ACT4480-DFI (2/13)

Standard Products
ACT4480-DFI Dual Transceiver
for H009 Specification
www.aeroflex.com/avionics
February 27, 2013
FEATURES
□
Dual transceiver meets McDonnell Douglas H009 data bus specifications
□
Operates with ±12V to ±15 and +5V power supplies
□
Monolithic construction using linear ASICs
□
Packaging – Low profile ceramic
- 0.60''W x 0.80''L x 0.14''H
□
Designed for commercial, industrial and aerospace applications
□
Full MIL-PRF-38534 qualification pending
DESCRIPTION
The Aeroflex Plainview transceiver model ACT4480-DFI is a new generation monolithic transceiver which
provides compliance with H009 data bus requirements using three DC power supplies operation. The
dual channel ACT4480-DFI performs the front-end analog function of inputting and outputting data
through a transformer to a H009 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. The active filter
design provides the required H009 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 complementary TTL data at the input, and when coupled to the data
bus with a 1:1 transformer, isolated on the transceiver side with two 34 Ohm bus terminating resistors, with
the bus terminated by a 175 Ohm resistor, the data bus signal produced is 20VP-P nominal at A-A' (See
Figure 5). When both DATA and DATA inputs are held low or high, the transmitter output remains a low
impedance and signal is “removed” from the line. In addition, an overriding “INHIBIT" input returns the
output to a high impedance state. A logic “1” applied to the “INHIBIT” takes priority over the condition of
the data inputs and disables the transmitter (See Transmitter Logic Waveforms - Figure 2).
The transmitter utilizes an active filter to suppress harmonics above 1MHz to meet H009 specifications.
The transmitter may be safely operated for an indefinite period at 100% duty cycle into a data bus short
circuit.
RECEIVER
The Receiver section accepts bi-phase differential data at the input and produces two TTL signals at the
output. The outputs are DATA and DATA, and represent positive and negative excursions of the input
beyond a pre-determined threshold (See Receiver Logic Waveforms - Figure 3).
The internal threshold is nominally set to detect data bus signals exceeding 2.0VP-P when used with a
1:1 turns ratio transformer (See Figure 5 for transformer data and typical connection).
A low level at the Strobe input inhibits the DATA and DATA outputs (Pin is internally pulled up).
SCD4480-DFI
ABSOLUTE MAXIMUM RATINGS
Operating Case Temperature
-55°C to +125°C
Storage Case Temperature
-65°C to +150°C
± 18V
Power Supply Voltages
+ 7V
-0.3V to +5.5V
Logic Input Voltage
Receiver Differential Input
± 40V
Receiver Input Voltage (Common Mode)
± 10V
Driver Peak Output Current
15mA
Total Package Power Dissipation over the Full Operating
Case Temperature Range
3.6 Watts
18°C
Maximum Junction to Case Temperature (100% duty cycle)
5°C / W
Junction-Case, Thermal Resistance
1/
1/ It is recommended this hybrid be heat sunk to lower case temperature so the junction temperature never exceeds 135°C.
