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PDF ADXL362 Data sheet ( Hoja de datos )
| Número de pieza | ADXL362 | |
| Descripción | Digital-Output MEMS Accelerometer | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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Data Sheet
Micropower, 3-Axis, ±2 g/±4 g/±8 g
Digital Output MEMS Accelerometer
ADXL362
FEATURES
GENERAL DESCRIPTION
Ultralow power
Power can be derived from coin cell battery
1.8 µA @ 100 Hz ODR, 2.0 V supply
3.0 µA @ 400 Hz ODR, 2.0 V supply
270 nA motion activated wake-up mode
10 nA standby current
High resolution: 1 mg/LSB
Built-in features for system-level power savings:
Adjustable threshold sleep/wake modes for motion
activation
Autonomous interrupt processing, without need for
microcontroller intervention, to allow the rest of the
system to be turned off completely
Deep embedded FIFO minimizes host processor load
Awake state output enables implementation of
standalone, motion activated switch
Low noise down to 175 µg/√Hz
Wide supply and I/O voltage ranges: 1.6 V to 3.5 V
Operates off 1.8 V to 3.3 V rails
Acceleration sample synchronization via external trigger
On-chip temperature sensor
SPI digital interface
Measurement ranges selectable via SPI command
Small and thin 3 mm × 3.25 mm × 1.06 mm package
APPLICATIONS
Hearing aids
Home healthcare devices
Motion enabled power save switches
Wireless sensors
Motion enabled metering devices
The ADXL362 is an ultralow power, 3-axis MEMS accelerometer
that consumes less than 2 µA at a 100 Hz output data rate and
270 nA when in motion triggered wake-up mode. Unlike
accelerometers that use power duty cycling to achieve low power
consumption, the ADXL362 does not alias input signals by
undersampling; it samples the full bandwidth of the sensor at all
data rates.
The ADXL362 always provides 12-bit output resolution; 8-bit
formatted data is also provided for more efficient single-byte
transfers when a lower resolution is sufficient. Measurement
ranges of ±2 g, ±4 g, and ±8 g are available, with a resolution of
1 mg/LSB on the ±2 g range. For applications where a noise level
lower than the normal 550 µg/√Hz of the ADXL362 is desired,
either of two lower noise modes (down to 175 µg/√Hz typical)
can be selected at minimal increase in supply current.
In addition to its ultralow power consumption, the ADXL362
has many features to enable true system level power reduction.
It includes a deep multimode output FIFO, a built-in micropower
temperature sensor, and several activity detection modes including
adjustable threshold sleep and wake-up operation that can run
as low as 270 nA at a 6 Hz (approximate) measurement rate. A
pin output is provided to directly control an external switch when
activity is detected, if desired. In addition, the ADXL362 has
provisions for external control of sampling time and/or an
external clock.
The ADXL362 operates on a wide 1.6 V to 3.5 V supply range,
and can interface, if necessary, to a host operating on a separate,
lower supply voltage. The ADXL362 is available in a 3 mm ×
3.25 mm × 1.06 mm package.
FUNCTIONAL BLOCK DIAGRAM
VS VDDI/O
3-AXIS
MEMS
SENSOR
AXIS
ANTIALIASING
DEMODULATORS
FILTERS
TEMPERATURE
SENSOR
12-BIT
ADC
DIGITAL
LOGIC,
FIFO,
AND
SPI
INT1
INT2
MOSI
MISO
CS
SCLK
ADXL362
GND
Figure 1.
Rev. C
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevices for itsuse,nor foranyinfringementsofpatentsor 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 ©2012–2014 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
1 page  
Data Sheet
ADXL362
Parameter
Supply Current
Measurement Mode
Normal Operation
Low Noise Mode
Ultralow Noise Mode
Wake-Up Mode
Standby
Power Supply Rejection Ratio (PSRR)
Input Frequency 100 Hz to 1 kHz
Input Frequency 1 kHz to 250 kHz
Turn-On Time
Power-Up to Standby
Measurement Mode Instruction to
Valid Data
TEMPERATURE SENSOR
Bias Average
Standard Deviation
Sensitivity Average
Standard Deviation
Sensitivity Repeatability
Resolution
ENVIRONMENTAL
Operating Temperature Range
Test Conditions/Comments
100 Hz ODR (50 Hz bandwidth)5
Min
CS = 1.0 µF, RS = 100 Ω, CIO = 1.1 µF, input
is 100 mV sine wave on VS
100 Hz ODR (50 Hz bandwidth)
@ 25°C
−40
Typ
1.8
3.3
13
0.27
0.01
−13
−20
5
4/ODR
350
290
0.065
0.0025
±0.5
12
Max
+85
1 All minimum and maximum specifications are guaranteed. Typical specifications may not be guaranteed.
2 Cross axis sensitivity is defined as coupling between any two axes.
3 −40°C to +25°C or +25°C to +85°C.
4 Self test change is defined as the output change in g when self test is asserted. Different supplies and g ranges cause different self test changes.
5 Refer to Figure 30 for current consumption at other bandwidth settings.
Unit
µA
µA
µA
µA
µA
dB
dB
ms
LSB
LSB
°C/LSB
°C/LSB
°C
Bits
°C
Rev. C | Page 5 of 43
5 Page 
Data Sheet
35
30
25
20
15
10
5
0
1.50 1.55 1.60 1.65 1.70 1.75 1.80 1.85 1.90 1.95 2.00 2.05
CURRENT CONSUMPTION (µA)
Figure 23. Current Consumption at 25°C, Normal Mode,
ODR = 100 Hz, VS = 2 V
30
25
20
15
10
5
0
2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8
CURRENT CONSUMPTION (µA)
Figure 24. Current Consumption at 25°C, Low Noise Mode,
ODR = 100 Hz, VS = 2 V
35
30
25
20
15
10
5
0
8
9 10 11 12 13 14 15 16
CURRENT CONSUMPTION (µA)
Figure 25. Current Consumption at 25°C, Ultralow Noise Mode,
ODR = 100 Hz, VS = 2 V
ADXL362
70
60
50
40
30
20
10
0
50
100 150 200 250 300 350
CURRENT CONSUMPTION (nA)
400
Figure 26. Current Consumption at 25°C, Wake-Up Mode, VS = 2 V
12
10
8
6
4
2
0
–200
0
200 400 600 800 1000
TEMPERATURE SENSOR BIAS AT 25°C (LSB)
Figure 27. Temperature Sensor Response at 25°C, VS = 2 V
40
35
30
25
20
15
10
5
0
14.4 14.6 14.8 15.0 15.2 15.4 15.6 15.8 16.0 16.2 16.4 16.6 16.8
TEMPERATURE SENSOR SCALE FACTOR (LSB/°C)
Figure 28. Temperature Sensor Scale Factor, VS = 2 V
Rev. C | Page 11 of 43
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet ADXL362.PDF ] | |
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