SDC-632-A-L-1-R [ETC]
Synchro-to-Digital Converter ; 同步到数字转换器\n
| 型号： | SDC-632-A-L-1-R |
| 厂家： | 
ETC |
| 描述： | Synchro-to-Digital Converter
|
| 文件： | 总4页 (文件大小：465K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
S DC-6 3 0 /6 3 2 /6 3 4 * A/S T
1 0 -, 1 2 -, OR 1 4 -BIT S YNCHRO-TO-DIGITAL/
RES OLVER-TO-DIGITAL CONVERTER
LOWER COST! PIN-FOR-PIN REPLACEMENT FOR
SDC-630/632/634 SERIES. FOR ALL NEW DESIGNS!
FEATURES
DESCRIPTION
APPLICATIONS
Low Cost Pin-for-Pin
•
The SDC-630/632/634 A/ST series These converters may be used wher-
are low cost, low profile synchro-to- ever analog angle data from a syn-
digital (S/D) and resolver-to-digital chro or resolver must be rapidly and
(R/D) tracking converters with stan- accurately converted to digital form
dard pin configurations. They use a for transmission, storage or analysis.
unique control transformer algorithm Because these units are extremely
that provides inherently higher accu- rugged and stable, and meet the
racy and jitter-free output. Utilizing a requirements on MIL-STD-202E, they
type II servo loop, these converters are suitable for the most severe
have no velocity lag up to the speci- industrial, commercial and military
fied tracking rate, and output data is applications. Military ground support
always fresh and continuously avail- and avionics uses include ordnance
able. Each unit is fully trimmed and control, radar tracking systems, navi-
requires no adjustment or field cali- gation and collision avoidance sys-
Replacement
for SDC-630/632/634 Series
Industry Standard Low Profile
Modular Converters
•
•
Accuracy:
10 Bit: 21 Minutes
12 Bit: 8.5 Minutes
14 Bit: 4 Minutes, 0.9 LSB or
2.6 Minutes (High Accuracy)
bration.
tems.
Options (Consult Factory):
Velocity Input
•
BIT: Built-In-Test
16-Bit Resolution
INPUT OPTIONS
RESISTOR (ST)
DIVIDER
SYNCHRO INPUT OPTION (A)
S1
S2
S3
θ
SIN
SCOTT-T
VEL
TRANSFORMER
θ
COS
VELOCITY
ERROR
PROCESSOR
AND
REFERENCE (A)
ISOLATION
RH
RL
(OPTIONAL)
INH
INHIBIT
REF
DEMODULATOR
)
− φ
(θ
SIN
VOLTAGE
TRANSFORMER
RESOLVER INPUT OPTION (A)
CONTROLLED
OSCILLATOR
CB
S1
S2
S3
S4
CONVERTER
BUSY
RESOLVER
ISOLATION
TRANSFORMER
θ
SIN
− φ)
(θ
COS
ω t
SIN
θ
COS
θ
SIN
INPUT
OPTION
SYNCHRO INPUT OPTION (ST)
SOLID STATE
CONTROL
θ
COS
UP-DOWN COUNTER
(CONTAINS ANGLE φ
SOLID STATE
SCOTT-T
BUFFER
θ
S1
S2
S3
SIN
TRANSFORMER
(CT)
)
θ
COS
RESOLVER INPUT OPTION (ST)
BIT
1
S1
S2
S3
S4
SOLID STATE
RESOLVER
BUFFER
θ
SIN
θ
COS
BIT 10,
12 OR 14
BIT
1
BIT 10, 12, OR 14
(LSB)
(MSB)
FIGURE 1. SDC-630/632/634 A/ST BLOCK DIAGRAM
* Patented
1993, 1999 Data Device Corporation
©
TABLE 1. SDC-630/632/634 A/ST SPECIFICATIONS
TABLE 1. SDC-630/632/634 A/ST SPECIFICATIONS (CONTD)
PARAMETER
VALUE
PARAMETER
VALUE
SDC-632
12 bits
POWER SUPPLIES
+15 V Supply
+ 5 V Supply
-15 V Supply
SDC-630
10 bits
SDC-634
Nominal Voltage
Range
Maximum Voltage
Without Damage
Current (All)
RESOLUTION
14 bits
3
+11 to +16.5 V -11 to -16.5 V +4.5 to +5.5
V
ACCURACY
Standard Units
High Accuracy Option
±21 min
–
±8.5 min
–
±5.3 min
±2.6 min
+18 V
20 mA
-18 V
25 mA
+7
10 mA
SIGNAL AND
REFERENCE INPUT
Signal
Frequency
Range
Signal Input
Impedance
(L-L Balanced, Resistive)
TEMPERATURE
RANGES
Operating
-1 Option
-3 Option
Storage
A*
ST
-55°C to +105°C
0°C to +70°C
-55°C to +125°C
Synchro Input
90V L-L, 400 Hz
(Option H)
148 kΩ min
148 kΩ min
19 kΩ min
123 k
123 k
52 k
350-1000 Hz
47-1000 Hz
350-1000 Hz
90V L-L, 60 Hz
(Option I)
11.8V L-L, 400 Hz
(Option L)
PHYSICAL
CHARACTERISTICS
Size (Encapsulated
Module)
Resolver Input
90V L-L, 400 Hz
(Option H)
3.125 x 2.625 x 0.43 inches
(7.94 x 6.67 x 1.07 cm).
