AD2S46_15 Datasheet, PDF (1/8 Pages) Analog Devices – LOW COST 16 BIT SYNCHRO RESOLVER TO DIGITAL CONVERTER

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Page 12
-.. ANALOG
W DEVICES
LowCost,l6-Bit Synchro/
Resolve-tro-DigitaCl onverter
AD2S46
I
FEATURES
1.3 Arc Minute Accuracy
16-81t Resolution
Small 28-Pin Ceramic DIP
Low Cost
The device incorporates a high accuracy differential conditioning
circuit for signal inputs providing more than 74 dB of common-
mode rejection. Options are available for both synchro and re-
solver format inputs. The convener outpUt is via a tristate
transparent latch allmving data to be read without interruprion
APPLICATIONS
of converter operation.
Gimbal/Gyro Control Systems
Digital data transfer is accommodated by an ENABLE input
Radar System
which controls the tristate outpUts and presents the data to the
Engine Controllers
bus when taking from a HI to a LO statc.
OBSOLETE Sonar
Military Servo Control Systems
Fire Control Systems
Avionic Systems
Antenna Monitoring
CNC Machine Tooling
GENERAL DESCRIPTION
The AD2S46 series are 16-bit, continuous tracking synchrol
resolver-to-digital conveners. They have been designed specifi-
cally for applicarions where space and performance are al a pre-
mium. Each 28-pin hybrid device uses a Type 2 servo loop
tracking converter with a ratiometTic conversion technique to
provide excellent noise immunity, repeatability and tolerance of
long lead lengths.
The core of each conversion is performed by a state of the art
monolithic integrated circuit manufactured in Analog Devices'
proprietary BiMOS II process which combines the advantage of
An INHIBIT precedes the ENABLE inpUt and freezes the data
transfer from the up-down counter to the oUtput latches. This
action does not interrupt the operation of the tracking loop. Re-
leasing the HI/HIBIT aUtomatical1ygenerates a data refresh. A
BYTE SELECT input provides the facility for interfacing to an
8- or 16-bit bus system.
MODELS AVAILABLE
The AD2S46 series is available in 2 accuracy grades;
AD2S46TD 16 Bits:!: 1.3 arc mins -55°C to .t 125cC
AD2S46SD 16 Bits :t 2.6 arc mim - 55°C to T 125°C
Each grade has options available which wiIJ interface to standard
synchros and resolvers.
All components are 100% tested at -.- 55°C, + 25°C, and -+1-2SoC.
Devices processed to high reliability screening standards (Suftix
B) receive further levels of testing and screening to ensure high
levels of reliability. Full ordering information is given on the
low power CMOS digital logic with bipolar linear circuits. The
back page of this data sheet.
use of these ICs keeps the internal component count low provid-
ing both packaging which reflects LSI monolithic standards and
ensures high reliability.
FUNCTIONAL BLOCK DIAGRAM
RHO
Rla
REFERENCE
CONDITIONER
51
52
RESOLVERI
V1
53
SYNCHRO
V2
CONDITIONER
54
REF
AD2S46
PHASE
SENSITIVE
DETECTOR
INTEGRA TOR
-vs
+Vs
GND
BYTE
SELECT
ENAiiLE
UP/DOWN
COUNTER
Signature
HIGH
DYNAMIC
RANGE VCO
INHIBIT
REV. 0
DB1 TO DB16
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 Drother rights of third parties
which may result from its use. No license is granted by implication Dr
otherwise under any patent or patent rights of Analog Devices.
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