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Low Noise, Low Drift, Low Power,3-Axis MEMS AccelerometersADXL356/ADXL357Data SheetFEATURESFUNCTIONAL BLOCK 1YOUTZVSSFigure 1. /SDAMISO/ASEL15429-002Hermetic package offers optimal long-term stability0 g offset vs. temperature (all axes): 0.75 mg/ C maximumUltralow noise spectral density (all axes): 75 μg/ HzLow power, VSUPPLY (LDO regulator enabled)ADXL356 in measurement mode: 150 μAADXL357 in measurement mode: 200 μAADXL356/ADXL357 in standby mode: 21 μAADXL356 has user adjustable analog output bandwidthADXL357 digital output featuresDigital SPI and limited I2C interfaces supported20-bit ADCData interpolation routine for synchronous samplingProgrammable high- and low-pass digital filtersIntegrated temperature sensorVoltage range optionsVSUPPLY with internal regulators: 2.25 V to 3.6 VV1P8ANA, V1P8DIG with internal LDO regulator bypassed: 1.8 Vtypical 10%Operating temperature range: 40 C to 125 C14-terminal, 6 mm 5.6 mm 2.2 mm, LCC packageFigure 2. ADXL357Inertial measurement units (IMUs)/attitude and headingreference systems (AHRSs)Platform stabilization systemsStructural health monitoringSeismic imagingTilt sensingRoboticsCondition monitoringGENERAL DESCRIPTIONThe analog output ADXL356 and the digital output ADXL357are low noise density, low 0 g offset drift, low power, 3-axisaccelerometers with selectable measurement ranges. TheADXL356B supports the 10 g and 20 g ranges, the ADXL356Csupports the 10 g and 40 g ranges, and the ADXL357 supportsthe 10 g, 20 g, and 40 g ranges.The ADXL356/ADXL357 offer industry leading noise, minimaloffset drift over temperature, and long-term stability, enablingprecision applications with minimal calibration.1The low drift, low noise, and low power ADXL357 enablesaccurate tilt measurement in an environment with highvibration. The low noise of the ADXL356 over higherfrequencies is ideal for condition-based monitoring and othervibration sensing applications.The ADXL357 multifunction pin names may be referenced onlyby their relevant function for either the serial peripheralinterface (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. ADocument FeedbackInformation furnished by Analog Devices is believed to be accurate and reliable. However, noresponsibility is assumed by Analog Devices for its use, nor for any infringements of patents or otherrights of third parties that may result from its use. Specifications subject to change without notice. Nolicense 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: 781.329.4700 2017–2020 Analog Devices, Inc. All rights reserved.Technical Supportwww.analog.com

ADXL356/ADXL357Data SheetTABLE OF CONTENTSFeatures . 1DRDY Pin . 29Applications . 1FIFO FULL. 29Functional Block Diagrams . 1FIFO OVR . 29General Description . 1Activity . 29Revision History . 3External Synchronization and Interpolation . 29Specifications. 4ADXL357 Register Map . 32Analog Output for the ADXL356 . 4Register Definitions. 33Digital Output for the ADXL357 . 5Analog Devices ID Register . 33SPI Digital Interface Characteristics for the ADXL357 . 7Analog Devices MEMS ID Register. 332I C Digital Interface Characteristics for the ADXL357 . 8Device ID Register . 33Absolute Maximum Ratings. 9Product Revision ID Register . 33Thermal Resistance . 9Status Register . 33Recommended Soldering Profile . 9FIFO Entries Register . 34ESD Caution . 9Temperature Data Registers . 34Pin Configurations and Function Descriptions . 10X-Axis Data Registers . 34Typical Performance Characteristics . 12Y-Axis Data Registers . 35Root Allan Variance (RAV) ADXL357 Characteristics . 20Z-Axis Data Registers . 35Theory of Operation . 21FIFO Access Register . 36Applications Information . 22X-Axis Offset Trim Registers . 36Analog Output . 22Y-Axis Offset Trim Registers . 36Digital Output . 