZ) + 4 ms, where CX, CY, CZ are in µF.
Rev. 0 | Page 3 of 14



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ADXL316
ABSOLUTE MAXIMUM RATINGS
Table 2.
Parameter
Acceleration
Shock Survival, Any Axis, and Unpowered
Shock Survival, Any Axis, and Powered
VS
All Other Pins
Output Short-Circuit Duration (Any Pin to COM)
Temperature Range (Powered)
Rating
10,000 g
10,000 g
−0.3 V to +3.6 V
(COM − 0.3 V) to
(VS + 0.3 V)
Indefinite
−55°C to +125°C
Stresses at or above those listed under Absolute Maximum
Ratings may cause permanent damage to the product. This is a
stress rating only; functional operation of the product at these
or any other conditions above those indicated in the operational
section of this specification is not implied. Operation beyond
the maximum operating conditions for extended periods may
affect product reliability.
ESD CAUTION
Data Sheet
Rev. 0 | Page 4 of 14



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