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參數(shù)資料
| 型號： | BU-61582G6-110L |
| 廠商： | DATA DEVICE CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 2 CHANNEL(S), 1M bps, MIL-STD-1553 CONTROLLER, CDSO70 |
| 封裝： | CERAMIC, GULL LEAD, 70 PIN |
| 文件頁數(shù)： | 30/48頁 |
| 文件大?。?/td> | 378K |
| 代理商： | BU-61582G6-110L |
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36
Data Device Corporation
www.ddc-web.com
BU-61582
G-08/02-250
INTERFACE TO MIL-STD-1553 BUS
FIGURE 18 illustrates the interface from the various versions of
the SP'ACE series terminals to a 1553 bus. The figure also indi-
cates connections for both direct (short stub) and transformer
(long stub) coupling, plus the peak-to-peak voltage levels that
appear at various points (when transmitting).
TABLE 33 lists the characteristics of the required isolation trans-
formers for the various SP'ACE terminals, the DDC and Beta
Transformer Technology Corporation corresponding part num-
ber, and the MIL (DESC) drawing number (if applicable). Beta
Transformer Technology is a direct subsidiary of DDC.
For both coupling configurations, the isolation transformer is the
transformer that interfaces directly to the SP'ACE component.
For the transformer (long stub) coupling configuration, the trans-
former that interfaces the stub to the bus is the coupling trans-
former. The turns ratio of the isolation transformer varies,
depending upon the peak-to-peak output voltage of the specific
SP'ACE terminal.
The transmitter voltage of each model of the BU-61582 varies
directly as a function of the power supply voltage. The turns
ratios of the respective transformers will yield a secondary volt-
age of approximately 28 volts peak-to-peak on the outer taps
(used for direct coupling) and 20 volts peak-to-peak on the inner
taps (used for stub coupling).
In accordance with MIL-STD-1553B, the turns ratio of the cou-
pling transformer is 1.0 to 1.4. Both coupling configurations
require an isolation resistor to be in series with each leg con-
necting to the 1553 bus; this protects the bus against short cir-
cuit conditions in the transformers, stubs, or terminal compo-
nents.
Notes for TABLE 33 and FIGURE 18:
(1) Shown for one of two redundant buses that interface to the BU-
61582.
(2) Transmitted voltage level on 1553 bus is 6 Vp-p min, 7 Vp-p nomi-
nal, 9 Vp-p max.
(3) Required tolerance on isolation resistors is 2%. Instantaneous
power dissipation (when transmitting) is approximately 0.5 W (typ),
0.8 W (max).
(4) Transformer pin numbering is correct for the DDC (e.g., BUS-
25679) transformers. For the Beta transformers (e.g., B-2203) or
the QPL-21038-31 transformers (e.g., M21038/27-02), the winding
sense and turns ratio are mechanically the same, but with reversed
pin numbering; therefore, it is necessary to reverse pins 8 and 4 or
pins 7 and 5 for the Beta or QPL transformers (Note: DDC trans-
former part numbers begin with a BUS- prefix, while Beta trans-
former part numbers begin with a B- prefix).
(5) The B-2204, B-2388, and B-2344 transformers have a slightly differ-
ent turns ratio on the direct coupled taps then the turns ratio of the
BUS-29854 direct coupled taps. They do, however, have the same
transformer coupled ratio. For transformer coupled applications,
either transformer may be used. The transceiver in the BU-61582
was designed to work with a 1:0.83 ratio for direct coupled applica-
tions. For direct coupled applications, the 1.20:1 turns ration is rec-
ommended, but the 1.25:1 may be used. The 1.25:1 turns ratio will
result in a slightly lower transmitter amplitude. (Approximately 3.6%
lower) and a slight shift in the SP'ACE's receiver threshold.
TABLE 33. ISOLATION TRANSFORMER GUIDE
B-2388
M21038/27
-13,
B-2334,
M21038/27
-18
BUS-29854
1.20:1
SURFACE
MOUNT
B-2387
M21038/27
-12,
M21038/27
-17
LPB-5002
LPB-5009
LPB-6002
LPB-6009
LPB-5001
LPB-5008
LPB-6001
LPB-6008
RECOMMENDED XFORMER
PLUG-IN
BUS-25679,
B-2203,
M21038/27
-02
B-2204,
M21038/27
-03
XFORMER
COUPLED
2:1
1:0.6
1.25:1
(Note 5)
BU-61582X2
1.41:1
BU-61582X1
DIRECT
COUPLED
SP’ACE PART
NUMBER
TURNS RATIO
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