EVAL-ADXL362Z-DB Analog Devices, EVAL-ADXL362Z-DB Datasheet

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EVAL-ADXL362Z-DB

Manufacturer Part Number
EVAL-ADXL362Z-DB
Description
Acceleration Sensor Development Tools enl Datalogger Board of ADXL362
Manufacturer
Analog Devices
Datasheet

Specifications of EVAL-ADXL362Z-DB

Rohs
yes
Tool Is For Evaluation Of
ADXL362
Acceleration
2 g, 4 g, 8 g
Sensing Axis
Triple Axis
Interface Type
SPI
Operating Voltage
1.6 V to 3.5 V
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Operating Current
1.8 uA
Output Type
Digital
Product
Development Boards
Sensitivity
1 mg/LSB, 2 mg/LSB, 4 mg/LSB
Factory Pack Quantity
1
Data Sheet
FEATURES
Ultralow power
High resolution: 1 mg/LSB
Built-in features for system-level power savings:
Low noise down to 175 µg/√Hz
Wide supply and I/O voltage ranges: 1.6 V to 3.5 V
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
Rev. B
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.
Trademarks and registered trademarks are the property of their respective owners.
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
Adjustable threshold sleep/wake modes for motion
Autonomous interrupt processing, without need for
Deep embedded FIFO minimizes host processor load
Awake state output enables implementation of
Operates off 1.8 V to 3.3 V rails
activation
microcontroller intervention, to allow the rest of the
system to be turned off completely
standalone, motion activated switch
SENSOR
3-AXIS
MEMS
GND
V
S
DEMODULATORS
AXIS
Document Feedback
FUNCTIONAL BLOCK DIAGRAM
ANTIALIASING
FILTERS
Micropower, 3-Axis, ±2 g/±4 g/±8 g
Digital Output MEMS Accelerometer
TEMPERATURE
SENSOR
Figure 1.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Technical Support
GENERAL DESCRIPTION
The
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
undersampling; it samples the full bandwidth of the sensor at all
data rates.
The
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
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
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
provisions for external control of sampling time and/or an
external clock.
The
and can interface, if necessary, to a host operating on a separate,
lower supply voltage. The
3.25 mm × 1.06 mm package.
ADXL362
ADXL362
ADXL362
12-BIT
ADC
is an ultralow power, 3-axis MEMS accelerometer
always provides 12-bit output resolution; 8-bit
operates on a wide 1.6 V to 3.5 V supply range,
©2012–2013 Analog Devices, Inc. All rights reserved.
ADXL362
ADXL362
DIGITAL
LOGIC,
FIFO,
AND
ADXL362
SPI
does not alias input signals by
V
DDI/O
is available in a 3 mm ×
INT1
INT2
MOSI
MISO
CS
SCLK
ADXL362
ADXL362
ADXL362
www.analog.com
ADXL362
is desired,
has

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EVAL-ADXL362Z-DB Summary of contents

Page 1

... Rev. B 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. ...

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ADXL362 TABLE OF CONTENTS Features .............................................................................................. 1 Applications ....................................................................................... 1 General Description ......................................................................... 1 Functional Block Diagram .............................................................. 1 Revision History ............................................................................... 3 Specifications ..................................................................................... 4 Absolute Maximum Ratings ............................................................ 6 Thermal Resistance ...................................................................... 6 Package Information .................................................................... 6 Recommended ...

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Data Sheet REVISION HISTORY 2/13—Rev Rev. B Change to Figure 7 ............................................................................ 8 Changes to Figure 11, Figure 12, and Figure 13 ............................ 9 Changes to Table 7 and Table 8 ..................................................... 14 Changes to Figure 31 ...................................................................... ...

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ADXL362 SPECIFICATIONS T = 25° 2 2.0 V, 100 Hz ODR, acceleration = 0 g, default register settings, unless otherwise noted I/O Table 1. Parameter SENSOR INPUT Measurement Range Nonlinearity Sensor Resonant ...

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Data Sheet 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 kHz Input Frequency 1 kHz to 250 kHz Turn-On Time Power-Up ...

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ADXL362 ABSOLUTE MAXIMUM RATINGS Table 2. Parameter Acceleration (Any Axis, Unpowered) Acceleration (Any Axis, Powered I/O All Other Pins Output Short-Circuit Duration (Any Pin to Ground) ESD Short Term Maximum Temperature Four Hours One Minute Temperature ...

Page 7

Data Sheet PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 6. Pin Function Descriptions Pin No. Mnemonic Description 1 V Supply Voltage for Digital I/ Connect. Not internally connected. 3 Reserved Reserved. Can be left unconnected or ...

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ADXL362 TYPICAL PERFORMANCE CHARACTERISTICS –80 –70 –60 –50 –40 –30 –20 – ZERO g OFFSET (mg) Figure 5. X-Axis Zero g Offset at 25°C, V ...

