Low Noise, Low Drift, Low Power,
3-Axis MEMS Accelerometers
ADXL356/ADXL357
Data Sheet
FEATURES
FUNCTIONAL BLOCK DIAGRAMS
V1P8ANA
LDO
VSUPPLY
V1P8DIG
RANGE
POWER
MANAGEMENT
LDO
XOUT
Y
X
ANALOG
FILTER
TEMP
SENSOR
TEMP
ST1
3-AXIS
SENSOR
ZOUT
CONTROL
LOGIC
ADXL356
VSSIO
ST2
STBY
VDDIO
15429-001
YOUT
Z
VSS
Figure 1. ADXL356
V1P8ANA
LDO
VSUPPLY
V1P8DIG
LDO
X
3-AXIS
SENSOR
APPLICATIONS
ADXL357
POWER
MANAGEMENT
ADC
Y
Z
VDDIO
DIGITAL
FILTER
ANALOG
FILTER
ADC
TEMP
SENSOR
ADC
FIFO
VSSIO
VSS
CONTROL
LOGIC
ADC
SERIAL
I/O
INT1
INT2
DRDY
CS/SCL
SCLK/VSSIO
MOSI/SDA
MISO/ASEL
15429-002
Hermetic package offers optimal long-term stability
0 g offset vs. temperature (all axes): 0.75 mg/°C maximum
Ultralow noise spectral density (all axes): 75 μg/√Hz
Low power, VSUPPLY (LDO regulator enabled)
ADXL356 in measurement mode: 150 μA
ADXL357 in measurement mode: 200 μA
ADXL356/ADXL357 in standby mode: 21 μA
ADXL356 has user adjustable analog output bandwidth
ADXL357 digital output features
Digital SPI and limited I2C interfaces supported
20-bit ADC
Data interpolation routine for synchronous sampling
Programmable high- and low-pass digital filters
Integrated temperature sensor
Voltage range options
VSUPPLY with internal regulators: 2.25 V to 3.6 V
V1P8ANA, V1P8DIG with internal LDO regulator bypassed: 1.8 V
typical ± 10%
Operating temperature range: −40°C to +125°C
14-terminal, 6 mm × 5.6 mm × 2.2 mm, LCC package
Figure 2. ADXL357
Inertial measurement units (IMUs)/attitude and heading
reference systems (AHRSs)
Platform stabilization systems
Structural health monitoring
Seismic imaging
Tilt sensing
Robotics
Condition monitoring
GENERAL DESCRIPTION
The analog output ADXL356 and the digital output ADXL357
are low noise density, low 0 g offset drift, low power, 3-axis
accelerometers with selectable measurement ranges. The
ADXL356B supports the ±10 g and ±20 g ranges, the ADXL356C
supports the ±10 g and ±40 g ranges, and the ADXL357 supports
the ±10 g, ±20 g, and ±40 g ranges.
The ADXL356/ADXL357 offer industry leading noise, minimal
offset drift over temperature, and long-term stability, enabling
precision applications with minimal calibration.
1
The low drift, low noise, and low power ADXL357 enables
accurate tilt measurement in an environment with high
vibration. The low noise of the ADXL356 over higher
frequencies is ideal for condition-based monitoring and other
vibration sensing applications.
The ADXL357 multifunction pin names may be referenced only
by their relevant function for either the serial peripheral
interface (SPI) or limited I2C interface.
Protected by U.S. Patents 8,472,270; 9,041,462; 8,665,627; 8,917,099; 6,892,576; 9,297,825; and 7,956,621.
