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AD2S44 반도체 회로 부품 판매점

Dual Channel Synchro/Resolver-to-Digital Converter



Analog Devices 로고
Analog Devices
AD2S44 데이터시트, 핀배열, 회로
Data Sheet
Low Cost, 14-Bit, Dual Channel
Synchro/Resolver-to-Digital Converter
AD2S44
FEATURES
Low per-channel cost
32-lead DIL hybrid package
2.6 arc minute accuracy
14-bit resolution
Built-in test
Independent reference inputs
High tracking rate
APPLICATIONS
Gimbal/gyro control systems
Robotics
Engine controllers
Coordinate conversion
Military servo control systems
Fire control systems
Avionic systems
Antenna monitoring
CNC machine tooling
The core of each conversion is performed by state-of-the-art mono-
lithic, integrated circuits manufactured by the Analog Devices, Inc.,
proprietary BiMOS II process, which combines the advantages of
low power CMOS digital logic with bipolar linear circuits. The
use of these ICs keeps the internal component count low and
ensures high reliability.
The built-in test (BIT) facility can be used in failsafe systems to
provide an indication of whether the converter is tracking
accurately.
Each channel incorporates a high accuracy differential condi-
tioning circuit for signal inputs providing more than 74 dB of
common-mode rejection. Options are available for both synchro
and resolver format inputs. The converter output is via a three-state
transparent latch allowing data to be read without interruption
of the converter operation. The A/B and OE control lines select
the channel and present the digital position to the common
data outputs.
GENERAL DESCRIPTION
The AD2S44 is a 14-bit dual channel, continuous tracking synchro/
resolver-to-digital converter. It has been designed specifically
for applications where space, weight, and cost are at a premium.
Each 32-lead hybrid device contains two independent Type II servo
loop tracking converters. The ratiometric conversion technique
employed provides excellent noise immunity and tolerance of
long lead lengths.
The AD2S44 also features independent reference inputs where
different reference frequencies can be used for each channel.
All components are 100% tested at −55°C, +25°C, and +125°C.
Devices are processed to high reliability screening standards
and receive further levels of testing and screening to ensure
high levels of reliability.
FUNCTIONAL BLOCK DIAGRAM
RHI (A)
RLO (A)
S1 (A)
S2 (A)
S3 (A)
S4 (A)
S1 (B)
S2 (B)
S3 (B)
S4 (B)
RHI (B)
RLO (B)
REFERENCE
CONDITIONER
SYNCHRO/
RESOLVER
CONDITIONER
HIGH
SPEED
SIN/COS
MULTIPLIER
AD2S44
ERROR
AMP
PHASE-
SENSITIVE
DETECTOR
BUILT-IN
TEST
DETECTION
INTEGRATOR
SYNCHRO/
RESOLVER
CONDITIONER
REFERENCE
CONDITIONER
HIGH
SPEED
SIN/COS
MULTIPLIER
ERROR
AMP
PHASE-
SENSITIVE
DETECTOR
INTEGRATOR
Figure 1.
VCO
VCO
UP-DOWN
COUNTER
THREE-
STATE
OUTPUT
LATCHES
UP-DOWN
COUNTER
+VS
GND
–VS
BIT
A/B
OE
DB1 (MSB)
TO
DB14 (LSB)
Rev. B
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or 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
www.analog.com
Fax: 781.461.3113 ©1989–2011 Analog Devices, Inc. All rights reserved.


AD2S44 데이터시트, 핀배열, 회로
AD2S44* Product Page Quick Links
Last Content Update: 11/01/2016
Comparable Parts
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Documentation
Application Notes
• AN-214: Ground Rules for High Speed Circuits
• AN-263: Resolver to Digital Conversion; Simple
Alternative to Optical Shaft Encoders
• AN-264: Dynamic Characteristics of Tracking Converter
Data Sheet
• AD2S44: Low Cost, 14-Bit, Dual Channel Synchro/
Resolver-to-Digital Converter Data Sheet
Reference Materials
Technical Articles
• DSP Motor Control in Domestic Appliance Applications
• Single Chip DSP Motor Control Systems Catching on in
Home Appliances
Design Resources
• AD2S44 Material Declaration
• PCN-PDN Information
• Quality And Reliability
• Symbols and Footprints
Discussions
View all AD2S44 EngineerZone Discussions
Sample and Buy
Visit the product page to see pricing options
Technical Support
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number
* This page was dynamically generated by Analog Devices, Inc. and inserted into this data sheet. Note: Dynamic changes to
the content on this page does not constitute a change to the revision number of the product data sheet. This content may be
frequently modified.




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Dual Channel Synchro/Resolver-to-Digital Converter - Analog Devices