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Data Sheet –1.0 –0.8 –0.6 –0.4 –0.2 0 0.2 ZERO g OFFSET TEMPERATURE COEFFICIENT (mg/°C) Figure 11. X-Axis Zero g Offset Temperature Coefficient –1.0 –0.8 ...

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ADXL362 –2 –4 –6 –8 –10 –60 –40 – TEMPERATURE (°C) Figure 17. X-Axis Sensitivity Deviation from 25°C vs. Temperature— 16 Parts Soldered to PCB, ODR = 100 Hz ...

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Data Sheet 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 ...

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ADXL362 –20 –16 –12 –8 – CLOCK FREQUENCY DEVIATION FROM IDEAL (%) Figure 29. Clock Frequency Deviation from Ideal at 25° Rev. ...

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Data Sheet THEORY OF OPERATION The ADXL362 is a complete 3-axis acceleration measurement system that operates at extremely low power consumption levels. It measures both dynamic acceleration, resulting from motion or shock, and static acceleration, such as tilt. Acceleration is ...

Page 14

ADXL362 Current consumption varies somewhat with output data rate as shown in Figure 30, remaining below 5.0 µA over the entire range of data rates and operating voltages 1. 2. 2.5V ...

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Data Sheet POWER SAVINGS FEATURES Designed for the most power conscious applications, the includes several features (as described in this section) for enabling power savings at the system level, as well as at the device level. ULTRALOW POWER CONSUMPTION IN ...

Page 16

ADXL362 When using referenced inactivity detection, inactivity is detected when acceleration samples are within a user specified amount of an internally defined reference (as described by Equation 2) for a user defined amount of time. ABS(Acceleration − Reference) < Threshold ...

Page 17

Data Sheet Using the AWAKE Bit The AWAKE bit is a status bit that indicates whether the is awake or asleep. The device is awake when it has experienced an activity condition, and it is asleep when it has experienced ...

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ADXL362 ADDITIONAL FEATURES FREE FALL DETECTION Many digital output accelerometers include a built-in free fall detection feature. In the ADXL362, this function can be imple- mented using the inactivity interrupt. Refer to the Applications Information section for more details, including ...

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Data Sheet SERIAL COMMUNICATIONS The ADXL362 communicates via a 4-wire SPI and operates as a slave. Ignore data that is transmitted from the master device during writes to the ADXL362. As shown in Figure 36 to Figure 40, the MISO ...

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ADXL362 SCLK INSTRUCTION MOSI MISO SCLK INSTRUCTION MOSI MISO ...

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Data Sheet SCLK MSB IN MOSI MISO HIGH LOW SCLK t V MOSI MSB OUT MISO Table 9. SPI Digital Input/Output Parameter Digital Input Low Level Input Voltage (V ) ...

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ADXL362 Table 10. SPI Timing (T = 25° 2 Limit 1, 2 Parameter Min Max 1 f CLK 100 C SS 100 t CSH 10 t CSD ...

Page 23

Data Sheet REGISTER MAP Table 11. Register Summary Reg Name Bits Bit 7 Bit 6 0x00 DEVID_AD [7:0] 0x01 DEVID_MST [7:0] 0x02 PARTID [7:0] 0x03 REVID [7:0] 0x08 XDATA [7:0] 0x09 YDATA [7:0] 0x0A ZDATA [7:0] 0x0B STATUS [7:0] ERR_USER_ ...

Page 24

... DEVICE ID REGISTER Address: 0x00, Reset: 0xAD, Name: DEVID_AD This register contains the Analog Devices device ID, 0xAD. DEVICE ID: 0x1D REGISTER Address: 0x01, Reset: 0x1D, Name: DEVID_MST This register contains the Analog Devices MEMS device ID, 0x1D ...

Page 25

Data Sheet STATUS REGISTER Address: 0x0B, Reset: 0x40, Name: STATUS This register includes the following bits that describe various conditions of the ADXL362. Table 12. Bit Descriptions for STATUS Bits Bit Name Settings 7 ERR_USER_REGS 6 AWAKE 5 INACT 4 ...

Page 26

ADXL362 FIFO ENTRIES REGISTERS These registers indicate the number of valid data samples present in the FIFO buffer. This number ranges from 0 to 512 or 0x00 to 0x200. FIFO_ENTRIES_L contains the least significant byte. FIFO_ENTRIES_H contains the two most ...

Page 27

Data Sheet ACTIVITY THRESHOLD REGISTERS To detect activity, the ADXL362 compares the absolute value of the 12-bit (signed) acceleration data with the 11-bit (unsigned) THRESH_ACT value. See the Motion Detection section for more information on activity detection. The term, THRESH_ACT, ...

Page 28

ADXL362 The 16-bit value allows for long inactivity detection times. The maximum value is 0xFFFF or 65,535 samples. At the lowest output data rate, 12.5 Hz, this equates to almost 90 minutes. In this con- figuration, the accelerometer must be ...

