ADXL363 Datasheet, PDF (1/48 Pages) Analog Devices – Micropower 3-Sensor Combination Including Acceleration and Temperature

Data Sheet
Micropower 3-Sensor Combination
Including Acceleration and Temperature
ADXL363
FEATURES
GENERAL DESCRIPTION
Accelerometer, temperature sensor, and provision for 3^rd
The ADXL363 is an ultralow power, three-sensor combination
analog sensor input
consisting of a 3-axis MEMS accelerometer, a temperature sensor,
All sensors sampled synchronously
and an on-board ADC input for synchronous conversion of an
Up to 400 Hz output data rate (ODR)
external signal. The entire system consumes less than 2 µA at a
Samples can be synchronized to external trigger
100 Hz output data rate and 270 nA when in motion triggered
Ultralow power
wake-up mode.
1.95 µA at 100 Hz ODR, 2.0 V supply, all sensors on
270 nA at 6 Hz motion activated wake-up mode
10 nA standby current
12-bit resolution for all sensors
Acceleration scale factor down to 1 mg/LSB
Temperature scale factor: 0.065°C/LSB (average)
Built-in features for motion-based system level power savings
Adjustable threshold sleep/wake modes for motion
activation
Autonomous interrupt processing, without need for
The ADXL363 communicates via a serial port interface (SPI)
and always provides 12-bit output resolution for all three
sensors.
The ADXL363 accelerometer provides selectable measurement
ranges of ±2 g, ±4 g, and ±8 g, with a resolution of 1 mg/LSB on
the ±2 g range. Unlike accelerometers that use power duty
cycling to achieve low power consumption, the ADXL363 does
not alias input signals by undersampling; it samples the full
bandwidth of the sensor at all data rates.
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
Wide supply and I/O voltage ranges: 1.6 V to 3.5 V
Operates off 1.8 V to 3.3 V rails
Power can be derived from coin cell battery
The ADXL363 temperature sensor operates with a scale factor
of 0.065°C (typical). Acceleration and temperature data can be
stored in a 512-sample multimode FIFO buffer, allowing up to
13 sec of data to be stored.
In addition to the accelerometer and temperature sensor, the
ADXL363 also provides access to an internal ADC for
synchronous conversion of an additional analog input.
SPI digital interface
The ADXL363 operates on a wide 1.6 V to 3.5 V supply range,
Small and thin 3 mm × 3.25 mm × 1.06 mm package
and can interface, if necessary, to a host operating on a separate,
APPLICATIONS
Home healthcare devices
lower supply voltage. The ADXL363 is available in a 3 mm ×
3.25 mm × 1.06 mm package.
Wireless sensors
Motion enabled metering devices
FUNCTIONAL BLOCK DIAGRAM
V_S
V_{DD I/O}
3-AXIS
MEMS
SENSOR
GND
AXIS
ANTIALIASING
DEMODULATORS
FILTERS
TEMPERATURE
SENSOR
Figure 1.
12-BIT
ADC
DIGITAL
FIFO
AND
SPI
INT1
INT2
MOSI
MISO
CS
SCLK
ADC_IN
ADXL363
Rev. 0
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