ELECTRICAL CHARACTERISTICS – DRIVER SECTION 1/ 2/
INPUT CHARACTERISTICS, TX DATA IN OR TX DATA IN
Parameter
Condition
Symbol
Min
Typ
Max
Unit
"0" Input Current
VIN = 0.4V
IILD
-
-0.2
-0.4
mA
"1" Input Current
VIN = 2.7V
IIHD
-
1
40
µA
"0" Input Voltage
-
VILD
-
-
0.7
V
"1" Input Voltage
-
VIHD
2.0
-
-
V
"0" Input Current
VIN = 0.4V
IILI
-
-0.2
-0.4
mA
"1" Input Current
VIN = 2.7 V
IIHI
-
1.0
40
µA
"0" Input Voltage
-
VILI
-
-
0.7
V
"1" Input Voltage
-
VIHI
2
-
-
V
Delay from TX inhibit, (0→1) to inhibited output
-
tDXOFF
-
200
500
nS
Delay from TX inhibit, (1→0) to active output
-
tDXON
-
150
400
nS
Differential Output Noise, inhibit mode
-
VNOI
-
2
10
mVp-p
Differential Output Impedance (inhibited)
4/
ZOI
10K
-
-
Ω
Point A - A'
VO
16
20
24
V p-p
-
tR & tF
200
260
300
nS
Point A - A'
VOS
-
-
± 260
mV peak
-
tDTX
-
280
400
nS
INHIBIT CHARACTERISTICS
OUTPUT CHARACTERISTICS
Differential output level (175Ω)
Rise and Fall Times
(10% to 90% of p-p output)
Output Offset, Figure 4
5/
Delay from 50% point of TX DATA or TX DATA
input to zero crossing of differential signal
1/
SCD4480-DFI Rev B 2/27/2013
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Aeroflex Plainview
ELECTRICAL CHARACTERISTICS – RECEIVER SECTION 1/ 2/
Parameter
Condition
Symbol
Min
Typ
Max
Unit
Differential Voltage Range
3/
Point A - A'
VIDR
-
-
20
VPEAK
Common Mode Rejection Ratio
3/
-
CMMR
45
-
-
dB
STROBE CHARACTERISTICS (Logic '0' Inhibits Output)
(NOTE: If not used, a 1K pullup to 5V is recommended)
"0" Input Current
VS = 0.4V
IIL
-
- 0.2
- 0.4
mA
"1" Input Current
VS = 2.7V
IIH
-
1
+ 40
µA
"0" Input Voltage
-
VIL
-
-
0.7
V
"1" Input Voltage
-
VIH
2.0
-
-
V
Strobe Delay (turn-on or turn-off)
-
TSD(ON/OFF)
-
90
150
nS
VTH
1.5
2.0
3.0
VP-P
THRESHOLD CHARACTERISTICS (Sinewave Input )
Internal Threshold Voltage, Point A-A'
Figure 5
1MHz
OUTPUT CHARACTERISTICS, RX DATA AND RX DATA
"1" State
IOH = -0.4mA
VOH
2.5
3.6
-
V
"0" State
IOL = 4mA
VOL
-
0.35
0.5
V
Delay, (average) from differential input zero
crossings to RX DATA and RX DATA output
6/
50% points
tDRX
-
300
450
nS
Unit
POWER SUPPLY CURRENT
VCC = +12V to +15V, VEE = -12V to -15V, VL = +5V
Duty Cycle
Transmitter Standby
50%
Condition
Symbol
Typ
Max
Point A - A'
ZO = 175Ω,
VO = 21VP-P
ICC
IEE
IL
12
30
32
20
50
40
Figure 5
ICC
IEE
IL
52
70
32
66
90
40
ICC
IEE
IL
95
112
32
120
130
40
100%
mA
Notes:
1. VCC = +15Volts ± 0.75V, VEE = -15Volts ± 0.75V, VIL = +5 Volts ± 0.5V, TC = -55°C to +125°C, unless otherwise specified.
2. All typical values are measured at +25°C.
3. Characteristics guaranteed by design, not production tested.
4. Power ON/OFF, measured 1MHz at Point A-A' Figure 4.
5. At point A-A' on Figure 4 or 5, 2.5µS after midpoint crossing of the parity bit of the last word.
6. This test is performed while the Transceiver is reading its own transmission. This condition is called "Wraparound". Standard TTL
loads applied to RX DATA Outputs.
SCD4480-DFI Rev B 2/27/2013
3
Aeroflex Plainview
BLOCK DIAGRAM
(WITHOUT TRANSFORMER, CHANNEL A SHOWN)
CHANNEL A (CHANNEL B)
SCD4480-DFI Rev B 2/27/2013
4
Aeroflex Plainview
DATA
DATA
INHIBIT
OUTPUT
X
X
H
High Z
H
H
L
L
L
L
H
L
L
L
H
L
Low Z (No signal)
Low Z (Signal)
FIGURE 1 – TX OUTPUT TRUTH TABLE
Notes: 1. Data and DATA inputs must be complementary waveforms or 50% duty cycle average, with no delays between them, and in the
same state during the off time (both high and low).
2. Region 1; no output signal, High Z state, (Receive Mode), Region 2; No Output signal, Low Z state, Region 3; Transmitter signal
on, low Z (Transmitter mode), Region 4; No Output signal, Low Z state, (Terminate Mode).
