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PDF ARX4808-2 Data sheet ( Hoja de datos )
| Número de pieza | ARX4808-2 | |
| Descripción | VARX4808 Dual Transceivers for MACAIR A3818/ A5690/ A5232/ A4905 & MIL-STD-1553 | |
| Fabricantes | Aeroflex Circuit Technology | |
| Logotipo |  |
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ARX4808 Dual Transceivers for
MACAIR A3818, A5690, A5232, A4905
& MIL-STD-1553
Features
• ARX4808 Dual Transceiver meets
MIL-STD-1553A & B, Macair A3818, A5690, A5232
and A4905 specs
• Operates with ±12 V to ±15 V & +5 V Power Supplies
• Voltage source output for higher bus drive power
• Plug-in or Flat Package
• Monolithic construction using linear ASICs
• Low receiver data level version, ARX4868
• Processed and Screened to MIL-STD-883 specs
• DESC SMD (Standard Military Drawing ) Pending
ARX4808 Transceiver
TX DATA IN
TX DATA IN
TX INHIBIT
DRIVER
SHAPING
OUTPUT
STAGE
V+
TX DATA OUT
TX DATA OUT
COMP.
RX DATA OUT
+5 V
VEE
RX DATA IN
RX DATA IN
VCC
STROBE
INPUT
AMP
V-
ACTIVE
FILTER
COMP.
RX DATA OUT
Block Diagram (without Transformer), 1/2 of unit shown
CIRCUIT TECHNOLOGY
www.aeroflex.com/act1.htm
General Description:
The Aeroflex Laboratories transceiver
model ARX4808 is a new generation
Dual monolithic transceiver which
provides full compliance with Macair
and MIL-STD-1553 data bus
requirements
The model ARX4808 performs the
front-end analog function of inputting
and outputting data through a
transformer to a MIL-STD-1553 or
Macair data bus. The ARX4808 can
be considered a "Universal"
Transceiver in that it is compatible
with MIL-STD-1553A & B, Macair
A-3818, A-4905, A-5232 and A-5690.
Design of this transceiver reflects
particular attention to active filter
performance. This results in low bit
and word error rate with superior
waveform purity and minimal zero
crossover distortion. The ARX4808
series active filter design has
additional high frequency roll-off to
provide the required Macair low
harmonic distortion waveform
without increasing the pulse delay
characteristics significantly.
Efficient transmitter electrical and
thermal design provides low internal
power dissipation and heat rise at
high and well as low duty cycles.The
receiver input threshold is set
Internally.
Transmitter
The Transmitter section accepts
bi-phase TTL data at the input and
when coupled to the data bus with a
1:1 transformer, isolated on the data
bus side with two 52.5 Ohm fault
isolation resistors, and loaded by two
70 Ohm terminations plus additional
eroflex Circuit Technology – Data Bus Modules For The Future © SCD4808 REV A 3/9/98
1 page  
Figure 3 Transmitter (TX) Output Wave form
Figure 4 Transmitter (TX) Output offset
LAST BIT
tf*
90%
Magnified View
6.5V P-P MIN
8.5V P-P MAX
0 Volts
0 Volts
*OUTPUT OFFSET
*OUTPUT OFFSET
10%
2.5 µsec
tr*
* Rise and fall times measured at point A-A’ in Fig 5
*Offset measured at point A-A’ in Fig 5
Figure 5 Typical Transformer connection
70Ω 70Ω
Figure 6 Power Dissipation vs. Duty Cycle
(Per Channel)
TX DATA OUT
TX DATA OUT
RX DATA IN
RX DATA IN
N1:N2 52.5Ω
BA
Ctr
tap
B’ A’
N1:N3 for
stub
coupling
52.5Ω
Transformer turns ratios:
N1:N2 = 1:1
N1:N3 = 1:0.71
Use Aeroflex 25T1553-1
4.0
3.5
3.0
2.5
(TYPICAL)
2.0
1.5
1.0
0.5
0
0 10 20 30 40 50 60 70 80 90 100
DUTY CYCLE, PERCENT
NOTES
1. Characteristics guaranteed by design, not production tested.
2. Measured from 75kHz to 1MHz at point A-A’ with transformer self impedance of 3KΩ minimum, power on or off
Model No.
ARX4808
ARX4808-2
ARX4868
ARX4868-2
Configurations and Ordering Information
DESC No.
TBA
TBA
TBA
TBA
Receiver Data level
Normally High
Normally High
Normally Low
Normally Low
Case
Plug In
Flat Pack
Plug In
Flat Pack
Aeroflex Circuit Technology
5 SCD4808 REV A 3/9/98 Plainview NY (516) 694-6700
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet ARX4808-2.PDF ] | |
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