SDC1768_15 Datasheet, PDF (1/6 Pages) Analog Devices – 12 AND 14 BIT HYBRID SYNCHRO RESOLVER TO DIGITAL CONVERTERS

- ^{ANALOG DEVICES FAX-ON-DEMANDHOTLINE}
Page ~2
~ ANALOG
L.III DEVICES
12- and 14-BitHybridSynchro/
Resolve-rto- DigitalConverters
FEATURES
Internal Isolating Transformers
14-Bit or 12-Bit Resolution
Three Accuracy Options
Three-State Latched Output
Continuous Tracking-Even During Data Transfer
~^{~:>. ~.} _{Simple Data Transfer}
~ *Analog Velocity Output
~ ~ ^, _{*Error Output}
:~::.~~ _{Laser Trimmed-No External Adjustments}
iI _{MIL Spec/Hi Rei Options Available}
~ ^{, Hermetically Sealed}
APPLICATIONS
OAvionic Systems
Servo Mechanisms
B Coordinate Conversion
Axis Transformation
S _{Antenna Monitoring}
Artillery Fire Control Systems
O _{Engine Controllers}
L GENERAL DESCRIPTION
The SDC/RDC1767 and SDC/RDC1768 are hybrid, continuous
E _{tracking synchro- or resolver-to-digital converters which employ}
T ^{a type 2 servo loop and contain three-state latches on the digital}
E ^outputs.
~ _~:~;~?
.
... '~'_'<':.,~
'
. ." ~
'
'. ^....-^,q .~^".~~"^. .".".-^"""^"~
.
'-.~...~~ '<~
"'<_":,_''_>.._~~_'-~_-"'"~"~~_"Q_-. _-'""<-
~ ~/- ;' ~
'1 _{1~l-it. J.-.::,I-~1~l.i-tJ.}
'.
.
-..
-~ ^{.. .} ""'""'.cJ I' - "
...~
~~.//
MODELS AVAILABLE
The two synchro/resolver-to-digital converters described in this
data shcet differ primarily in the areas of resolution, accuracy
and dynamic performance as follows:
Model SDCl767XYZ is a 12-bit converter with an accuracy of
:i: 8.5 an; minutes and a resolution of 5.3 arc minutes, with the
addition of analog velocity oUlput--error output and increased
tracking rate, over our model SDC1742.
Model SDCl768XYZ is a 14-bit converter with an overall accuracy
The input signals can either be 3-wire synchro plus reference or
of :i: 5.3 arc minutes and a resolution of 1.3 arc minUtes with
4-wire resolver format plus reference depending on the option;
and the outputs are presented in TTL compatible parallel natural
binary buffered by three-state latches.
The thn:e-statt: output facility, which has separate ENABLE
the addition of analog velocity output--error
model SDC1740.
Both models have an operating temperature
+ 125°C.
output, over our
range of - 55°C [0
inpUts for the most significant 8 bits and the least significant 4
bits (or 6 bits in the case of the SDC/RDCI768), not only simplifies
multiplexing of more than one device onto a single data bus,
but also enables the INHIBIT to be used without opening the
internal converter loop.
The XYZ code defines the option as follows: (X) signifies the
operating temperature range, (Y) signifies the reference frequency,
(Z) signifies the signal and reference voltage and whether it will
accept synchro or resolver format.
An outstanding feature of these converters is that although the profile
height is only 0.28 inches (7.1mm) they contain internal transfonners
More information about the option codes is given under the
heading of "Ordering Information".
which provide for true isolation on the signal and reference inputs.
The converters are hermetically sealed in a metal 32-pin dual-in-line
package.
To ensure a high level of reliability each converter receives a
stringent pre-cap visual inspection, constant acceleration, final
electrical test, burn-in and gross leak test.
Devices that are processed in accordance with MIL-STD-883,
Method 5008, Class B, receive further levels of testing and
screening to ensure extremely high levels of reliability.
"Unique Fearure
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 which may result from its use. No license is granted by implica-
tion or otherwise under any patent or patent rights of Analog Devices.
P.O. Box 280; Norwood, Massachusetts 02062 U.S.A.
Tel: [phone]
Twx; 710/394-6577
Telex: 924491
Cables: ANALOG NORWOODMASS