ADIS16220_09 Datasheet, PDF (1/20 Pages) Analog Devices – Programmable Digital Vibration Sensor

Programmable
Digital Vibration Sensor
ADIS16220
FEATURES
Digital ±70 g accelerometer/vibration sensing
22 kHz sensor resonance
100.2 kSPS sample rate
SPI-compatible serial interface
Programmable data capture function:
3 channels, 1024 samples each
1 accelerometer/2 auxiliary ADCs (AIN1, AIN2)
Manual trigger for user initiation
Automatic trigger for periodic data capture
Event trigger for condition-driven capture
Digital temperature sensor output
Digitally controlled sample rate
Digitally controlled frequency response
2 auxiliary digital I/Os
Digitally activated self-test
Digitally activated low power mode
Serial number and device ID
Single-supply operation: 3.15 V to 3.6 V
Operating temperature range: −40°C to +125°C
9.2 mm × 9.2 mm 16-terminal LGA
APPLICATIONS
Vibration analysis
Shock detection and event capture
Condition monitoring
Machine health
Instrumentation, diagnostics
Safety, shut-off sensing
Security sensing, tamper detection
GENERAL DESCRIPTION
The ADIS16220 iSensor® is a digital vibration sensor that com-
bines industry-leading iMEMS® sensing technology with signal
processing, data capture, and a convenient serial peripheral
interface (SPI). The SPI and data buffer structure provide
convenient access to wide-bandwidth sensor data. The 22 kHz
sensor resonance and 100.2 kSPS sample rate provide adequate
response for most machine-health applications. The averaging/
decimating filter provides optimization controls for lower
bandwidth applications.
An internal clock drives the data sampling system, which fills
the buffer memory for user access. The data capture function
has three different trigger modes. The automatic data collection
allows for periodic wake-up and capture, based on a programma-
ble duty cycle. The manual data capture mode allows the user to
initiate a data capture, providing power and read-rate optimiza-
tion. The event capture mode continuously updates the buffers
and monitors them for a preset trigger condition. This mode
captures pre-event data and post-event data and produces an
alarm indicator for driving an interrupt.
The ADIS16220 also offers a digital temperature sensor, digital
power supply measurements, and peak output capture.
The ADIS16220 comes in a 9.2 mm × 9.2 mm × 3.9 mm LGA
package that meets the Pb-free solder reflow profile require-
ments per JEDEC J-STD-020 and has an extended operating
temperature range of −40°C to +125°C.
FUNCTION BLOCK DIAGRAM
DIO1 DIO2 RST
VDD
SELF-TEST
I/O
ALARMS
POWER
MANAGEMENT
GND
MEMS
SENSOR
AIN1
AIN2
TEMP
SENSOR
ADIS16220
CONTROLLER
CLOCK
FILTER
CAPTURE
BUFFER
USER
CONTROL
REGISTERS
OUTPUT
DATA
REGISTERS
SPI
PORT
VREF
Figure 1.
CS
SCLK
DIN
DOUT
Rev. 0
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