FIGURE 2 – TRANSMITTER LOGIC WAVEFORMS
SCD4480-DFI Rev B 2/27/2013
5
Aeroflex Plainview
FIGURE 3 – RECEIVER LOGIC WAVEFORMS
*Offset measured at point A-A’ in Figure 5
FIGURE 4 – TRANSMITTER (TX) OUTPUT OFFSET
SCD4480-DFI Rev B 2/27/2013
6
Aeroflex Plainview
FIGURE 5 – TYPICAL TRANSFORMER CONNECTION
SCD4480-DFI Rev B 2/27/2013
7
Aeroflex Plainview
Dimensions shown are in inches.
FIGURE 6 – PACKAGE CONFIGURATION OUTLINE
SCD4480-DFI Rev B 2/27/2013
8
Aeroflex Plainview
Pin#
Function
Channel
1
A_TXOUT / RXIN
A
2
A_TXOUT_L / RXIN_L
A
3
VCC
-
4
A_RX_STROBE
A
5
A_RXOUT
A
6
A_RXOUT_L
A
7
A_GND
A
8
NO CONNECTION
-
9
B_DIGITAL_GND
B
10
B_TX_INHIBIT
B
11
B_TX_IN_L
B
12
B_TX_IN
B
13
B_TXOUT/RXIN
B
14
B_TXOUT_L / RXIN_L
B
15
B_RX_STROBE
B
16
B_RXOUT
B
17
B_RXOUT_L
B
18
B_GND
B
19
VEE
-
20
A_DIGITAL_GND
A
21
VL
-
22
A_TX_INHIBIT
A
23
A_TX_IN_L
A
24
A_TX_IN
A
FIGURE 7 - LEAD NUMBERS & FUNCTIONS
SCD4480-DFI Rev B 2/27/2013
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Aeroflex Plainview
ACT4480 Power Dissipation
Total Power Input
The ACT4480-DFI uses ±15 Volt supplies and a +5 Volt supply.
Total Input Power: Channel A transmitting, Channel B in standby
Conditions
CH_A: Transmitting at 30vpk-pk into a
243Ω load resistance.
CH_B: Standby (Receive mode,
Transmitter inhibited)
Supply Voltages
Supply Current
(100% Duty Cycle)
Power
+15 Volts
76mA
1.140 Watts
-15 Volts
93mA
1.395 Watts
+5 Volts
33mA
0.165 Watts
Total Power
2.700 Watts
Total Input Power: Channel A and Channel B in standby
Conditions
CH_A: Standby (Receive mode,
Transmitter inhibited)
CH_B: Standby (Receive mode,
Transmitter inhibited)
+15 Volts
Supply Current
(100% Duty Cycle)
12mA
0.180 Watts
-15 Volts
30mA
0.450 Watts
+5 Volts
31mA
0.155 Watts
Supply Voltages
Total Power
Power
0.785 Watts
Load Power (measured)
VSECONDARY:
30.0Vpk-pk, line to line, measured across RLoad
RLoad:
34 + 34 + 175
= 243 Ω
ISECONDARY:
15.0Vpk / 243 Ohms
= 61.73mApk
Instantaneous Power:
15.0V * 61.73mA
= 926mWatts (960mW measured)
Average Power
Total Hybrid Power Dissipation:
= 569mW
2.7W – 569mW
Θjc
= 2.131 Watts
= 3.02°C/W (Calculated)
Junction Temperature Rise over Case
CH_A Die Transmitting = 2.131 x 3.02°C/W = 6.40°C
Junction Temperature Rise over Case
CH_B Die Standby
SCD4480-DFI Rev B 2/27/2013
10
= 0.785 x 3.02°C/W = 2.37°C
Aeroflex Plainview
CONFIGURATIONS AND ORDERING INFORMATION
DESC SMD Receiver Data
level
Model No.
Screening
ACT4480-DFI-7
Commercial flow, +25°C testing only
N/A
Normally High
Flat
Pack
ACT4480-DFI
Military Temperature, -55°C to +125°C
Screened in accordance with the individual
Test Methods of MIL-STD-883 for Military Applications.
Pending
Normally High
Flat
Pack
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Aeroflex Microelectronic Solutions reserves the right to
change at any time without notice the specifications,
design, function, or form of its products described herein.
All parameters must be validated for each customer's
application by engineering. No liability is assumed as a
result of use of this product. No patent licenses are implied.
SCD4480-DFI Rev A 2/6/2013
Case
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11
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