ACT4418 Ver la hoja de datos (PDF) - Aeroflex Corporation

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Fabricante

ACT4418

Molded Dual Variable Amplitude Transceivers for MACAIR A3818, A5690, A5232, A4905 & MIL-STD-1553

Aeroflex Corporation 

ACT4418 Molded Dual Variable Amplitude Transceivers

for MACAIR A3818, A5690, A5232, A4905

& MIL-STD-1553

Features

• ACT4418 Dual Transceivers meets

MIL-STD-1553A&B, Macair A3818,

A4905, A5232 and A5690 Specs

• ±12 Volt Power Supply Operation

• Voltage source output for higher bus

drive power

• Molded Plug-in package

• Monolithic construction using linear

ASICs

• Variable TX Amplitude

• Processed and Screened to Mil-STD-883

Specs for Industrial temperature range

TX DATA IN

TX DATA IN

TX INHIBIT

+5V

-12V

GROUND

RX DATA IN

RX DATA IN

+12V

STROBE

DRIVER

INPUT

AMP

One Channel

SHAPING

OUTPUT

STAGE

V+

V-

ACTIVE

FILTER

COMP.

COMP.

TX DATA OUT

TX DATA OUT

AMP CONTROL

RX DATA OUT

RX DATA OUT

Block Diagram (without Transformer)

CIRCUIT TECHNOLOGY

www.aeroflex.com/act1.htm

General Description

The Aeroflex Circuit Technology

ACT4418D is a new generation

monolithic transceivers which provide

full compliance with Macair and MIL-

STD-1553 data bus requirements

while providing variable amplitude

control.

The ACT4418D performs the front-

end analog function of inputting and

outputting data through a transformer

to a MIL-STD-1553 or Macair data

bus. The ACT4418D can be consid-

ered 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 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. The ACT4418D

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.

Variable amplitude is adjusted with

0–10 Vdc on the control pin.

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 iso-

lation resistors, and loaded by two 70

eroflex Circuit Technology – Data Bus Modules For The Future © SCD4418D REV A 9/24/97

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