ADXL355BEZ

Low Noise, Low Drift, Low Power, 3-Axis MEMS Accelerometers ADXL354/ADXL355 Data Sheet FEATURES FUNCTIONAL BLOCK DIAGRAMS V1P8ANA LDO VSUPPLY V1P8DIG RANGE POWER MANAGEMENT LDO XOUT ANALOG FILTER ST1 3-AXIS SENSOR OUT TEMP SENSOR TEMP CONTROL LOGIC ADXL354 VSSIO ST2 STBY VDDIO 14205-002 YOUT VSS Figure 1. ADXL354 Functional Block Diagram V1P8ANA LDO VSUPPLY V1P8DIG LDO VDDIO ADXL355 POWER MANAGEMENT ADC 3-AXIS SENSOR ANALOG FILTER ADC DIGITAL FILTER CONTROL LOGIC ADC TEMP SENSOR ADC FIFO VSSIO VSS SERIAL I/O INT1 INT2 DRDY CS/SCL SCLK/VSSIO MOSI/SDA MISO/ASEL 14205-001 Hermetic package offers excellent long-term stability 0 g offset vs. temperature (all axes): 0.15 mg/°C maximum Ultralow noise density (all axes): 20 μg/√Hz (ADXL354) Low power, VSUPPLY (LDO enabled) ADXL354 in measurement mode: 150 μA ADXL355 in measurement mode: 200 μA ADXL354/ADXL355 in standby mode: 21 μA ADXL354 has user adjustable analog output bandwidth ADXL355 digital output features Digital serial peripheral interface (SPI)/I2C interfaces 20-bit analog-to-digital converter (ADC) Data interpolation routine for synchronous sampling Programmable high- and low-pass digital filters Electromechanical self test Integrated temperature sensor Voltage range options VSUPPLY with internal regulators: 2.25 V to 3.6 V V1P8ANA, V1P8DIG with internal low dropout regulator (LDO) bypassed: 1.8 V typical ± 10% Operating temperature range: −40°C to +125°C 14-terminal, 6 mm × 6 mm × 2.1 mm, LCC package, 0.26 grams Figure 2. ADXL355 Functional Block Diagram APPLICATIONS Inertial measurement units (IMUs)/altitude and heading reference systems (AHRSs) Platform stabilization systems Structural health monitoring Seismic imaging Tilt sensing Robotics Condition monitoring GENERAL DESCRIPTION The analog output ADXL354 and the digital output ADXL355 are low noise density, low 0 g offset drift, low power, 3-axis accelerometers with selectable measurement ranges. The ADXL354B supports the ±2 g and ±4 g ranges, the ADXL354C supports the ±2 g and ±8 g ranges, and the ADXL355 supports the ±2.048 g, ±4.096 g, and ±8.192 g ranges. The ADXL354/ ADXL355 offer industry leading noise, minimal offset drift over temperature, and long term stability enabling precision applications with minimal calibration. 1 Highly integrated in a compact form factor, the low power ADXL355 is ideal in an Internet of Things (IoT) sensor node and other wireless product designs. The ADXL355 multifunction pin names may be referenced by their relevant function only for either the SPI or I2C interfaces. 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 ©2016–2018 Analog Devices, Inc. All rights reserved. www.analog.com Technical Support ADXL354/ADXL355 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1  NVM_BUSY ............................................................................... 28  Applications ....................................................................................... 1  External Synchronization and Interpolation .......................... 29  Functional Block Diagrams ............................................................. 1  ADXL355 Register Map ................................................................. 31  General Description ......................................................................... 1  Register Definitions........................................................................ 32  Revision History ............................................................................... 2  Analog Devices ID Register ...................................................... 32  Specifications..................................................................................... 3  Analog Devices MEMS ID Register......................................... 32  Analog Output for the ADXL354 ............................................... 3  Device ID Register ..................................................................... 32  Digital Output for the ADXL355 ............................................... 4  Product Revision ID Register ................................................... 32  SPI Digital Interface Characteristics for the ADXL355 .......... 5  Status Register ............................................................................. 32  I C Digital Interface Characteristics for the ADXL355 ........... 6  FIFO Entries Register ................................................................ 33  Absolute Maximum Ratings............................................................ 8  Temperature Data Registers ...................................................... 33  Thermal Resistance ...................................................................... 8  X-Axis Data Registers ................................................................ 33  ESD Caution .................................................................................. 8  Y-Axis Data Registers ................................................................ 34  Pin Configurations and Function Descriptions ........................... 9  Z-Axis Data Registers ................................................................ 34  Typical Performance Characteristics ........................................... 