ADCMXL3021 datasheet(2/50 Pages) AD

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ADcmXL3021

Data Sheet

Rev. A | Page 2 of 50

TABLE OF CONTENTS

Features .............................................................................................. 1

Applications....................................................................................... 1

Functional Block Diagram .............................................................. 1

General Description ......................................................................... 1

Revision History ............................................................................... 3

Specifications..................................................................................... 4

Timing Specifications .................................................................. 5

Absolute Maximum Ratings............................................................ 7

Thermal Resistance ...................................................................... 7

ESD Caution.................................................................................. 7

Pin Configuration and Function Descriptions............................. 8

Typical Performance Characteristics ............................................. 9

Theory of Operation ...................................................................... 14

Core Sensors................................................................................ 14

Signal Processsing ...................................................................... 14

Modes of Operation ................................................................... 15

Data Recording Options............................................................ 16

User Interface .............................................................................. 19

Basic Operation............................................................................... 22

Device Configuration ................................................................ 22

Dual Memory Structure ............................................................ 22

Power-Up Sequence ................................................................... 22

Trigger.......................................................................................... 22

Sample Rate ................................................................................. 23

Datapath Processing................................................................... 23

Spectral Alarms........................................................................... 25

Mechanical Mounting Recommendations.............................. 25

User Register Memory Map .......................................................... 26

User Register Details ...................................................................... 32

PAGE_ID (Page Number) ......................................................... 32

TEMP_OUT (Internal Temperature) ...................................... 32

SUPPLY_OUT (Power Supply Voltage) .................................. 32

FFT_AVG1, Spectral Averaging ............................................... 32

FFT_AVG2, Spectral Averaging ............................................... 33

BUF_PNTR, Buffer Pointer ...................................................... 33

REC_PNTR, Record Pointer..................................................... 34

X_BUF, Buffer Access Register, X-Axis ................................... 34

Y_BUF, Buffer Access Register, Y-Axis ................................... 35

Z_BUF/RSS_BUF, Buffer Access Register, Z-Axis..................... 35

X_ANULL, X-AXIS Bias Calibration Register....................... 36

Y_ANULL, Y-AXIS Bias Calibration Register....................... 36

Z_ANULL, Z-AXIS Bias Calibration Register ....................... 36

REC_CTRL, Recording Control .............................................. 36

RT_CTRL, Real TIme Streaming Control .............................. 38

REC_PRD, Record Period......................................................... 38

ALM_F_LOW, Alarm Frequency Band .................................. 38

ALM_F_HIGH, Alarm Frequency Band ................................ 38

ALM_X_MAG1, Alarm Level 1 X-Axis.................................. 39

ALM_Y_MAG1, Alarm Level 1 Y-Axis .................................. 39

ALM_Z_MAG1, Alarm Level 1 Z-Axis .................................. 39

ALM_X_MAG2, Alarm Level 2 X-Axis.................................. 39

ALM_Y_MAG2, Alarm Level 2 Y-Axis .................................. 40

ALM_Z_MAG2, Alarm Level 2 Z-Axis .................................. 40

ALM_PNTR, Alarm Pointer..................................................... 40

ALM_S_MAG Alarm Level ...................................................... 40

ALM_CTRL, Alarm Conrol ..................................................... 40

FILT_CTRL, Filter Control....................................................... 41

AVG_CNT, Decimation Control.............................................. 41

DIAG_STAT, Status, and Error Flags....................................... 42

GLOB_CMD, Global Commands............................................ 42

ALM_X_STAT, Alarm Status X-Axis ...................................... 42

ALM_Y_STAT, Alarm Status Y-Axis....................................... 43

ALM_Z_STAT, Alarm Status Z-axis........................................ 43

ALM_X_PEAK, Alarm Peak Level X-Axis............................. 43

ALM_Y_PEAK, Alarm Peak LeveL Y-AXIS .......................... 43

ALM_Z_PEAK, Alarm Peak Level Z-AXIS............................ 43

TIME_STAMP_L and TIME_STAMP_H, Data Record

Timestamp................................................................................... 44

DAY_REV, Day and Revision ................................................... 44

YEAR_MON, Year and Month................................................. 44

PROD_ID, Product Identification ........................................... 44

SERIAL_NUM, Serial Number ................................................ 44

USER_SCRATCH ...................................................................... 44

REC_FLASH_CNT, Record Flash Endurance ....................... 44

MISC_CTRL, Miscellaneous Control ..................................... 45

REC_INFO1, Record Information........................................... 45

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