Figure 3 - Transmitter (TX) Output Wave form
Figure 4 - Transmitter (TX) Output offset
Last Bit
t
f
*
90%
Magnified View
OUTPUT OFFSET
*
6.5V P-P MIN
8.5V P-P MAX
0 Volts
0 Volts
OUTPUT OFFSET
*
10%
2.5 µsec
t
r
*
* 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
4.0
N1:N2
B
Ctr
tap
B’
TX DATA OUT
52.5Ω
RX DATA IN
RX DATA IN
Transformer turns ratios:
N1:N2 = 1:1
N1:N3 = 1:0.71
Use Aeroflex 25T1553-1
0
0
10
20
30
40
50
60
70
80
90 100
A’
52.5Ω
A
N1:N3 for
stub
coupling
POWER DISSIPATION
WATTS
3.5
3.0
2.5
2.0
1.5
1.0
0.5
(TYPICAL)
TX DATA OUT
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 3K
Ω
minimum, power on or off.
3. Specifications apply over the temperature range of -55°C to +125°C (case temperature)
unless otherwise noted.
4. All typical values are measured at +25°C
The information contained in this data sheet is believed to be accurate; however, Aeroflex Circuit Technology.
assumes no responsibility for its use, and no licence or rights are granted by implication or otherwise in connection
therewith.
Aeroflex Circuit Technology
5
SCD4404 REV D 10/27/99 Plainview NY (516) 694-6700
AEROFLEX [ AEROFLEX CIRCUIT TECHNOLOGY ]
