Datasheet

ADA4432-1/ADA4433-1 Data Sheet
Rev. A | Page 22 of 28
FULLY DC-COUPLED TRANSMISSION LINE
The ADA4432-1and ADA4433-1 are 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 ADA4432-1 and the
ADA4433-1 allow them 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 54 and Figure 55 show an example configuration of a
completely dc-coupled transmission using the ADA4432-1 and
the ADA4433-1 along with a high input impedance differential
receiver.
Figure 54. ADA4432-1 Video Filter and the ADA4830-1 Difference Amplifier in a DC-Coupled Configuration
Figure 55. ADA4433-1 Video Filter and ADA4830-1 Difference Amplifier in a DC-Coupled Configuration
R
T
FROM
IMAGER
OR VIDEO
ENCODER
INN
VOUT
TO VIDEO
DECODER
GND
INP
ADA4830-1
75Ω
−
+
+
STBENA +VS
4.7µF
0.1µF
+VS
ENABLE
(INPUT)
STB FLAG
(OUTPUT)
2.2µF
0.1µF
4.99kΩ
+V
S
(5.0V)
+V
S
(3.3V)
VREF
−
+
75Ω
TWISTED
PAIR
STB
ENABLE
(INPUT)
ADA4432-1 LFCSP PACKAGE
75Ω
IN
GND
OUT
2.2µF
ENA +V
S
0.1µF
10597-037
STB
STB FLAG
(OUTPUT)
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
4.99kΩ
+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