Rev. A
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ADXL356/ADXL357
Data Sheet
TABLE OF CONTENTS
Features .............................................................................................. 1
DRDY Pin .................................................................................... 29
Applications ....................................................................................... 1
FIFO_FULL................................................................................. 29
Functional Block Diagrams ............................................................. 1
FIFO_OVR .................................................................................. 29
General Description ......................................................................... 1
Activity ......................................................................................... 29
Revision History ............................................................................... 3
External Synchronization and Interpolation .......................... 29
Specifications..................................................................................... 4
ADXL357 Register Map ................................................................. 32
Analog Output for the ADXL356 ............................................... 4
Register Definitions........................................................................ 33
Digital Output for the ADXL357 ............................................... 5
Analog Devices ID Register ...................................................... 33
SPI Digital Interface Characteristics for the ADXL357 .......... 7
Analog Devices MEMS ID Register......................................... 33
2
I C Digital Interface Characteristics for the ADXL357 ........... 8
Device ID Register ..................................................................... 33
Absolute Maximum Ratings............................................................ 9
Product Revision ID Register ................................................... 33
Thermal Resistance ...................................................................... 9
Status Register ............................................................................. 33
Recommended Soldering Profile ............................................... 9
FIFO Entries Register ................................................................ 34
ESD Caution .................................................................................. 9
Temperature Data Registers ...................................................... 34
Pin Configurations and Function Descriptions ......................... 10
X-Axis Data Registers ................................................................ 34
Typical Performance Characteristics ........................................... 12
Y-Axis Data Registers ................................................................ 35
Root Allan Variance (RAV) ADXL357 Characteristics ......... 20
Z-Axis Data Registers ................................................................ 35
Theory of Operation ...................................................................... 21
FIFO Access Register ................................................................. 36
Applications Information .............................................................. 22
X-Axis Offset Trim Registers .................................................... 36
Analog Output ............................................................................ 22
Y-Axis Offset Trim Registers .................................................... 36
Digital Output ............................................................................. 22
Z-Axis Offset Trim Registers .................................................... 37
Axes of Acceleration Sensitivity ............................................... 23
Activity Enable Register ............................................................ 37
Power Sequencing ...................................................................... 23
Activity Threshold Registers ..................................................... 37
Power Supply Description ......................................................... 23
Activity Count Register ............................................................. 37
Overrange Protection................................................................. 23
Filter Settings Register ............................................................... 38
Self Test ........................................................................................ 23
FIFO Samples Register .............................................................. 38
Filter ............................................................................................. 24
Interrupt Pin (INTx) Function Map Register......................... 38
Serial Communications ................................................................. 26
Data Synchronization ................................................................ 39
SPI Protocol ................................................................................. 26
I2C Speed, Interrupt Polarity, and Range Register ................. 39
SPI Bus Sharing ........................................................................... 26
Power Control Register ............................................................. 39
I2C Protocol ................................................................................. 27
Self Test Register ......................................................................... 40
Reading Acceleration or Temperature Data from the Interface
....................................................................................................... 27
Reset Register .............................................................................. 40
PCB Footprint Pattern ................................................................... 41
FIFO ................................................................................................. 28
Outline Dimensions ....................................................................... 42
Interrupts ......................................................................................... 29