--
--
148 kΩ min
42 kΩ min
19 kΩ min
350-1000 Hz
350-1000 Hz
350-1000 Hz
26V L-L, 60 Hz
(Option M)
11.8V L-L, 400 Hz
(Option L)
Weight
4 oz.
(113 gm.)
70 k
NOTE: These specifications apply over temperature range, power
supply range, reference frequency and amplitude range, ±10%
signal amplitude variation, and up to 10% harmonic distortion in
reference input.
REFERENCE INPUT
Reference
Voltage
Range
Reference Input Impedance
(Resistive)
Options H, I
Options M, L
40-150 Vrms 300 kΩ min
10- 50 Vrms 80 kΩ min
270 k
60 k
POWER SUPPLIES
The main power supplies can vary over the specified ranges with
no change in converter specifications, except for a proportional
change in maximum tracking rates.
* Transformer Isolated. Other voltages and frequencies available on
special order.
DIGITAL
INPUT/OUTPUTS
Logic Type
Inhibit Input (INH)
When testing or evaluating the converters, it is advisable to limit
the current in each of the supplies. Set each current limit 50%
greater than the maximum current listed for that supply as listed
in TABLE 1.
TTL/CMOS Compatible
Logic “0” inhibits
Does not interrupt converter tracking.
Outputs
Type
10, 12, 14, (For 16
Consult Factory)
TTL/CMOS
TIMING
FIGURE 2 shows the converter timing waveforms. Whenever an
input angle change occurs, the converter changes the digital
angle in 1 LSB steps, and generates a Converter Busy (CB)
pulse. The CB is a positive pulse 0.5 to 1.5 µsec long.
Parallel Data Bits Natural Binary Angle; Positive logic
Converter Busy (CB) 0.5 to 1.5 µsec positive pulse.
Data changes on leading edge.
Drive Capability
Built-In-Test (BIT)
(Special Order,
Consult Factory)
1 Std. TTL load
6.1 µs MIN
DEPENDS ON dθ
dt
"1"
"0"
CONVERTER
BUSY (CB)
VELOCITY OUTPUT
(SPECIAL ORDER)
Polarity
0.5-1.5 µs
Positive Output for increasing angle
"1"
"0"
INHIBIT
(INH)
.5 µs
Std. Voltage Range
(Full Scale)
±4 Min (Other ranges available; Consult
Factory)
DATA
VALID
DATA
VALID
For other Velocity
Characteristics
Consult Factory
FIGURE 2. SDC-630/632/634* A/ST TIMING DIAGRAM
2
TABLE 2. SDC-630/632/634 A/ST DYNAMIC CHARACTERISTICS
60 HZ
400 HZ
Bandwidth (non F carrier)
UNITS
47 - 1,000
15
1,100
0.1
7,600
33
16.3
360 - 1,000 (ST to 5,000)
Hz
Hz
1/s
1/s
1/s
1/s
1/s
Carrier Frequency Range
Bandwidth (Closed Loop)
Ka
A1
A2
A
100
48,000
1
48,000
220
110
B
RESOLUTION
10
12
14
16
10
12
14
16
UNITS
Tracking Rate (rps)
Typical
Minimum
Acceleration (1 LSB lag)
Settling Time (179° step, max)
28.5
24
370
500
7.1
6
93
600
1.8
1.5
23
0.45
0.37
5.8
192
160
17,000
90
48
40
4,220
100
12
10
1,050
140
3
rps
rps
°/s
2.5
260
320
2
900
2,200
msec
The ABSOLUTE value of the resistor is not critical.
