High Performance,
Digital Output Gyroscope
Preliminary Technical Data
ADXRS450
FEATURES
GENERAL DESCRIPTION
Complete rate gyroscope on a single chip
300°/sec angular rate sensing
The ADXRS450 is an angular rate sensor (gyroscope) intended
for industrial, medical, instrumentation, stabilization, and other
high performance applications. An advanced, differential, quad
sensor design rejects the influence of linear acceleration, enabling
the ADXRS450 to operate in exceedingly harsh environments
where shock and vibration are present.
High vibration rejection over a wide frequency range
Excellent 25°/hr null offset stability
Internally temperature compensated
2000 g powered shock survivability
SPI digital output with 16-bit data-word
Low noise and low power
3.3 V and 5V operation
−40°C to +105°C operation
Ultra small, light, and RoHS compliant
Two package options
The ADXRS450 utilizes an internal, continuous self-test archi-
tecture. The integrity of the electromechanical system is checked
by applying a high frequency electrostatic force to the sense
structure to generate a rate signal that can be differentiated from
the baseband rate data and internally analyzed.
Low cost SOIC_CAV package for yaw rate (Z-axis) response
Innovative ceramic vertical mount package, which can be
oriented for pitch, roll, or yaw response
The ADXRS450 is capable of sensing angular rate of up to
±±00ꢀ°sec. Angular rate data is presented as a 16-bit word, as
part of a ±2-bit SPI message.
APPLICATIONS
Rotation sensing medical applications
Rotation sensing industrial and instrumentation
High performance platform stabilization
The ADXRS450 is available in a cavity plastic 16-lead SOIC
(SOIC_CAV) and an SMT-compatible vertical mount package
(LCC_V), and is capable of operating across both a wide voltage
range (±.± V to 5 V) and temperature range (−40ꢀC to +105ꢀC).
FUNCTIONAL BLOCK DIAGRAM
V
CP5
X
HIGH VOLTAGE
GENERATION
P
DD
ADXRS450
LDO
REGULATOR
DV
AV
DD
DD
HV DRIVE
CLOCK
ALU
PHASE
LOCKED
LOOP
DIVIDER
DECIMATION
FILTER
AMPLITUDE
DETECT
MOSI
MISO
SCLK
CS
TEMPERATURE
CALIBRATION
BAND-PASS
FILTER
SPI
INTERFACE
DEMOD
ADC 12
FAULT
DETECTION
Q FILTER
Q DAQ
P DAQ
Z-AXIS ANGULAR
RATE SENSOR
DV
SS
SS
ST
CONTROL
P
SS
AV
EEPROM
Figure 1.
Rev. PrA
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