ADIS16227_15 Datasheet, PDF (1/24 Pages) Analog Devices – Digital Triaxial Vibration Sensor with FFT Analysis and Storage

Data Sheet
FEATURES
Frequency domain triaxial vibration sensor
Digital acceleration data, ± 70 g measurement range
Digital range settings: 1 g, 5 g, 20 g, 70 g
Sample rate: 100.2 kHz, 4 decimation filter settings
FFT, 512 point, real valued, all three axes (x, y, z)
Windowing options: rectangular, Hanning, flat top
Programmable FFT averaging, up to 256 averages
Storage, 16 FFT records on all three axes (x, y, z)
Programmable alarms, 6 spectral bands
2-level settings for warning and fault definition
Adjustable response delay to reduce false alarms
Trigger modes: SPI command, timer, external trigger
Multirecord capture for selected filter settings
Manual capture mode for time-domain data collection
Internal self-test with status flags
Digital temperature and power supply measurements
2 auxiliary digital I/Os
SPI-compatible serial interface
Serial number and device ID
Single-supply operation: 3.15 V to 3.6 V
Operating temperature range: −40°C to +125°C
15 mm × 15 mm × 15 mm aluminum package, flex connector
APPLICATIONS
Vibration analysis
Condition monitoring
Machine health
Instrumentation, diagnostics
Safety shutoff sensing
Digital Triaxial Vibration Sensor
with FFT Analysis and Storage
ADIS16227
GENERAL DESCRIPTION
The ADIS16227 iSensor® is a complete vibration sensing system
that combines wide bandwidth, triaxial acceleration sensing with
advanced time domain and frequency domain signal processing.
Time domain signal processing includes a programmable decimation
filter and selectable windowing function. Frequency domain
processing includes a 512 point, real-valued FFT for each axis,
along with FFT averaging, which reduces the noise floor variation
for finer resolution. The 16-record FFT storage system offers
users the ability to track changes over time and to capture FFTs
with multiple decimation filter settings.
The 22 kHz sensor resonance and 100.2 kSPS sample rate
provide a frequency response that is suitable for machine-health
applications. The aluminum core provides excellent mechanical
coupling to the MEMS acceleration sensors. An internal clock
drives the data sampling and signal processing system during all
operations, which eliminates the need for an external clock
source. The data capture function has three modes that offer
several options to meet the needs of many different applica-
tions.
The SPI and data buffer structure provide convenient access
to wide bandwidth sensor data. The ADIS16227 also offers a
digital temperature sensor and digital power supply measure-
ments.
The ADIS16227 is available in a 15 mm × 15 mm × 15 mm module
with a threaded hole for stud mounting with a 10-32 UNF screw.
The dual-row, 1 mm, 14-pin, flexible connector enables simple
user interface and installation. The ADIS16227 is footprint and
pin-for-pin compatible with the ADIS16223. It has an extended
operating temperature range of −40°C to +125°C.
ADIS16227
TRIAXIAL
MEMS
SENSOR
TEMP
SENSOR
SUPPLY
FUNCTIONAL BLOCK DIAGRAM
DIO1 DIO2 RST
VDD
INPUT/
OUTPUT
ALARMS
POWER
MANAGEMENT
ADC
CONTROLLER
CAPTURE
BUFFER
FILTER
WINDOW
FFT
RECORD
STORAGE
CONTROL
REGISTERS
OUTPUT
REGISTERS
SPI
PORT
GND
CS
SCLK
DIN
DOUT
Figure 1.
Rev. B
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