SDC-630/632/634*
10-, 12-, 14-BIT SYNCHRO-TO-DIGITAL
OR RESOLVER-TO-DIGITAL CONVERTER
See Lower Cost
SDC-630/632/634 A/ST
FEATURES
•
Standard Low Profile Converters
DESCRIPTION
The SDC-630/632/634 series are low
cost, low profile synchro-to-digital
(S/D) and resolver-to-digital (R/D)
tracking converters with standard pin
configurations. They use a unique
control transformer algorithm that pro-
vides inherently higher accuracy and
jitter-free output. Utilizing a type II
servo loop, these converters have no
velocity lag up to the specified track-
ing rate, and output data is always
fresh and continuously available.
Each unit is fully trimmed and
requires no adjustment or field cali-
bration.
APPLICATIONS
These converters may be used wher-
ever analog angle data from a syn-
chro or resolver must be rapidly and
accurately converted to digital form
for transmission, storage or analysis.
Because these units are extremely
rugged and stable, and meet the
requirements on MIL-STD-202E, they
are suitable for the most severe
industrial, commercial and military
applications. Military ground support
and avionics uses include ordnance
control, radar tracking systems, navi-
gation and collision avoidance sys-
tems.
with Optional Velocity Output
•
Signal and Ref Input:
- Internal Transformer Isolation
- All Common L-L Levels and
Frequencies
•
Accuracy:
10 Bit: 21 Minutes
12 Bit: 8.5 Minutes
14 Bit: 4 Minutes, 0.9 LSB or
2.6 Minutes (High Accuracy)
•
Logic:
- TTL Compatible
- Parallel Binary Angle Output
•
Power Required:
±15 VDC and +5 VDC
INPUT OPTIONS
SYNCHRO INPUT OPTION (A)
RESISTOR (ST)
DIVIDER
S1
S2
S3
SCOTT-T
TRANSFORMER
SIN
Θ
COS
Θ
RH
RL
RESOLVER INPUT OPTION (A)
S1
S2
S3
S4
REFERENCE (A)
ISOLATION
TRANSFORMER
REF
DEMODULATOR
SIN
(Θ −φ)
RESOLVER
ISOLATION
TRANSFORMER
SIN
Θ
COS
Θ
SIN
Θ
SIN
(Θ −φ)
COS
ω
t
ERROR
PROCESSOR
AND
VOLTAGE
CONTROLLED
OSCILLATOR
VEL
VELOCITY
(OPTIONAL)
INH
INHIBIT
CB
CB
CONVERTER
CONVERTER
BUSY
BUSY
SYNCHRO INPUT OPTION (ST)
INPUT
OPTION
SIN
Θ
COS
Θ
COS
Θ
S1
S2
S3
SOLID STATE
SCOTT-T
BUFFER
SOLID STATE
CONTROL
TRANSFORMER
(CT)
UP-DOWN COUNTER
(CONTAINS ANGLE
φ
)
RESOLVER INPUT OPTION (ST)
S1
S2
S3
S4
BIT 1
SIN
Θ
COS
Θ
BIT 10,
12 OR 14
SOLID STATE
RESOLVER
BUFFER
BIT 1
(MSB)
BIT 10,12, OR 14
(LSB)
SDC-630/632/634 BLOCK DIAGRAM
*Patented
Dimensions in inches (mm).
+
0.015
2.625
-
(66.68)
14 LSB
13
12
11
10
9
8
7
6
+
0.040
-
(1.02)
VEL
+
S4
S3
+
0.002
Dia (Typ)
3.125
-
(79.38)
+
0.015
0.26
-
0.01
(6.604)
5
4
3
2
1 MSB
SDC-630
or
SDC-632
or
SDC-634
S2
S1
CB
INH
+15V
GND
-15V
+5V
RL
RH
0.430
(10.92)
(Max)
0.21
-
(5.334)
+
0.01
2.2
-
(55.88)
+
0.10
0.20
+
0.01
-
(5.08)
(Typ.)
(Tol. Noncum.)
0.25
(6.35)
(Min)
BOTTOM VIEW
SIDE VIEW
NOTES:
1. Pin material is electrosoldered brass per MIL-F-14072, M222.
2. Case material is glass filled Diallyl Phthalate per MIL-M-14, Type SDG-F.
3. Pins 13 and 14 are omitted for SDC-632, and pins 11, 12, 13, and 14 are omitted for SDC-630.
4. Velocity output pin VEL is present only if requested on special order.
5. Pin S4 is present on Resolver units, and omitted on Synchro units.
SDC-630/632/634 MECHANICAL OUTLINE
ORDERING INFORMATION
XXX-XXX-X-X-X-X
Reliability Grade:
R = Enhanced Reliability
Accuracy:
a = High Accuracy Version, ±2.6 Minutes (SDC-634 Only)
Temperature Range:
1 = -55°C to +105°C
3 = 0°C to + 70°C
Signal Input Voltage and Frequency:
H =. 90V, L-L, 400 Hz (Synchro or Resolver)
I =. 90V, L-L, 60 Hz (Synchro Only
M = 26V. L-L, 400 Hz (Resolver Only)
L =. 11.8V, L-L, 400 Hz (Synchro or Resolver)
Resolution:
634 = 14 bits
632 = 12 bits
630 = 10 bits
Input Type:
SDC = Synchro
RDC = Resolver
If a socket is required, order socket number 9010.
The information provided in this data sheet is believed to be accurate; however, no responsibility
is assumed by Data Device Corporation for its use, and no license or rights
are granted by implication or otherwise in connection therewith.
Specifications are subject to change without notice.
105 Wilbur Place, Bohemia, New York 11716-2482
For Technical Support - 1-800-DDC-5757 ext. 7389 or 7413
Headquarters -
Tel: (631) 567-5600 ext. 7389 or 7413, Fax: (631) 567-7358
Southeast -
Tel: (703) 450-7900, Fax: (703) 450-6610
West Coast -
Tel: (714) 895-9777, Fax: (714) 895-4988
Europe -
Tel: +44-(0)1635-811140, Fax: +44-(0)1635-32264
Asia/Pacific -
Tel: +81-(0)3-3814-7688, Fax: +81-(0)3-3814-7689
World Wide Web -
http://www.ddc-web.com
F-ABR
3
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