22Z-Axis Offset Trim Registers . 37Axes of Acceleration Sensitivity . 23Activity Enable Register . 37Power Sequencing . 23Activity Threshold Registers . 37Power Supply Description . 23Activity Count Register . 37Overrange Protection. 23Filter Settings Register . 38Self Test . 23FIFO Samples Register . 38Filter . 24Interrupt Pin (INTx) Function Map Register. 38Serial Communications . 26Data Synchronization . 39SPI Protocol . 26I2C Speed, Interrupt Polarity, and Range Register . 39SPI Bus Sharing . 26Power Control Register . 39I2C Protocol . 27Self Test Register . 40Reading Acceleration or Temperature Data from the Interface. 27Reset Register . 40PCB Footprint Pattern . 41FIFO . 28Outline Dimensions . 42Interrupts . 29Ordering Guide . 42DATA RDY. 29Rev. A Page 2 of 42

Data SheetADXL356/ADXL357REVISION HISTORY6/2020—Rev. 0 to Rev. AChanges to Features Section, Applications Section, and GeneralDescription Section . 1Changes to Table 1 . 4Changes to Table 2 . 5Changes to Input Current Parameter, Table 3 . 7Changes to Acceleration (Any Axis, 0.1 ms) Parameter, Table 5;Thermal Resistance Section; and Table 6 . 9Moved Recommended Soldering Profile Section, Figure 5, andTable 7 . 9Changes to Table 8 .10Changes to Typical Performance Section and Figure 8 toFigure 13 .12Changes to Figure 14 to Figure 19 .13Changes to Figure 23 to Figure 25 .14Changes to Figure 32 to Figure 37 .16Changes to Figure 44 Caption, Figure 47 Caption, and Figure 48Caption .18Changes to Figure 50 Caption, Figure 52 Caption, andFigure 53 .19Changes to Theory of Operation Section .21Changes to Power Sequencing Section, V1P8ANA Section, andOverrange Protection Section .23Changes to Self Test Section, Filter Section, Figure 62, andFigure 63 .24Changes to Table 11 .25Changes to Serial Communications Section and Figure 64 .26Added SPI Bus Sharing Section and Figure 65; RenumberedSequentially .26Changes to I2C Protocol Section .27Changes to FIFO Section .28Changes to DRDY Pin Section, FIFO OVR Section, ActivitySection, NVM BUSY Section, and External Synchronizationand Interpolation Section . 29Changed EXT SYNC 00—No External Sync or InterpolationSection to EXT SYNC 00, EXT CLK 0—No ExternalSynchronization or Interpolation Section; EXT SYNC 10—External Sync with Interpolation Section to EXT SYNC 10,EXT CLK 0—External Synchronization with InterpolationSection; and EXT SYNC 01—External Sync and ExternalClock, No Interpolation Filter Section to EXT SYNC 01,EXT CLK 1—External Synchronization and External Clock,No Interpolation Filter Section . 30Changes to EXT SYNC 00, EXT CLK 0—No ExternalSynchronization or Interpolation Section, EXT SYNC 10,EXT CLK 0—External Synchronization with InterpolationSection, Table 13, and EXT SYNC 01, EXT CLK 1—External Synchronization and External Clock, No InterpolationFilter Section . 30Added EXT SYNC 10, EXT CLK 1—ExternalSynchronization and External Clock, with Interpolation FilterSection . 30Changes to Table 14 . 31Changes to Figure 74, Figure 75 Caption, and Figure 76 . 31Changes to Temperature Data Registers Section, Table 23,Table 24, and Table 25. 34Changes to Table 27, Table 28, Table 30 and Table 31 . 35Change to Table 42 Title . 37Changes to Table 44 . 38Changes to Reset Register Section . 40Changes to Figure 77 . 41Changes to Ordering Guide . 422/2017—Revision 0: Initial VersionRev. A Page 3 of 42

