Datasheet

Data Sheet ADA4433-1
Rev. 0 | Page 15 of 16
FULLY DC-COUPLED TRANSMISSION LINE
The ADA4433-1 is designed to be used with high common-mode
rejection, high input impedance receivers, such as the ADA4830-1,
ADA4830-2, or other generic receivers.
The very low output impedance of the ADA4433-1 allows it to
be used in fully dc-coupled transmission line applications in
which there may be a significant discrepancy between voltage
levels at the ground pins of the driver and receiver. As long as
the voltage difference between reference levels at the transmitter
and receiver is within the common-mode range of the receiver,
very little current flow results, and no image degradation is
anticipated.
Figure 26 shows an example configuration of a completely dc-
coupled transmission using the ADA4433-1 along with a high
input impedance differential receiver.
Figure 26. ADA4433-1 Video Filter and ADA4830-1 Difference Amplifier in a DC-Coupled Configuration
INN
VOUT
TO
VIDEO
DECODER
GND
INP
ADA4830-1
ADA4433-1
75Ω
−
+
+
STBENA +VS
4.7µF
0.1µF
+VS
ENABLE
(INPUT)
STB FLAG
(OUTPUT)
2.2µF
0.1µF
4.7kΩ
+V
S
(5.0V)
VREF
−
+
75Ω
TWISTED
PAIR
R
T
+V
S
GND
LPF
LPF
+
STBENA +V
S
ENABLE
(INPUT)
STB FLAG
(OUTPUT)
2.2µF
0.1µF
0.1µF
+V
S
(3.3V)
+IN
–IN
–OUT
+OUT
37.5Ω
1.33kΩ
7.5kΩ
37.5Ω
FROM
IMAGER
OR VIDEO
ENCODER
10597-036