參數(shù)資料
型號(hào)： A42MX24-2TQ100
廠商： Electronic Theatre Controls, Inc.
英文描述： 40MX and 42MX FPGA Families
中文描述： 40MX和42MX FPGA系列
文件頁(yè)數(shù)： 39/93頁(yè)
文件大?。?/td> 854K
代理商： A42MX24-2TQ100
44
Data Device Corporation
www.ddc-web.com
BU-6474X/6484X/6486X
J-07/05-0
+3.3 VOLT INTERFACE TO MIL-STD-1553 BUS
The Mini-ACE Mark3 is the world's first MIL-STD-1553 terminal
powered entirely by 3.3 volts. Unique isolation transformer turns
ratios, single output winding transformers and new interconnec-
tion methods are required in order to meet mandated MIL-STD-
1553 differential voltage levels.
FIGURE 15 illustrates the two possible interface methods
between the Mini-ACE Mark3 series and a MIL-STD-1553 bus.
Connections for both direct (short stub, 1:3.75) and transformer
(long stub, 1:2.7) coupling, as well as nominal peak-to-peak volt-
age levels at various points (when transmitting), are indicated in
the diagram.
The new isolation transformers for the Mini-ACE Mark3 series
now contain only one set of output windings. Different isolation
transformers are now required for a direct or transformer cou-
pled, MIL-STD-1553 Bus implementation.
The center tap of the primary winding (the side of the transformer
that connects to the Mark3) must be directly connected to the
+3.3 volt plane. Additionally, a 10f, low inductance tantalum
capacitor and a 0.01f ceramic capacitor must be mounted as
close as possible and with the shortest leads to the center tap of
the transformer(s) and ground plane.
Additionally, during transmission large currents flow from the trans-
former center tap, through the primaries and the TX/RX pins, and
then out the transceiver grounds (pins 22 and 79) into the ground
plane. The traces in this path should be sized accordingly and the
connections to the ground plane should be as short as possible.
FIGURE 15. MINI-ACE MARK3 (+3.3 VOLT) INTERFACE TO MIL-STD-1553 BUS
Mini-ACE Mark3/
Micro-ACE-TE
DATA
BUS
Z
0
55
55
TX/RX
(1:3.75)
(7.4 Vpp)
28 Vpp
1 FT MAX
Z
0
(1:2.7)
20 Vpp
(1:1.41)
COUPLING
TRANSFORMER
0.75 Z
0
0.75 Z
0
LONG STUB
(TRANSFORMER
COUPLED)
20 FT MAX
28 Vpp
SHORT STUB
(DIRECT COUPLED)
OR
DIRECT-COUPLED
ISOLATION TRANSFORMER
BETA LVB-4103
7 Vpp
Mini-ACE Mark3/
Micro-ACE-TE
(7.4 Vpp)
10F
.01F
3.3V
10F
.01F
3.3V
TRANSFORMER-COUPLED
ISOLATION TRANSFORMER
BETA LVB-4203
NOTES: 1. Transformer center tap capacitors: use a 10F tantalum for low inductance, and a 0.01F ceramic.
Both must be mounted as close as possible, and with the shortest leads to the center tap of the
transformer(s) and ground.
2. Connect the Mark3 hybrid grounds as directly as possible to the 3.3V ground plane.
3. Zo = 70 to 85 Ohms.
TX/RX
+
相關(guān)PDF資料
PDF描述
A42MX24-2TQ100A 40MX and 42MX FPGA Families
A42MX24-2TQ100B 40MX and 42MX FPGA Families
A42MX24-2VQ100 40MX and 42MX FPGA Families
A42MX24-2VQ100A 40MX and 42MX FPGA Families
A42MX24-2VQ100B 40MX and 42MX FPGA Families
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