High Precision, Low-g,
Digital Triaxial Accelerometer
Data Sheet
FEATURES
High performance, triaxial digital output accelerometer
±14.2 g full-scale range at 16-bit resolution (0.434 mg/LSB)
2 kHz output sample rate with optional data FIFOs
Programmable filter response
20 Hz, 46 Hz, 92 Hz, 184 Hz
Continuous electromechanical self-test
Additional key-on and on demand self-test routines
Temperature compensated, high precision zero-g bias and
sensitivity performance
X-/Y-/Z-axis offset adjust
Low quiescent current draw
High linearity performance
−40°C to +105°C temperature range
Qualified for automotive applications
APPLICATIONS
Vehicle dynamic control (VDC)
Electronic stability program (ESP)
Electronic chassis control
Platform stabilization/leveling
GENERAL DESCRIPTION
The ADXL700 device is a high precision, triaxial accelerometer
designed for electronic stability control and other high perfor-
mance applications. A built in temperature compensation routine
ensures sensitivity stability to better than ±3% across the entire
temperature range. The ADXL700 is designed with selectable
−3 dB filter corner frequencies to satisfy a range of applications,
and the 2 kHz output data rate allows sufficient oversampling of
the acceleration information.
The acceleration data output from the device is a true 16-bit
word and is contained in a 32-bit SPI transaction. The SPI
interface contains additional fault detection bits and data
formatting bits designed to assist high reliability applications.
SPI communications are compatible up to 8 MHz. The 16-bit
acceleration data-word offers a resolution of 0.434 mg/LSB for
the ±14.2 g full-scale range of the device.
The ADXL700 is available in an SOIC package with an inverted
paddle for improved EMI/RFI robustness. The ADXL700 operates
at both 3.3 V and 5 V, and is specified to operate across the full
automotive temperature range of −40°C to +105°C.
FUNCTIONAL BLOCK DIAGRAM
Figure 1.
For more information about the ADXL700, please contact the Analog Devices, Inc., Customer Interaction Center at
http://www.analog.com/en/content/technical_support_page/fca.html to connect with a technical support specialist.
SPI INTERFACE
SCLK
CS
MOSI
MISO
IOVDD
DVDD
VCM
X/Y
AFE
THIRD-ORDER
SINC FILTER
IIR FILTER
BYPASS
CALIBRATION FORMAT
Σ-Δ
MOD
THIRD-ORDER
SINC FILTER
IIR FILTER
BYPASS
CALIBRATION FORMAT
Σ-Δ
MOD
Z
AFE
THIRD-ORDER
SINC FILTER
IIR FILTER
BYPASS
CALIBRATION
FORMAT
Σ-Δ
MOD
TEMP
SENSOR
THIRD-ORDER
SINC FILTER
IIR FILTER CALIBRATION
FORMAT
Σ-Δ
MOD
SENSOR
DRIVERS
SELF
TEST
CLOCK
CAL COEFFICIENT
GENERATION
DSP
TIMING GEN
CONTROL
REGISTER
MASTER DSP
STATE MACHINE
VDD
MONITOR
POR
ERROR
HANDLER
OTP
SERIAL
NUMBER
CONFIG
TRIM
COEFFICIENT
ERROR
FLAGS
REGVDD
AVDD
REGGND
IOGND
VDD
REG
REFERENCE
ADXL700
13199-001
Rev. Sp0 Document Feedback
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