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PDF ACT4419FP Data sheet ( Hoja de datos )
| Número de pieza | ACT4419FP | |
| Descripción | Single Supply Variable Amplitude Transceivers for MIL-STD-1553 | |
| Fabricantes | Aeroflex Circuit Technology | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de ACT4419FP (archivo pdf) en la parte inferior de esta página. Total 6 Páginas | ||
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ACT4419
Single Supply Variable Amplitude Transceivers
for MIL-STD-1553
Features
Preliminary
• First fully monolithic 5V only Variable Amplitude
Transceiver
• Lowest standby power
• Transceiver meets military data bus requirements,
MIL-STD-1553 and MIL-STD-1760
• Low power dissipation at full output power
• Single +5V power supply
• Current source output
• Monolithic construction using dielectrically isolated(D.I.)
• Processed and screened to MIL-STD-883 specs
• Radiation Hard to 2.5 MRADS Total Dose
• DESC SMD pending
• Either 5V or 10V DC control line (Factory Set)
ACT4419FP & ACT4419 Plug In Transceivers
TX DATA IN
TX DATA IN
TX INHIBIT
+5 V
GROUND
STROBE
DRIVER
INPUT
AMP
SHAPING
REFERENCE
ACTIVE
FILTER
OUTPUT
STAGE
TX/RX
TX/RX
COMP.
RX DATA OUT
COMP.
RX DATA OUT
Block Diagram
CIRCUIT TECHNOLOGY
www.aeroflex.com
General Description
The Aeroflex Circuit Technology
model ACT4419 is a next generation
D.I. monolithic transceiver which
provides variable amplitude in full
compliance with MIL-STD-1553/1760
data bus requirements with the lowest
standby power consumption available
and one power supply operation.
The model ACT4419 performs the
front-end analog function of inputting
and outputting data through a
transformer to a MIL-STD-1553/1760
data bus.
Design of these transceivers 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. Efficient
transmitter electrical and thermal
design provides low internal power
dissipation and heat rise at high as
well as low duty cycles.
Variable amplitude is adjusted with
factory preset 0 - 10 Vdc or 0 - 5 Vdc
control line at 1mA maximum input
current.
Transmitter
The Transmitter section accepts
bi-phase TTL data at the input and
when coupled to the data bus with a
primary grounded center tap
1:2.5 transformer, isolated on the
data bus side with two 52.5 Ohm fault
isolation resistors, and loaded by two
70 Ohm terminations plus additional
receivers, the data bus signal
produced is 7.5Volts nominal P-P at
A-A’ (See Figure 5). When both DATA
and DATA inputs are held low or high,
the transmitter output becomes a
high impedance and is “removed”
from the line. In addition, an
eroflex Circuit Technology – Data Bus Modules For The Future © SCD4419 REV B 10/21/99
1 page  
Figure 3 – Transmitter (TX) Output Amplitude
vs Control Voltage
Figure 4 – Transmitter (TX) Output Offset
VP-P @ B–B'
7.5
6.75
6
Slope = 0.75 VP-P/Vdc for 10V
Slope = 1.5 VP-P/Vdc for 5V
5.25
4.5
Typical
3.75
0 volts
7.5
36
2.25 4.5
1.5 3
.75
0
01
234567
1.5
Vdc
8 9 10
CONTROL VOLTAGE
LAST BIT
Magnified View
OUTPUT OFFSET*
OUTPUT OFFSET*
2.5 µsec
*Offset measured at point A-A’ in Fig 5
Figure 5 – Typical Transformer Connection
70Ω 70Ω
ZO
TX DATA OUT
D.U.T
TX DATA OUT
RX DATA IN
RX DATA IN
1:2.5 55Ω
PB
A
Center
Tap
P’ B’
A’
55Ω
1:1.77 for
stub
coupling
Transformer
Use Technitrol 1553-45 or Equivalent
Figure 6 – Power Dissipation vs. Duty Cycle
1600
1400
1200
1000
Maximum
800
Typical
600
400
200
0
0 10 20 30 40 50 60 70 80 90 100
DUTY CYCLE – PERCENT
Note: Vcc = 5 Volts, Vbus (pt A-A') at 7.5 Volts P-P
Aeroflex Circuit Technology
5
SCD4419 REV B 10/21/99 Plainview NY (516) 694-6700
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet ACT4419FP.PDF ] | |
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