ADXL356 Просмотр технического описания (PDF) - Analog Devices
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ADXL356 Datasheet PDF : 42 Pages
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Data Sheet
Low Noise, Low Drift, Low Power,
3-Axis MEMS Accelerometers
ADXL356/ADXL357
FEATURES
Hermetic package offers optimal long-term stability
0 g offset vs. temperature (all axes): 0.75 mg/°C maximum
Ultralow noise spectral density (all axes): 75 μg/√Hz
Low power, VSUPPLY (LDO regulator enabled)
ADXL356 in measurement mode: 150 μA
ADXL357 in measurement mode: 200 μA
ADXL356/ADXL357 in standby mode: 21 μA
ADXL356 has user adjustable analog output bandwidth
ADXL357 digital output features
Digital SPI and limited I2C interfaces supported
20-bit ADC
Data interpolation routine for synchronous sampling
Programmable high- and low-pass digital filters
Integrated temperature sensor
Voltage range options
VSUPPLY with internal regulators: 2.25 V to 3.6 V
V1P8ANA, V1P8DIG with internal LDO regulator bypassed: 1.8 V
typical ± 10%
Operating temperature range: −40°C to +125°C
14-terminal, 6 mm × 5.6 mm × 2.2 mm, LCC package
APPLICATIONS
Inertial measurement units (IMUs)/attitude and heading
reference systems (AHRSs)
Platform stabilization systems
Structural health monitoring
Seismic imaging
Tilt sensing
Robotics
Condition monitoring
GENERAL DESCRIPTION
The analog output ADXL356 and the digital output ADXL357
are low noise density, low 0 g offset drift, low power, 3-axis
accelerometers with selectable measurement ranges. The
ADXL356B supports the ±10 g and ±20 g ranges, the ADXL356C
supports the ±10 g and ±40 g ranges, and the ADXL357 supports
the ±10 g, ±20 g, and ±40 g ranges.
The ADXL356/ADXL357 offer industry leading noise, minimal
offset drift over temperature, and long-term stability, enabling
precision applications with minimal calibration.
FUNCTIONAL BLOCK DIAGRAMS
V1P8ANA
V1P8DIG
RANGE
VSUPPLY
XOUT
YOUT
ZOUT
TEMP
LDO
LDO
ANALOG
FILTER
Y
X
Z
3-AXIS
SENSOR
TEMP
SENSOR
ADXL356
POWER
MANAGEMENT
CONTROL
LOGIC
ST1
ST2
STBY
VDDIO
V1P8ANA
VSSIO
VSS
Figure 1. ADXL356
V1P8DIG
VDDIO
VSUPPLY
LDO
POWER
LDO ADXL357 MANAGEMENT
Y
X
Z
3-AXIS
SENSOR
ANALOG
FILTER
TEMP
SENSOR
ADC
ADC
ADC
ADC
DIGITAL
FILTER
CONTROL
LOGIC
FIFO
SERIAL
I/O
VSSIO
VSS
Figure 2. ADXL357
INT1
INT2
DRDY
CS/SCL
SCLK/VSSIO
MOSI/SDA
MISO/ASEL
The low drift, low noise, and low power ADXL357 enables
accurate tilt measurement in an environment with high
vibration. The low noise of the ADXL356 over higher
frequencies is ideal for condition-based monitoring and other
vibration sensing applications.
The ADXL357 multifunction pin names may be referenced only
by their relevant function for either the serial peripheral
interface (SPI) or limited I2C interface.
1 Protected by U.S. Patents 8,472,270; 9,041,462; 8,665,627; 8,917,099; 6,892,576; 9,297,825; and 7,956,621.
Rev. A
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