11  FIFO Access Register ................................................................. 35  Root Allan Variance (RAV) ADXL355 Characteristics ......... 19  X-Axis Offset Trim Registers .................................................... 35  Theory of Operation ...................................................................... 20  Y-Axis Offset Trim Registers .................................................... 35  Analog Output ............................................................................ 20  Z-Axis Offset Trim Registers .................................................... 36  Digital Output ............................................................................. 21  Activity Enable Register ............................................................ 36  Axes of Acceleration Sensitivity ............................................... 21  Activity Threshold Registers ..................................................... 36  Power Sequencing ...................................................................... 22  Activity Count Register ............................................................. 36  Power Supply Description ......................................................... 22  Filter Settings Register ............................................................... 37  Overrange Protection................................................................. 22  FIFO Samples Register .............................................................. 37  Self Test ........................................................................................ 22  Interrupt Pin (INTx) Function Map Register......................... 37  Filter ............................................................................................. 23  Data Synchronization ................................................................ 38  Serial Communications ................................................................. 25  I2C Speed, Interrupt Polarity, and Range Register ................. 38  SPI Protocol ................................................................................. 25  Power Control Register ............................................................. 38  I2C Protocol ................................................................................. 26  Self Test Register ......................................................................... 39  Reading Acceleration or Temperature Data from the Interface ....................................................................................................... 26  Reset Register .............................................................................. 39  Recommended Soldering Profile ................................................. 40  FIFO ................................................................................................. 27  PCB Footprint Pattern ............................................................... 41  Interrupts ......................................................................................... 28  Packaging and Ordering Information ......................................... 42  DATA_RDY................................................................................. 28  Outline Dimensions ................................................................... 42  DRDY Pin .................................................................................... 28  Branding Information................................................................ 42  FIFO_FULL ................................................................................. 28  Ordering Guide .......................................................................... 42  2 FIFO_OVR .................................................................................. 28  Activity ......................................................................................... 28  REVISION HISTORY 4/2018—Rev. 0 to Rev. Added Vibration Parameter, Table 5 .............................................. 8 Changes to Overrange Protection Section .................................. 22 8/2016—Revision 0: Initial Version Rev. A | Page 2 of 42 Data Sheet ADXL354/ADXL355 SPECIFICATIONS ANALOG OUTPUT FOR THE ADXL354 TA = 25°C, VSUPPLY = 3.3 V, x-axis acceleration and y-axis acceleration = 0 g, and z-axis acceleration = 1 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 0 g OFFSET 0 g Output for XOUT, YOUT, ZOUT 0 g Offset vs. Temperature (X-Axis, Y-Axis, and Z-Axis)2 Repeatability3 Vibration Rectification Error (VRE)4 NOISE DENSITY X-Axis, Y-Axis, and Z-Axis Velocity Random Walk BANDWIDTH Internal Low-Pass Filter Frequency SELF TEST Output Change X-Axis Y-Axis Z-Axis POWER SUPPLY Voltage Range VSUPPLY5 VDDIO V1P8ANA, V1P8DIG with Internal Low Dropout Regulator (LDO) Bypassed Current Measurement Mode VSUPPLY (LDO Enabled) V1P8ANA (LDO Disabled) V1P8DIG (LDO Disabled) Standby Mode VSUPPLY (LDO Enabled) V1P8ANA (LDO Disabled) V1P8DIG (LDO Disabled) Turn On Time6 Test Conditions/Comments Each axis ADXL354B, supports two ranges ADXL354C, supports two ranges Min Rev. A | Page 3 of 42 g g kHz % % 400 200 100 ±0.01 432 216 108 mV/g mV/g mV/g %/°C −75 −0.15 ±25 ±0.1 ±3.5 ±9