Aeroflex Circuit Technology

SCD4469D REV A 5/21/01 Plainview NY (516) 694-6700

5

Configurations and Ordering Information

Model No.

Receiver Data level

Case

Specs.

Configuration

ACT4469D

Normally Low

DIP

H009

Dual

ACT4469DI

Normally High

Figure 4 – Transmitter (TX) Output Offset

OUTPUT OFFSET

*

OUTPUT OFFSET

*

LAST BIT

2.5 µsec

*Offset measured at point A-A’ in Figure 5

Magnified View

(Total hybrid with one channel transmitting

and the other in standby)

0.4FS

0.8FS

0.6FS

0.2FS

Figure 5 – Typical Transformer connection

N1:N2

A

A'

TX/RX DATA OUT

TX/RX DATA OUT

34

Ω

34

Ω

Transformer turns ratio:

N1:N2 = 1:1

Use Aeroflex 25T1553-1

175

Ω

ACT4469D, CH A

B

B'

FS

Figure 3 – Typical Transmitter Output

Amplitude (Vo) vs Vcont Voltage

0

2

4

6

8

10

CONTROL VOLTAGE

8.4

21

16.8

12.6

4.2

0

Slope =

Figure 6 – Power Dissipation vs. Duty Cycle

0

10

20

30

40

50

60

70

80

90 100

3.2

2.8

2.4

2.0

1.6

1.2

.8

.4

0

DUTY CYCLE – PERCENT

Typical

Maximum

@175

Ω

3.6

+

+

*

*

* External Coupling Capacitors are required for each output.

Recommened 1µF ceramic 25V/50V or can use Tantalum

(15WVDC min) with 0.1µF ceramic in parallel for each output.

C

C