Low Noise, Low Drift, Low Power,
3-Axis MEMS Accelerometers
Data Sheet
ADXL356/ADXL357
FEATURES
FUNCTIONAL BLOCK DIAGRAMS
V
V
1P8DIG
1P8ANA
RANGE
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
LDO
POWER
V
LDO
SUPPLY
MANAGEMENT
Y
X
OUT
X
ANALOG
FILTER
Z
ST1
Y
Z
OUT
3-AXIS
SENSOR
ST2
OUT
CONTROL
LOGIC
STBY
TEMP
SENSOR
TEMP
ADXL356
V
DDIO
Digital SPI and limited I2C interfaces supported
20-bit ADC
V
V
SS
SSIO
Figure 1. ADXL356
Data interpolation routine for synchronous sampling
Programmable high- and low-pass digital filters
Integrated temperature sensor
V
V
V
DDIO
1P8ANA
1P8DIG
POWER
MANAGEMENT
LDO
X
V
LDO
ADXL357
SUPPLY
Voltage range options
Y
ADC
INT1
INT2
DRDY
CONTROL
LOGIC
V
V
SUPPLY with internal regulators: 2.25 V to 3.6 V
1P8ANA, V1P8DIG with internal LDO regulator bypassed: 1.8 V
typical 10%
DIGITAL
ADC
ADC
ANALOG
FILTER
Z
FILTER
3-AXIS
SENSOR
CS/SCL
SCLK/V
SSIO
TEMP
SENSOR
SERIAL
I/O
FIFO
ADC
MOSI/SDA
MISO/ASEL
Operating temperature range: −40°C to +125°C
14-terminal, 6 mm × 5.6 mm × 2.2 mm, LCC package
V
V
SSIO
SS
Figure 2. ADXL357
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 ±±0 g and ±ꢀ0 g ranges, the ADXL356C
supports the ±±0 g and ±ꢁ0 g ranges, and the ADXL357 supports
the ±±0 g, ±ꢀ0 g, and ±ꢁ0 g ranges.
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 IꢀC interface.
The ADXL356/ADXL357 offer industry leading noise, minimal
offset drift over temperature, and long-term stability, enabling
precision applications with minimal calibration.
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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