ADXL356CEZ

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 Document Feedback 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: 781.329.4700 ©2017–2020 Analog Devices, Inc. All rights reserved. Technical Support www.analog.com 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