ADXRS645 Datasheet, PDF (1/10 Pages) Analog Devices – High Temperature, Vibration Rejecting plus,minus2000temperature/sec Gyroscope

Data Sheet
High Temperature, Vibration Rejecting
±2000°/sec Gyroscope
ADXRS645
FEATURES
Innovative ceramic vertical mount package can be oriented
for pitch or roll rate response
Wide temperature range: −40°C to +175°C
Long life: guaranteed 1000 hours at TA = 175°C
High vibration rejection over wide frequency
10,000 g powered shock survivability
Ratiometric to referenced supply
5 V single-supply operation
Self-test on digital command
Temperature sensor output
APPLICATIONS
Down hole measurements for geological exploration
Extreme high temperature industrial applications
Severe mechanical environments
GENERAL DESCRIPTION
The ADXRS645 is a high performance angular rate sensor
with excellent vibration immunity for use in high temperature
environments. The ADXRS645 is manufactured using the
Analog Devices, Inc., patented high volume BiMOS surface-
micromachining process with years of proven field reliability.
An advanced, differential, quad sensor design provides superior
acceleration and vibration rejection.
The output signal, RATEOUT, is a voltage proportional to the
angular rate about the axis normal to the package lid. The
measurement range is a minimum of ±2000°/sec, and may be
extended to ±5000°/sec with the addition of a single external
resistor. The output is ratiometric with respect to a provided
reference supply. Other external capacitors are required for
operation.
A temperature output is provided for compensation techniques.
Two digital self-test inputs electromechanically excite the sensor
to test proper operation of both the sensor and the signal
conditioning circuits. The ADXRS645 is available in a 8 mm ×
9 mm × 3 mm, 15-lead brazed lead tri in-line package.
FUNCTIONAL BLOCK DIAGRAM
5V
(ADC REF)
100nF
5V
AV_CC
100nF
AGND
DRIVE
AMP
ST2 ST1
SELF-TEST
MECHANICAL
SENSOR
TEMP V_RATIO
ADXRS645
25kΩ ^25kΩ
@ 25°C
DEMOD
AC
AMP
VGA
5V
V_DD
100nF
PGND
CHARGE PUMP
AND VOLTAGE
REGULATOR
180kΩ ±1%
CP1 CP2 CP3 CP4 CP5 SUMJ
RATEOUT
22nF
22nF
100nF
C_OUT
Figure 1.
Rev. A
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