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PDF ADIS16006 Data sheet ( Hoja de datos )
| Número de pieza | ADIS16006 | |
| Descripción | Dual-Axis +-5 Accelerometer | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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FEATURES
Dual-axis accelerometer
SPI® digital output interface
Internal temperature sensor
Highly integrated; minimal external components
Bandwidth externally selectable
1.9 mg resolution at 60 Hz
Externally controlled electrostatic self-test
3.0 V to 5.25 V single-supply operation
Low power: <2 mA
3500 g shock survival
7.2 mm × 7.2 mm × 3.6 mm package
APPLICATIONS
Industrial vibration/motion sensing
Platform stabilization
Dual-axis tilt sensing
Tracking, recording, analysis devices
Alarms, security devices
Dual-Axis ±5 g Accelerometer
with SPI Interface
ADIS16006
GENERAL DESCRIPTION
The ADIS16006 is a low cost, low power, complete dual-axis
accelerometer with an integrated serial peripheral interface
(SPI). An integrated temperature sensor is also available on the
SPI interface. The ADIS16006 measures acceleration with a full-
scale range of ±5 g (minimum). The ADIS16006 can measure
both dynamic acceleration (that is, vibration) and static accel-
eration (that is, gravity).
The typical noise floor is 200 μg/√Hz, allowing signals below
1.9 mg (60 Hz bandwidth) to be resolved.
The bandwidth of the accelerometer is set with optional
capacitors, CX and CY, at the XFILT and YFILT pins. Digital
output data for both axes is available via the serial interface.
An externally driven self-test pin (ST) allows the user to verify
the accelerometer functionality.
The ADIS16006 is available in a 7.2 mm × 7.2 mm × 3.6 mm,
12-terminal LGA package.
FUNCTIONAL BLOCK DIAGRAM
VCC
ADIS16006
DUAL-AXIS
±5g
ACCELEROMETER
CDC
SERIAL
INTERFACE
SCLK
DIN
DOUT
CS
TCS
TEMP
SENSOR
COM
ST
YFILT
CY
XFILT
CX
Figure 1.
Rev. 0
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
©2006 Analog Devices, Inc. All rights reserved.
1 page  
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tACQ
tCONVERT
CS
t1
SCLK
t2
THREE-STATE
DOUT
DIN
1
t4
t5
DON’T
CARE
t6
23
t7
4 LEADING ZEROS
4
5
t3
DB11
6
DB10
DB9
ZERO
ZERO
ZERO
ADD0
ONE
ZERO
PM0
Figure 3. Accelerometer Serial Interface Timing Diagram
15
ADIS16006
16
t8
DB0
THREE-STATE
TCS
SCLK
THREE-
STATE
DOUT
t1
12
t3
LEADING
ZERO
t6
3
t7
DB9
4
DB8
11
DB0
DIN
Figure 4. Temperature Serial Interface Timing Diagram
15
16
t8
THREE-STATE
Rev. 0 | Page 5 of 16
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THEORY OF OPERATION
The ADIS16006 is a low cost, low power, complete dual-axis
accelerometer with an integrated serial peripheral interface
(SPI) and an integrated temperature sensor whose output is
also available on the SPI interface. The ADIS16006 is capable
of measuring acceleration with a full-scale range of ±5 g
(minimum). The ADIS16006 can measure both dynamic
acceleration (that is, vibration) and static acceleration (that is,
gravity).
SELF-TEST
The ST pin controls the self-test feature. When this pin is set to
VCC, an electrostatic force is exerted on the beam of the acceler-
ometer. The resulting movement of the beam allows the user to
test if the accelerometer is functional. The typical change in
output is 801 mg (corresponding to 205 LSB) for VCC = 5.0 V.
This pin may be left open-circuit or connected to common in
normal use. The ST pin should never be exposed to voltage
greater than VCC + 0.3 V. If the system design is such that this
condition cannot be guaranteed (that is, multiple supply voltages
present), a low VF clamping diode between ST and VCC is
recommended.
SERIAL INTERFACE
The serial interface on the ADIS16006 consists of five wires: CS,
TCS, SCLK, DIN, and DOUT. Both accelerometer axes and the
temperature sensor data are available on the serial interface.
The CS and TCS are used to select the accelerometer or tem-
perature sensor outputs, respectively. CS and TCS cannot be
active at the same time.
The SCLK input provides access to data from the internal data
registers.
ACCELEROMETER SERIAL INTERFACE
Figure 3 shows the detailed timing diagram for serial interfacing to
the accelerometer in the ADIS16006. The serial clock provides
the conversion clock. CS initiates the conversion process and
data transfer and also frames the serial data transfer for the
accelerometer output. The accelerometer output is sampled on
the second rising edge of the SCLK input after the falling edge
of the CS. The conversion requires 16 SCLK cycles to complete.
The rising edge of CS puts the bus back into three-state. If CS
remains low, the next digital conversion is initiated. The details
for the control register bit functions are shown in Table 6.
ADIS16006
Accelerometer Control Register
MSB LSB
DONTC ZERO ZERO ZERO ZERO ONE ZERO PM0
Table 6. Accelerometer Control Register Bit Functions
Bit Mnemonic Comments
7
DONTC
Don’t care. Can be 1 or 0.
6, 5, 4 ZERO
These bits should be held low.
3 ADD0
This address bit selects the X-axis or Y-axis
outputs. A 0 selects the X-axis; a 1 selects
the Y-axis.
2 ONE
This bit should be held high.
1 ZERO
This bit should be held low.
0 PM0
This bit selects the operation mode for
the accelerometer; set to 0 for normal
operation and 1 for power-down mode.
Power-Down
By setting PM0 to 1 when updating the accelerometer control
register, the ADIS16006 is put into a shutdown mode. The
information stored in the control register is maintained during
shutdown. The ADIS16006 changes modes as soon as the control
register is updated. Therefore, if the part is in shutdown mode
and PM0 is changed to 0, the part powers up on the 16th SCLK
rising edge.
ADD0
By setting ADD0 to 0 when updating the accelerometer control
register, the X-axis output is selected. By setting ADD0 to 1, the
Y-axis output is selected.
ZERO
ZERO is defined as the logic low level.
ONE
ONE is defined as the logic high level.
DONTC
DONTC is defined as don’t care and can be a low or high logic
level.
Accelerometer Conversion Details
Every time the accelerometer is sampled, the sampling function
discharges the internal CX or CY filtering capacitors by up to 2%
of their initial values (assuming no additional external filtering
capacitors have been added). The recovery time for the filter
capacitor to recharge is approximately 10 μs. Thus, sampling the
accelerometer at a rate of 10 kSPS or less does not induce a
sampling error. However, as sampling frequencies increase
above 10 kSPS, one can expect sampling errors to attenuate the
actual acceleration levels.
Rev. 0 | Page 11 of 16
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| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet ADIS16006.PDF ] | |
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