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ADIS16220 Schematic ( PDF Datasheet ) - Analog Devices

Teilenummer ADIS16220
Beschreibung Programmable Digital Vibration Sensor
Hersteller Analog Devices
Logo Analog Devices Logo 




Gesamt 16 Seiten
ADIS16220 Datasheet, Funktion
www.DataSheet4U.com
Preliminary Technical Data
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
Conditional 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 a signal
processor. It provides a buffer memory for high speed data capture,
along with a convenient serial interface for data collection and
configuration. 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 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 serial peripheral interface (SPI) and data buffer structure
provide convenient access to wide-bandwidth sensor data. 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. PrD
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.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2009 Analog Devices, Inc. All rights reserved.






ADIS16220 Datasheet, Funktion
ADIS16220www.DataSheet4U.com
ABSOLUTE MAXIMUM RATINGS
Table 3.
Parameter
Acceleration
Any Axis, Unpowered
Any Axis, Powered
VDD to GND
Digital Input Voltage to GND
Digital Output Voltage to GND
Analog Inputs to GND
Operating Temperature Range
Storage Temperature Range
Rating
2000 g
2000 g
−0.3 V to +6.0 V
−0.3 V to +5.3 V
−0.3 V to VDD + 0.3 V
−0.3 V to +3.6 V
−40°C to +125°C
−65°C to +125°C
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
Preliminary Technical Data
Table 4. Package Characteristics
Package Type
θJA
θJC
16-Terminal LGA 250°C/W 25°C/W
ESD CAUTION
Device Weight
0.6 g
Rev. PrD | Page 6 of 16

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ADIS16220 pdf, datenblatt
ADIS16220www.DataSheet4U.com
Manual Capture Mode
This is the factory-default mode, where the sensor waits for a
user-driven trigger to execute a data capture. Set GLOB_CMD[11]
= 1 (DIN = 0xBF08) to execute a data capture in this mode. Set
CAPT_CTRL[6:0] = 0x02 to place the device in manual mode
and enable the control bit that shuts the device down while it
waits for the data capture command.
Automatic Capture Mode
In automatic mode, the device executes data captures without
user input, on a periodic basis. Configuring the device for
this mode requires three steps: program the capture period
using CAPT_PRD, set the device in automatic mode using
CAPT_CTRL[3:2], and start the capture process/clock using
CLOB_CMD[11]. See Table 15 for an example of setting up
automatic mode.
Table 14. CAPT_PRD Register Bit Descriptions
Bit Description (Default = 0x0000)
[15:10]
Not used
[9:8] Scale
00 = 1 second/LSB
01 = 1 minute/LSB
10 = 1 hour/LSB
[7:0] Data bits, binary format
Table 15. Example Event Mode Configuration Sequence
DIN Description
0x9F02, Set time scale to hours
0x9E18 Set the time between captures to 24 hours
0x9C06 Set the device for trigger mode and enable shutdown
0xBF08 Start: device executes a capture and shuts down
Event Capture Mode
The event capture mode triggers a data capture when the data
meets the preset conditions in the alarm registers (ALM_xxxx).
The ALM_CTRL register provides trigger source selection and
configuration controls, while the ALM_MAGx registers provide
threshold level controls.
Table 16. ALM_CTRL Bit Descriptions
Bit Description (Default = 0x0000)
[15:6] Not used
[5] System alarm comparison polarity
1 = trigger when less than ALM_MAGS[11:0]
0 = trigger when greater than ALM_MAGS[11:0]
[4] System alarm trigger source
1 = temperature, 0 = power supply
[3] System alarm enable (ALM_MAGS)
1 = enabled, 0 = disabled
[2] AIN2 alarm enable (ALM_MAG2)
1 = enabled, 0 = disabled
[1] AIN1 alarm enable (ALM_MAG1)
1 = enabled, 0 = disabled
[0] Acceleration alarm enable (ALM_MAGA)
1 = enabled, 0 = disabled
Preliminary Technical Data
Table 17. ALM_MAGA Bit Descriptions
Bit Description (Default = 0x0000)
[15:0]
Data bits for acceleration threshold setting;
twos complement, 19.073 mg/LSB.
Range = +8191/−8192 LSBs
Table 18. ALM_MAG1 and ALM_MAG2 Bit Descriptions
Bit Description (Default = 0x0000)
[15:0]
Data bits for AIN1, AIN2 signal threshold setting;
twos complement, 350.18 μV/LSB.
Range = +8191/−8192 LSBs
Table 19. ALM_MAGS Bit Descriptions
Bit Description (Default = 0x0000)
[15:12] Not used.
[11:0]
Data bits for temperature or supply threshold setting.
Binary format matches CAPT_TEMP or CAPT_SUPPLY
format, depending on the ALM_CTRL[4] setting.
Configuring the device in the event capture mode requires four
steps: select which data channels to enable (ALM_CTRL[5:0]),
set each threshold (ALM_MAGx), select event capture mode
(CAPT_CTRL[3:2]) and start the capture mode operation
(GLOB_CMD[11]). Each ALM_MAGx register has a
corresponding error flag in the DIAG_STAT register for
software monitoring of alarm conditions. Note that the system
alarm has an error flag in DIAG_STAT[11] but cannot trigger a
data capture.
Table 20. Example Event Mode Configuration Sequence
DIN Description
0xA00C, Set acceleration trigger point at >+10 g and <−10 g by
0xA102 setting ALM_MAGA = 0x020C.
0xA634, Set temperature error flag level at +60°C by setting
0xA700 ALM_MAGS = 0x00C4.
0xA839
Set the system alarm as a greater-than-temperature
configuration and enable both acceleration and system
alarms by setting ALM_CTRL[5:0] = 0x39.
0xB61F Keep DIO1 as a busy indicator and set DIO2 as a positive
alarm indicator by setting DIO_CTRL[7:0] = 0x1F.
0x9C5A
Set capture into event mode, enable automatic capture
store to flash, enable power-down between captures,
and set pre-event capture length to 128 samples by
setting CAPT_CTRL[7:0] = 0x5A.
0xBF08 Start the event capture mode by setting GLOB_CMD[11] = 1
GLOBAL COMMANDS
The GLOB_CMD register provides an array of single-write
commands for convenience. Setting the assigned bit in Table 21
to 1 activates each function. When the function completes, the
bit restores itself to 0. For example, clear the capture buffers using
a single DIN write sequence, DIN = 0xBF01. All of the commands
in the GLOB_CMD register require the power supply to be
within normal limits for the execution times listed in Table 21.
The execution times reflect the factory default configuration
where applicable and describe the time required to return to
normal operation.
Rev. PrD | Page 12 of 16

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