ADXL356/ADXL357Data SheetSPECIFICATIONSANALOG OUTPUT FOR THE ADXL356TA 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, unlessotherwise noted.Table 1.ParameterSENSOR INPUTOutput Full-Scale Range (FSR)Resonant Frequency1NonlinearityCross Axis SensitivitySENSITIVITYSensitivity at XOUT, YOUT, ZOUTSensitivity Change Due to TemperatureRepeatability20 g OFFSET0 g Output for XOUT, YOUT, ZOUT0 g Offset vs. Temperature (X-Axis, Y-Axis,and Z-Axis)3Repeatability2Vibration Rectification Error (VRE)4NOISESpectral Density5X-Axis, Y-Axis, and Z-AxisVelocity Random WalkX-Axis and Y-AxisZ-AxisBANDWIDTHSELF TESTOutput ChangeZ-AxisPOWER SUPPLYVoltage RangeVSUPPLY8VDDIOV1P8ANA, V1P8DIGCurrentMeasurement ModeVSUPPLYV1P8ANAV1P8DIGTest Conditions/CommentsEach axisADXL356B supports two rangesADXL356C supports two rangesMinMaxUnitggkHz% FSR% FSR% 10, 20 10, 405.50.11.31 10 g 40 gRatiometric to V1P8ANA 10 g 20 g 40 gTA 40 C to 125 CX-axis and y-axisZ-axisEach axis, 10 gReferred to V1P8ANA/2TA 40 C to 125 CTyp73.636.818.4804020 0.010.10.286.443.221.6mV/gmV/gmV/g%/ C%% 375 0.75 125 0.2 375 0.75mgmg/ CX-axis and y-axisZ-axisOffset due to 7.5 g rms vibration, 10 grange, in a 1 g orientation 4.25 5 0.1mgmgg 10 g 40 g 10 g75110μg/ Hzμg/ Hz38.226.5mm/sec/ Hrmm/sec/ HrkHz 3 dB, overall transfer function6 10 g range7Internal low dropout (LDO) regulatorbypassed, VSUPPLY 0 VLDO regulator enabledLDO regulator disabledLDO regulator disabledRev. A Page 4 of VVV15013812μAμAμA

Data SheetParameterStandby ModeVSUPPLYV1P8ANAV1P8DIGTurn On Time9OUTPUT AMPLIFIERSwingOutput Series ResistanceTEMPERATURE SENSOROutput at 25 CScale FactorTEMPERATUREOperating Temperature RangeADXL356/ADXL357Test Conditions/CommentsLDO regulator enabledLDO regulator disabledLDO regulator disabled10 g rangePower-off to standbyXOUT, YOUT, ZOUT, and TEMP pinsNo loadMinTypMaxUnit21710 10 100.03μAμAμAmsms32V1P8ANA 0.03VkΩ9673.0mVmV/ C 40 125 C1The resonant frequency is a sensor characteristic.Repeatability is predicted for a 10 year life and includes shifts due to the high temperature operating life (HTOL) (TA 150 C, VSUPPLY 3.6 V, and 1000 hours),temperature cycling ( 55 C to 125 C and 1000 cycles), velocity random walk, broadband noise, and temperature hysteresis. Repeatability in relation to time followsthe square root law. For example, to obtain offset repeatability of the x-axis for 2.5 years, use the following equation: 4.25 mg (2.5 years/10 years) 2.125 mg.3The temperature change is 40 C to 25 C, or 25 C to 125 C.4The VRE measurement is the shift in dc offset while the device is subject to 7.5 g rms of random vibration from 50 Hz to 2 kHz. The device under test (DUT) isconfigured for the 10 g range and an output data rate of 4 kHz. The VRE scales with the range setting.5Based on characterization.6Overall transfer function includes the sensor mechanical response and all other filters on the signal chain.7 10 g indicates a test condition. The self test result converted to the acceleration value is independent of the selected range.8When V1P8ANA and V1P8DIG are generated internally, VSUPPLY is valid. To disable the LDO regulator and drive V1P8ANA and V1P8DIG externally, connect VSUPPLY to VSS.9Standby to measurement mode. This specification is valid when the output is within 5 mg of the final value.2DIGITAL OUTPUT FOR THE ADXL357TA 25 C, VSUPPLY 3.3 V, x-axis acceleration and y-axis acceleration 0 g, z-axis acceleration 1 g, full-scale range 10 g, and outputdata rate (ODR) 500 Hz, unless otherwise noted. Note that multifunction pin names may be referenced only by their relevant function.Table 2.ParameterSENSOR INPUTOutput Full Scale Range (FSR)NonlinearityCross Axis SensitivitySENSITIVITY1X-Axis, Y-Axis, and Z-Axis SensitivityX-Axis, Y-Axis, and Z-Axis Scale FactorSensitivity Change due to TemperatureRepeatability20 g OFFSETX-Axis, Y-Axis, and Z-Axis 0 g Output0 g Offset vs. Temperature (X-Axis, Y-Axis, andZ-Axis)3Test Conditions/CommentsEach axisUser selectable, supports three rangesMinTA 40 C to 125 CRev. A Page 5 of 42Max 10, 20, 400.11.31 10 g 40 gEach axis 10 g 20 g 40 g 10 g 20 g 40 gTA 40 C to 125 CX-axis and y-axisZ-axisEach axis, 10 gTypUnitg% FSR% FSR%47,10423,55211,77651,20025,60012,80019.53978 μg/LSBμg/LSB%/ C%% 375 0.75 125 0.20 375 0.75mgmg/ C