Data changes on the leading edge of the CB pulse, and data can
be transferred 0.5 µsec after the leading edge.
In the case of the RESOLVER version (RDC), the equation is:
RSIG = 2.2k (New L-L Voltage – Standard Unit L-L Voltage)
The simplest method of interfacing with a computer is to transfer
data at a fixed time interval after the Inhibit is applied. The con-
verter will ignore an Inhibit during the “busy” interval until that
interval is over. Timing is as follows: (a) apply the Inhibit, (b) wait
0.5 µsec, (c) transfer the data, (d) release the Inhibit. The Inhibit
line has no effect on converter tracking.
The calculated resistors are connected in series with S1 and S2
respectively. Note only two resistors are required. The required
resistance matching and its effect on accuracy, is the same as for
a synchro input, see FIGURE 3. The Reference Voltage is treat-
ed in the same manner, but the value is not critical.
SIGNAL INPUTS
R
REF = 2.8k (New Reference – Standard Reference)
To prevent damage to the inputs, the maximum steady-state volt-
age should not exceed the specified input voltage by more than
30%.
For this use a 10% tolerance resistor is adequate.
ACCOMMODATING NON-STANDARD INPUT
VOLTAGES (A ONLY)
The signal and reference input levels can be resistively scaled to
accommodate non-standard voltages, see FIGURE 3. Select a
converter that is the next lower standard voltage, and the voltage
is then scaled up by using resistors in series with the synchro
and/or reference inputs.
R
R
R
SIG
SIG
S1
S2
S3
NONSTANDARD
LINE-TO-LINE
LEVEL
For a synchro input (SDC), a resistor RSIG is added in series
with S1, S2 and S3 which is determined as follows:
{
SIG
RSIG = 1.1k (New L-L Voltage – Standard Unit L-L Voltage)
SDC-630A
R
REF
That is, 1.1k for each volt above the design voltage level of the
standard unit.
NONSTANDARD
REFERENCE
LEVEL
{
Example: An SDC-634A-L (11.8 V) is to be used at 50 V L-L.
RSIG = 1.1k (50 – 11.8) = 42.2k
The closest available high grade resistor with a low temperature
coefficient of resistance should be used, and the three resistors
should be as closely matched to each other as possible. In gen-
eral, a 0.1% difference will introduce 1.7 arc minutes of addition-
al error due to the effect on SIN/COS ratio relationship.
FIGURE 3. SDC-630/632/634 A/ST NON-STANDARD
INPUT LEVEL SCALING
3
ORDERING INFORMATION
XXX-XXX-X-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
Dimensions are in inches (mm).
+
2.625 0.015
-
(66.68)
0.040 + 0.002
-
(1.02)
VEL
Dia (Typ)
14 LSB
+
13
12
11
10
9
S4
S3
S2
S1
CB
Signal Input Voltage and Frequency:
H = 90 VL-L, 400 Hz (Synchro or
Resolver)
SDC-630A/ST
or
+
8
0.015
3.125
-
0.430
(10.92)
(Max)
SDC-632A/ST
or
(79.38)
INH
+15V
GND
-15V
+5V
RL
7
6
5
4
3
2
1
I = 90 VL-L, 60 Hz (Synchro Only)
L = 11.8 VL-L, 400 Hz (Synchro or
Resolver)
SDC-634A/ST
0.26 +
-
(6.604)
0.01
Transformer Type:
A = Internal Transformer
ST = Solid State
RH
MSB
0.20 +
0.01
(Typ)
(Tol Noncum)
-
(5.08)
Resolution:
2.2 +
0.25
(6.35)
(Min)
0.01
(55.88)
-
0.21+0.01
-
(5.334)
636 = 16 bits, Consult Factory
634 = 14 bits
632 = 12 bits
630 = 10 bits
SIDE VIEW
BOTTOM VIEW
Note: VEL is not present on the standard product.
For VEL output contact factory.
Input Type:
SDC = Synchro
RDC = Resolver
Note: For versions with Velocity or Built-In-Test, Please
Consult Factory.
FIGURE 4. SDC-630/632/634 A/ST
MECHANICAL OUTLINE
The information 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
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Asia/Pacific - Tel: +81-(0)3-3814-7688, Fax: +81-(0)3-3814-7689
World Wide Web - http://www.ddc-web.com
ILC DATA DEVICE CORPORATION
REGISTERED TO ISO 9001
FILE NO. A5976
D-08/99-500
PRINTED IN THE U.S.A.
4
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