Low Noise, Low Drift, Low Power,
3-Axis MEMS Accelerometers
Data Sheet
ADXL354/ADXL355
FEATURES
FUNCTIONAL BLOCK DIAGRAMS
V
V
1P8DIG
1P8ANA
RANGE
Hermetic package offers excellent long-term stability
0 g offset vs. temperature (all axes): 0.15 mg/°C maximum
Ultralow noise density (all axes): 20 μg/√Hz (ADXL354)
Low power, VSUPPLY (LDO enabled)
ADXL354 in measurement mode: 150 μA
ADXL355 in measurement mode: 200 μA
ADXL354/ADXL355 in standby mode: 21 μA
ADXL354 has user adjustable analog output bandwidth
ADXL355 digital output features
Digital serial peripheral interface (SPI)/I2C interfaces
20-bit analog-to-digital converter (ADC)
Data interpolation routine for synchronous sampling
Programmable high- and low-pass digital filters
Electromechanical self test
LDO
POWER
MANAGEMENT
V
LDO
SUPPLY
X
OUT
ANALOG
ST1
Y
OUT
FILTER
3-AXIS
SENSOR
ST2
OUT
CONTROL
LOGIC
STBY
TEMP
SENSOR
TEMP
ADXL354
V
DDIO
V
V
SS
SSIO
Figure 1. ADXL354 Functional Block Diagram
V
V
V
DDIO
1P8ANA
1P8DIG
POWER
MANAGEMENT
LDO
V
LDO
ADXL355
SUPPLY
Integrated temperature sensor
Voltage range options
ADC
INT1
INT2
DRDY
CS/SCL
SCLK/V
MOSI/SDA
CONTROL
LOGIC
DIGITAL
FILTER
ADC
ADC
ANALOG
FILTER
V
V
SUPPLY with internal regulators: 2.25 V to 3.6 V
1P8ANA, V1P8DIG with internal low dropout regulator (LDO)
bypassed: 1.8 V typical 10%
3-AXIS
SENSOR
SSIO
TEMP
SENSOR
SERIAL
I/O
FIFO
ADC
MISO/ASEL
Operating temperature range: −40°C to +125°C
14-terminal, 6 mm × 6 mm × 2.1 mm, LCC package,
0.26 grams
V
V
SSIO
SS
Figure 2. ADXL355 Functional Block Diagram
APPLICATIONS
Inertial measurement units (IMUs)/altitude and heading
reference systems (AHRSs)
Platform stabilization systems
Structural health monitoring
Seismic imaging
Tilt sensing
Robotics
Condition monitoring
GENERAL DESCRIPTION
The analog output ADXL354 and the digital output ADXL355
are low noise density, low 0 g offset drift, low power, 3-axis
accelerometers with selectable measurement ranges. The
ADXL354B supports the ±2 g and ±4 g ranges, the ADXL354C
supports the ±2 g and ±± g ranges, and the ADXL355 supports
the ±2.04± g, ±4.096 g, and ±±.ꢀ92 g ranges. The ADXL354/
ADXL355 offer industry leading noise, minimal offset drift over
temperature, and long term stability enabling precision
applications with minimal calibration.
Highly integrated in a compact form factor, the low power
ADXL355 is ideal in an Internet of Things (IoT) sensor node
and other wireless product designs.
The ADXL355 multifunction pin names may be referenced by
their relevant function only for either the SPI or I2C interfaces.
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. 0
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