Ordering Guide .......................................................................... 42
DATA_RDY................................................................................. 29
Rev. A | Page 2 of 42
Data Sheet
ADXL356/ADXL357
REVISION HISTORY
6/2020—Rev. 0 to Rev. A
Changes to Features Section, Applications Section, and General
Description Section ........................................................................... 1
Changes to Table 1 ............................................................................ 4
Changes to Table 2 ............................................................................ 5
Changes to Input Current Parameter, Table 3 ............................... 7
Changes to Acceleration (Any Axis, 0.1 ms) Parameter, Table 5;
Thermal Resistance Section; and Table 6 ....................................... 9
Moved Recommended Soldering Profile Section, Figure 5, and
Table 7 ................................................................................................. 9
Changes to Table 8 ..........................................................................10
Changes to Typical Performance Section and Figure 8 to
Figure 13 ...........................................................................................12
Changes to Figure 14 to Figure 19 ................................................13
Changes to Figure 23 to Figure 25 ................................................14
Changes to Figure 32 to Figure 37 ................................................16
Changes to Figure 44 Caption, Figure 47 Caption, and Figure 48
Caption .............................................................................................18
Changes to Figure 50 Caption, Figure 52 Caption, and
Figure 53 ...........................................................................................19
Changes to Theory of Operation Section ....................................21
Changes to Power Sequencing Section, V1P8ANA Section, and
Overrange Protection Section .......................................................23
Changes to Self Test Section, Filter Section, Figure 62, and
Figure 63 ...........................................................................................24
Changes to Table 11 ........................................................................25
Changes to Serial Communications Section and Figure 64 ......26
Added SPI Bus Sharing Section and Figure 65; Renumbered
Sequentially ......................................................................................26
Changes to I2C Protocol Section ...................................................27
Changes to FIFO Section ...............................................................28
Changes to DRDY Pin Section, FIFO_OVR Section, Activity
Section, NVM_BUSY Section, and External Synchronization
and Interpolation Section .............................................................. 29
Changed EXT_SYNC = 00—No External Sync or Interpolation
Section to EXT_SYNC = 00, EXT_CLK = 0—No External
Synchronization or Interpolation Section; EXT_SYNC = 10—
External Sync with Interpolation Section to EXT_SYNC = 10,
EXT_CLK = 0—External Synchronization with Interpolation
Section; and EXT_SYNC = 01—External Sync and External
Clock, No Interpolation Filter Section to EXT_SYNC = 01,
EXT_CLK = 1—External Synchronization and External Clock,
No Interpolation Filter Section ..................................................... 30
Changes to EXT_SYNC = 00, EXT_CLK = 0—No External
Synchronization or Interpolation Section, EXT_SYNC = 10,
EXT_CLK = 0—External Synchronization with Interpolation
Section, Table 13, and EXT_SYNC = 01, EXT_CLK = 1—
External Synchronization and External Clock, No Interpolation
Filter Section .................................................................................... 30
Added EXT_SYNC = 10, EXT_CLK = 1—External
Synchronization and External Clock, with Interpolation Filter
Section .............................................................................................. 30
Changes to Table 14 ........................................................................ 31
Changes to Figure 74, Figure 75 Caption, and Figure 76 .......... 31
Changes to Temperature Data Registers Section, Table 23,
Table 24, and Table 25..................................................................... 34
Changes to Table 27, Table 28, Table 30 and Table 31 ................ 35
Change to Table 42 Title ................................................................. 37
Changes to Table 44 ........................................................................ 38
Changes to Reset Register Section ................................................ 40
Changes to Figure 77 ...................................................................... 41
Changes to Ordering Guide ........................................................... 42
2/2017—Revision 0: Initial Version
Rev. A | Page 3 of 42
ADXL356/ADXL357
Data Sheet
SPECIFICATIONS
ANALOG OUTPUT FOR THE ADXL356
TA = 25°C, VSUPPLY = 3.3 V, x-axis acceleration and y-axis acceleration = 0 g, z-axis acceleration = 1 g, and full-scale range = ±10 g, unless
otherwise noted.
Table 1.
Parameter
SENSOR INPUT
Output Full-Scale Range (FSR)
Resonant Frequency1
Nonlinearity
Cross Axis Sensitivity
SENSITIVITY
Sensitivity at XOUT, YOUT, ZOUT
Sensitivity Change Due to Temperature
Repeatability2
0 g OFFSET
0 g Output for XOUT, YOUT, ZOUT
0 g Offset vs. Temperature (X-Axis, Y-Axis,
and Z-Axis)3
Repeatability2
Vibration Rectification Error (VRE)4
NOISE
Spectral Density5
X-Axis, Y-Axis, and Z-Axis
Velocity Random Walk
X-Axis and Y-Axis
Z-Axis
BANDWIDTH
SELF TEST
Output Change
Z-Axis
POWER SUPPLY
Voltage Range
VSUPPLY8
VDDIO
V1P8ANA, V1P8DIG
Current
Measurement Mode
VSUPPLY
V1P8ANA
V1P8DIG
Test Conditions/Comments
Each axis
ADXL356B supports two ranges
ADXL356C supports two ranges
Min
Max
Unit
g
g
kHz
% FSR
% FSR
%
±10, ±20
±10, ±40
5.5
0.1
1.3
1
±10 g
±40 g
Ratiometric to V1P8ANA
±10 g
±20 g
±40 g
TA = −40°C to +125°C
X-axis and y-axis
Z-axis
Each axis, ±10 g
Referred to V1P8ANA/2
TA = −40°C to +125°C
Typ
73.6
36.8
18.4
80
40
20
±0.01
0.1
0.2
86.4
43.2
21.6
mV/g
mV/g
mV/g
%/°C
%
%
−375
−0.75
±125
±0.2
+375
+0.75
mg
mg/°C
X-axis and y-axis
Z-axis
Offset due to 7.5 g rms vibration, ±10 g
range, in a 1 g orientation
±4.25
±5