Page 29

Data Sheet ACTIVITY/INACTIVITY CONTROL REGISTER Address: 0x27, Reset: 0x00, Name: ACT_INACT_CTL Table 13. Bit Descriptions for ACT_INACT_CTL Bits Bit Name Settings [7:6] UNUSED [5:4] LINK/LOOP INACT_REF 2 INACT_EN 1 ACT_REF 0 ACT_EN Description Unused Bits. Default ...

Page 30

ADXL362 FIFO CONTROL REGISTER Address: 0x28, Reset: 0x00, Name: FIFO_CONTROL Table 14. Bit Descriptions for FIFO_CONTROL Bits Bit Name Settings [7:4] UNUSED FIFO_TEMP [1:0] FIFO_MODE Description Unused Bits. Above Half. This bit is ...

Page 31

Data Sheet FIFO SAMPLES REGISTER Address: 0x29, Reset: 0x80, Name: FIFO_SAMPLES The value in this register specifies the number of samples to store in the FIFO. The AH bit in the FIFO_CONTROL register (Address 0x28) is used as the MSB ...

Page 32

ADXL362 Address: 0x2B, Reset: 0x00, Name: INTMAP2 Table 16. Bit Descriptions for INTMAP2 Bits Bit Name Settings 7 INT_LOW 6 AWAKE 5 INACT 4 ACT 3 FIFO_OVERRUN 2 FIFO_WATERMARK 1 FIFO_READY 0 DATA_READY Description 1 = INT2 pin is active ...

Page 33

Data Sheet FILTER CONTROL REGISTER Address: 0x2C, Reset: 0x13, Name: FILTER_CTL Table 17. Bit Descriptions for FILTER_CTL Bits Bit Name Settings Description [7:6] RANGE Measurement Range Selection. 00 ±2 g (reset default) 01 ± ± RES ...

Page 34

ADXL362 POWER CONTROL REGISTER Address: 0x2D, Reset: 0x00, Name: POWER_CTL Table 18. Bit Descriptions for POWER_CTL Bits Bit Name Settings 7 Reserved 6 EXT_CLK [5:4] LOW_NOISE WAKEUP 2 AUTOSLEEP [1:0] MEASURE ...

Page 35

Data Sheet SELF TEST REGISTER Address: 0x2E, Reset: 0x00, Name: SELF_TEST Refer to the Self Test section for information on the operation of the self test feature, and see the Using Self Test section for guidelines on how to use ...

Page 36

ADXL362 APPLICATIONS INFORMATION APPLICATION EXAMPLES This section includes a few application circuits, highlighting useful features of the ADXL362. Device Configuration This section outlines the procedure for configuring the device and acquiring data. In general, the procedure follows the sequence of ...

Page 37

Data Sheet Example: Implementing Free Fall Detection Many digital output accelerometers include a built-in free fall detection feature. In the ADXL362, implement this function using the inactivity interrupt. When an object is in true free fall, acceleration on all axes ...

Page 38

ADXL362 FIFO MODES The FIFO is a 512-sample memory buffer that can be used to save power, unburden the host processor, and autonomously record data. The 512 FIFO samples can be allotted as either: • 170 sample sets of concurrent ...

Page 39

... FIFO. For additional system level FIFO applications, refer to the AN-1025 Application Note, Utilization of the First In, First Out (FIFO) Buffer in Analog Devices, Inc. Digital Accelerometers. INTERRUPTS Several of the built-in functions of the ADXL362 interrupts to alert the host processor of certain status conditions. ...

Page 40

ADXL362 Alternate Functions of Interrupt Pins The INT1 and INT2 pins can be configured for use as input pins instead of for signaling interrupts. INT1 is used as an external clock input when the EXT_CLK bit (Bit 6) in the ...

Page 41

Data Sheet USING AN EXTERNAL CLOCK The ADXL362 has a built-in clock that, by default, is used for clocked internal operations. If desired, an external clock can be provided and used. To use an external clock, the EXT_CLK bit (Bit ...

Page 42

ADXL362 AXES OF ACCELERATION SENSITIVITY Figure 50. Axes of Acceleration Sensitivity (Corresponding Output Increases When Accelerated Along the Sensitive Axis OUT TOP OUT OUT LAYOUT AND DESIGN RECOMMENDATIONS Figure 52 shows ...

Page 43

... Temperature Range ADXL362BCCZ-RL −40°C to +85°C ADXL362BCCZ-RL7 −40°C to +85°C ADXL362BCCZ-R2 −40°C to +85°C EVAL-ADXL362Z −40°C to +85°C EVAL-ADXL362Z-DB −40°C to +85°C EVAL-ADXL362Z-MLP −40°C to +85°C EVAL-ADXL362Z-S −40°C to +85° RoHS Compliant Part. 3.30 1 ...

Page 44

... ADXL362 NOTES ©2012–2013 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D10776-0-2/13(B) Rev Page Data Sheet ...

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