DRC1746_15 Datasheet, PDF (1/8 Pages) Analog Devices – HIGH POWER OUTPUT HYBRID DIGITAL TO SYNCHRO RESOLVER CONVERTERS

ANALOGDEVICES fAX-ON-DEMAND HOTLINE - Page 111
ANALOG
W DEVICES
HighPowerOutputH" ybrid
Digitalt-o-Synchro/ResolveCronverters
I
DRC1M~DRC1746I
FEATURES
FUNCTIONAL BLOCK DIAGRAM
14- or 16-Bit Resolution
,-,sv -1SV
+ 15VIP,
2 or 4 Arc-Minutes Accuracy
2VA max Mean Output Drive Capability
SIN SENSE
Full Accuracy for de to 2.6kHz Reference
Full Accuracy with dc or Pulsating Power
Supplies (PPS)
SIN
1M SIN ",t SIN "'
SIG GNP
Guaranteed Operation With 3V dc Pedestal on PPS
Can Drive Pure Inductive, Resistive or Highly
cDS SENSE
OBSOLETE Capacitive Loads
LS or CMOS Latched Inputs With Separate HighlLow
Byte Enable
Low Radius Vector Variation (0.03%)
Optional TransZorb TMProtection Against
Inductive Spikes on Output
Protected Against +200% Overvoitage on
Analog Input
Remote Output Sensing Facility
No Trims or External Adjustments
Full Output Short Circuit Protection
Single 4O-Pin Package
Hi Rei, MIL-STDB83BVersions Available
APPUCATIONS
Driving Synchro and Resolver Control Transformers
Avionic Equipment (e.g., Air Data Computers)
Interfacing With Servo Systems
Fire Control System Outputs
A_,
V"' A,o
fA SIN ,.Ii
,sv
IL OPTIONS
ONLYI
COS
{2A SIN ",t COS "'
NOTE,
LBE HBE
"'GITI"
INPUT
(to'
"A",", "GNO", AND "SIG GND"
IN STAR POINT.
GNO -15VIP!
ARE INTERNALLY cONNECTED
The useof pulsating power suppliesgreatly reduces the internal
power dissipation in the hybrid package which in tUrn maximizes
the converter's Mean Time BetWeenFailures (MTBF).
A particular feature of the converters is that they have a remote
sensing facility which means that output accuracy can be main-
tained even when long lines have to be driven.
Naval Retransmission Unit Outputs
Outputs to Radars and Navigational Aids
Aircraft and Naval Simulators
The converter's data inputs are latched and the latches can be
CMOS or Low Power Schottky (LS). The former gives advantages
in terms of power dissipation and the latter in terms of glitch
GENERAL DESCRIPTION
performance when used in fast dynamic update modes. The
The DRCl745 and DRC1746are hybrid packaged Digital-to-
latchesare transparent and have a separatehigh and low byte
Resolverconverters.They accept a 14-bit or 16-bitdigital input enable.
word representingangleand output sine and cosinevoltages
multipliedby an analoginput. The convertersmaintain full
accuracywhen the analog input frequencyis in the range dc to
2.6kHz.
The units have internal power amplifiers capable of driving a
2VA load which can be pure inductive, resistive or highly capaci-
tive. The output is fully short-circuit protected against overcurrenr.
The output of the converter can be used to drive directly into
resolver control tnmsformers or in conjunction with an external
As an option, the output stage can be fitted with internal Trans-
Zorb TMprotection. This gives full protection against transient
voltages generated by an inductive load in response to an abrupt
change in load current. This condition can occur at switch off
or as a consequence of external power supply fault conditions.
The units are packaged in 4O-pin dual in line hybrid packages
and require no external trims or adjustments.
MODELS AVAILABLE
transformer module to drive synchro control transformers. The
power available is more than adequate to drive aU standard
synchro control transformers.
The DRC1745 (14-bit resolution) and DRC1746 (l6-bit resolution)
are available with accuracies of :!:2 or :t 4 arc-minUtes. Both
units have optional TransZorb protection and a choice of either
The separately powered output stage is compatible with conven-
tional :t 15V dc power supplies or pulsating'power supplies with
pedestal components as low as 3V dc.
TrausZorb
lDduatries,
REV. A
ia a reJ:istercd trademark
Inc.
of General
Semicoadui:tOr
LS or CMOS inputs (see Ordering Information).
Two sets of reference and output transformers are available.
The STMl660/STM1663 operates over 47Hz to 440Hz while
the STM1680/STM1683 operates over 360Hz to 2.6kHz. The
transformers can be Scott T connected to provide a synchro
oUtput format.
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 implication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P,O, Box 9106, Norwood, MA 02062-9106. U.S.A.
Tel: [phone]
Fax: [phone]
Twx; 710/394-6577
Telex: 924491
Cable: ANALOG NORWOODMASS
~~