SBCD1757_15 Datasheet, PDF (4/4 Pages) Analog Devices – BCD OUTPUT SYNCHRO TO DIGITAL CONVERTERS

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SBCD SERIES
CONVERTER
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Converters should be ordered by the appropriate part number
(i.e., SBCDI752, SBCDI75 3, SBCD1756 or SBCDI757) fol-
lowed by the appropriate option code.
If the unit is to be a Resolver-to-Digital converter, the SBCD
should be replaced by RBCD in the part number.
Note: In the case of R J , R2' and R3, the ratio error between
The XYZ options are as follows:
the resistances is more critical than the absolute value. In
general a 1% ratio error will give rise to an extra inaccuracy of
X signifies the operating temperature range thus;
X = 5 0 to +70°C (Commercial Temp.)
0.28 Degrees, while a ratio accuracy of 0.1 % will give rise to
X =6 -55°C to +105°C (Extended Temp.)
an extra inaccuracy of 0.028 Degrees. The absolute value of
RF is not critical.
CARD MOUNTING
Y signifies the reference frequency thus;
Y = 1 signifies 400Hz
Y = 2 signifies 60Hz*
All the converters can be mounted on an AC1755 mounting
Y =4 signifies 2.6kHz
card. This card contains the latches and monostable, described
under the "DATA TRANSfER" heading, which are necessary
Z signifies the input signal and reference voltages and whether
the converter is a Synchro-to-Digital or a Resolver-to-Digital
to transfer the data on to a computer bus system, as well as
sockets for the converter. The latches have a tri-state output
to facilitate ease of use. The AC1755 also contains facilities
converter. The options for Z are:
= Z 1 signifies Synchro, signal 11.8 Volts
.
reference 26 Volts
for the inclusion of input signal scaling and reference resistors
as described under the heading "RESISTIVE SCALING OF
INPUTS". The card uses a 22/22 0.156" pitch edge connector.
The pin-out is shown below. If it is not required to use the
external latches, they can be jumpered on the board.
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BS_T ¹ _BOTTOM,I---,
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19.251
c:~ C1 =.1 c:::::
A
LE _{t1--J.57 190 1}
0.15
tJ.B"
T ^{AC1755 Mounting Card (First Angle Projection).}
E ^{Dimensions Shown in Inches and (mm).}
Z = 2 signifies Synchro,
Z = 8 signifies Resolver,
signal 90 Volts
reference 115 Volts
signal 11.8 Volts
reference 26 Volts
Thus an SBCD1753 with a commercial (0 to +70°C) operating
range, using a 400Hz, 26 volt reference with an 11.8 volt
signal would be ordered as an SBCD17535f1.
*For 50Hz operation, a 60Hz convener can be used with no reduction
inaccuracy.
In addition a 400Hz unit will work with a 2.6kHz reference and a 60Hz
unit will work with a 400Hz reference; however they will have the
velocity and acceleration characteristics of the lower frequency rated
unit.
OTHER PRODUCTS
The SBCD series of Synchro-to-Digital converters are just a few
of the modules and instruments concerned with Synchro con-
version manufactured by us. Some of our other products are
listed below and technical data is available. If you have any
Edge Pin
Number
1
2
3
4
5
6
Funcrion
R (Lo)
R (Hi)
S3
S2
SI
S4
13
BUSY
15
INHIBIT
16
0.1
17
0.2
Edge-Pin
Letter
A
F
H
J
K
L
M
N
P
T
U
Function
Tri-State Enable
+15 Volts
+15 Volts
-15 Volts (3)
-15 Volts (3)
GND
GND
+5 Volts
+5 Volts
8
10
questions about our products or require advice about the use
of them for a particular application, please contact our
Applications Engineering Department.
SYNCHRO-TO-DIGIT AL CONVERTERS
The SDC1700 is a low profile (0.4") converter with a 12-bit
natural binary output. Its overall accuracy is :t8.5 arc-minutes,
and the module contains internal transformers for all reference
frequency options including 60Hz. The SDCI702 is similar to
the SDC1700 but has a to-bit natural binary output and an
overall accuracy of :t22 arc-minutes.
The SDC1704 is similar to the above two converters, but has a
14-bit natural binary output and an overall accuracy of :t2.0
arc-minutes :tILSB.
18
0.4
19
0.8
20
1
21
2
22
4
V
20
TWO SPEED PROCESSORS
W
40
X
80
The TSL1612 and the TSL1729 both produce one digital out-
Y
Z
100
200 (1) SIGN (2)
put word up to 20 ~its in length from the outputs of 2 Synchro-
to-Digital converters in a coarse/fine system. The TSL1612 is
used for ratios of 9: 1, 18: 1 and 36: I, while the TSLI729 is
programmable for all ratios from 1: 1 to 63: 1.
NOTES
(1) SBCD1753 and SBCDl757 only
(2) SBCD1752 and SBCD1756 only
(3) SBCD1752 and SBCD1753 only
AC1755 Mounting Card Edge Connections
VOL. /I, 13-44 SYNCHRO & RESOL VER CONVERTERS
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