Digital Triaxial Vibration Sensor with FFT Analysis and Storage Digital Data Sheet ADIS16228 FEATURES GENERAL DESCRIPTION Frequency domain triaxial vibration sensor The ADIS16228 iSensor is a complete vibration sensing system Flat frequency response up to 5 kHz that combines triaxial acceleration sensing with advanced time Digital acceleration data, 18 g measurement range domain and frequency domain signal processing. Time domain Digital range settings: 0 g to 1 g/5 g/10 g/20 g signal processing includes a programmable decimation filter Real-time sample mode: 20.48 kSPS, single-axis and selectable windowing function. Frequency domain processing Capture sample modes: 20.48 kSPS, three axes includes a 512-point, real-valued FFT for each axis, along with Trigger modes: SPI, timer, external FFT averaging, which reduces the noise floor variation for finer Programmable decimation filter, 11 rate settings resolution. The 14-record FFT storage system offers users the Multirecord capture for selected filter settings ability to track changes over time and capture FFTs with multiple Manual capture mode for time domain data collection decimation filter settings. FFT, 512-point, real valued, all three axes (x, y, z) The 20.48 kSPS sample rate and 5 kHz flat frequency band 3 windowing options: rectangular, Hanning, flat top provide a frequency response that is suitable for many machine Programmable FFT averaging: up to 255 averages health applications. The aluminum core provides excellent Storage: 14 FFT records on all three axes (x, y, z) mechanical coupling to the MEMS acceleration sensors. An Programmable alarms, 6 spectral bands internal clock drives the data sampling and signal processing 2-level settings for warning and fault definition system during all operations, which eliminates the need for an Adjustable response delay to reduce false alarms external clock source. The data capture function has three modes Internal self-test with status flags that offer several options to meet the needs of many different Digital temperature and power supply measurements applications. In addition, real-time mode provides direct access 2 auxiliary digital inputs/outputs to streaming data on one axis. The SPI and data buffer structure SPI-compatible serial interface provide convenient access to data output. The ADIS16228 also Identification registers: serial number, device ID, user ID offers a digital temperature sensor and digital power supply Single-supply operation: 3.0 V to 3.6 V measurements. Operating temperature range: 40C to +125C The ADIS16228 is available in a 15 mm 24 mm 15 mm module 15 mm 24 mm 15 mm aluminum package, flex connector with flanges, machine screw holes (M2 or 2-56), and a flexible APPLICATIONS connector that enables simple user interface and installation. It Vibration analysis has an extended operating temperature range of 40C to +125C. Condition monitoring Machine health Instrumentation, diagnostics Safety shutoff sensing FUNCTIONAL BLOCK DIAGRAM DIO1 DIO2 RST VDD INPUT/ POWER ALARMS GND ADIS16228 OUTPUT MANAGEMENT CS TRIAXIAL CONTROL CONTROLLER MEMS REGISTERS SENSOR SCLK SPI PORT DIN TEMP SENSOR FILTER OUTPUT CAPTURE RECORD ADC DOUT WINDOW REGISTERS BUFFER STORAGE FFT SUPPLY Figure 1. Rev. F 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 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 20112018 Analog Devices, Inc. All rights reserved. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Technical Support www.analog.com Trademarks and registered trademarks are the property of their respective owners. 10069-001ADIS16228 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Alarm Definition ........................................................................ 18 Applications ....................................................................................... 1 Alarm Indicator Signals ............................................................. 19 General Description ......................................................................... 1 Alarm Flags and Conditions ..................................................... 19 Functional Block Diagram .............................................................. 1 Alarm Status ................................................................................ 20 Revision History ............................................................................... 3 Worst-Case Condition Monitoring.......................................... 20 Specifications ..................................................................................... 4 Reading Output Data ..................................................................... 21 Timing Specifications .................................................................. 5 Reading Data from the Data Buffer ......................................... 21 Absolute Maximum Ratings ............................................................ 6 Accessing FFT Record Data ...................................................... 21 ESD Caution .................................................................................. 6 Data Format ................................................................................ 22 Pin Configuration and Function Descriptions ............................. 7 Real-Time Data Collection ....................................................... 22 Theory of Operation ........................................................................ 8 Power Supply/Temperature ....................................................... 22 Sensing Element ........................................................................... 8 FFT Event Header ...................................................................... 23 Signal Processing .......................................................................... 8 System Tools .................................................................................... 24 User Interface ................................................................................ 8 Global Commands ..................................................................... 24 Basic Operation ................................................................................. 9 Status/Error Flags ....................................................................... 24 SPI Write Commands .................................................................. 9 Power-Down ............................................................................... 24 SPI Read Commands ................................................................... 9 Operation Managment .............................................................. 25 Data Recording and Signal Processing ........................................ 12 Input/Output Functions ............................................................ 25 Recording Mode ......................................................................... 12 Self-Test ....................................................................................... 26 Spectral Record Production ...................................................... 13 Flash Memory Management ..................................................... 26 Sample Rate/Filtering ................................................................. 13 Device Identification .................................................................. 26 Dynamic Range/Sensitivity ....................................................... 15 Applications Information .............................................................. 27 Pre-FFT Windowing .................................................................. 16 Mating Connector ...................................................................... 27 FFT ............................................................................................... 17 Breakout Board ........................................................................... 27 Recording Times ......................................................................... 17 PC-Based Evaluation Tools ....................................................... 27 Data Records ............................................................................... 17 Outline Dimensions ....................................................................... 29 FFT Record Flash Endurance ................................................... 17 Ordering Guide .......................................................................... 29 Spectral Alarms ............................................................................... 18 Rev. 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