High Performance,

Digital Output Gyroscope

ADXRS450

Rev. 0

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FEATURES

Complete rate gyroscope on a single chip

±300°/sec angular rate sensing

High vibration rejection over a wide frequency range

Excellent 25°/hour 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 5 V operation

−40

°C to +105°C operation

Ultrasmall, light, and RoHS compliant

Two package options

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

APPLICATIONS

Rotation sensing medical applications

Rotation sensing industrial and instrumentation

High performance platform stabilization

GENERAL DESCRIPTION

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.

The ADXRS450 uses 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.

The ADXRS450 is capable of sensing angular rate of up to

±300°/sec. Angular rate data is presented as a 16-bit word, as

part of a 32-bit SPI message.

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 (3.3 V to 5 V) and temperature range (−40°C to +105°C).

FUNCTIONAL BLOCK DIAGRAM

SPI

INTERFACE

MISO

MOSI

SCLK

CS

HIGH VOLTAGE

GENERATION

EEPROM

CP5

VX

LDO

REGULATOR

BAND-PASS

FILTER

FAULT

DETECTION

TEMPERATURE

CALIBRATION

DECIMATION

FILTER

ALU

PHASE-

LOCKED

LOOP

CLOCK

DIVIDER

DEMOD

Q FILTER

Q DAQ

P DAQ

HV DRIVE

ST

CONTROL

ADC 12

AMPLITUDE

DETECT

Z-AXIS ANGULAR

RATE SENSOR

ADXRS450

Figure 1.