ADXRS645 Datasheet PDF - Analog Devices
| Part Number | ADXRS645 | |
| Description | Gyroscope | |
| Manufacturers | Analog Devices | |
| Logo |  |
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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
AVCC
100nF
AGND
DRIVE
AMP
ST2 ST1
SELF-TEST
MECHANICAL
SENSOR
TEMP VRATIO
ADXRS645
25kΩ 25kΩ
@ 25°C
AC
AMP
VGA
DEMOD
5V
VDD
100nF
PGND
CHARGE PUMP
AND VOLTAGE
REGULATOR
180kΩ ±1%
CP1 CP2 CP3 CP4 CP5 SUMJ
RATEOUT
22nF
22nF
100nF
COUT
Figure 1.
Rev. A
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responsibilityisassumedbyAnalogDevices for itsuse,nor foranyinfringementsofpatentsor other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
©2014 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
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Data Sheet
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
ST1
3A
ST2 TEMP
BC
2A B C D E F
1A B C D E F
ADXRS645
TOP VIEW
(Not to Scale)
Figure 3. Pin Configuration (Top View)
ADXRS645
Table 3. Pin Function Descriptions
Pin Number
Mnemonic
A1 CP3
A2 CP5
A3 ST1
B1 CP4
B2 VDD
B3 ST2
C1 CP1
C2 PGND
C3 TEMP
D1 CP2
D2 RATEOUT
E1 AVCC
E2 SUMJ
F1 AGND
F2 VRATIO
Figure 4. Pin Configuration (3D View)
Description
Charge Pump Capacitor, 22 nF
HV Filter Capacitor, 100 nF
Positive Self-Test
Charge Pump Capacitor, 22 nF
Positive Charge Pump Supply
Negative Self-Test
Charge Pump Capacitor, 22 nF
Charge Pump Supply Return
Temperature Voltage Output
Charge Pump Capacitor, 22 nF
Rate Signal Output
Positive Analog Supply
Output Amplifier Summing Junction
Analog Supply Return
Reference Supply for Ratiometric Output
Rev. A | Page 5 of 10
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| Information | Total 10 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ ADXRS645.PDF Datasheet ] | |
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