Evaluation Board User Guide
UG-861
One
Technology
Way
•
P.O.
Box
9106
•
Norwood,
MA
02062-9106,
U.S.A.
•
Tel:
781.329.4700
•
Fax:
781.461.3113
•
www.analog.com
Evaluation Board for the
AD8147
/
AD8148
Triple Differential Drivers for
Wideband Video
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.
Rev. 0 | Page 1 of 6
FEATURES
Full featured evaluation board for the
AD8147
/
AD8148
Uses VGA as input and Cat-5 as output
Single 5 V or dual ±2.5 V/±5 V operation
EVALUATION KIT CONTENTS
AD8147-EVALZ
/
AD8148-EVALZ
evaluation board
Instruction guide for user guide download
EQUIPMENT NEEDED
Signal source or video pattern generator and signal analyzer
Power supply options: +5 V/1 A, ±2.5 V/1 A, or ±5 V/1 A
Female to male VGA cable for input
Cat-5 cable for output
GENERAL DESCRIPTION
The
AD8147
/
AD8148
are high speed triple, differential or
single-ended input to differential output drivers. The
AD8147
has a fixed gain of 2, and the
AD8148
has a fixed gain of 4.
The
AD8147
and
AD8148
devices are designed for the highest
resolution component video signals but can be used for any type
of analog signals or high speed data transmission over either a
Category 5 UTP (Cat-5) cable or differential printed circuit board
(PCB) transmission lines.
These drivers can be used with the
AD8145
triple, differential
to single-ended receiver, and the
AD8117
crosspoint switch, to
produce a video distribution system capable of supporting UXGA
or 1080p signals.
Manufactured on the Analog Devices, Inc., second generation
XFCB bipolar process, the drivers have large signal bandwidths
of 700 MHz and fast slew rates. They have an internal common-
mode feedback feature that provides output amplitude and phase
matching that is balanced to −60 dB at 50 MHz, suppressing even
order harmonics and minimizing radiated electromagnetic
interference (EMI).
Both the
AD8147
and
AD8148
encode vertical and horizontal sync
signals on the common-mode voltages of the outputs. All outputs
can be independently set to low voltage states to be used with series
diodes for line isolation, allowing easy, differential multiplexing
over the same twisted pair cable.
The
AD8147
/
AD8148
are available in a 24-lead LFCSP and
operate over a temperature range of −40°C to +85°C.
This user guide provides all supporting documents for evaluating
the
AD8147
/
AD8148
. Consult the
AD8147
and
AD8148
data
sheets, which provide additional information, when working with
the evaluation board.
EVALUATION BOARD PHOTOGRAPH AND BLOCK DIAGRAM
AD8147/
AD8148
OPD
1
V
S–
2
–IN R
3
+IN R
4
V
S–
5
SYNC LEVEL
V
S+
(SYNC)
–IN B
+IN B
V
S–
18
17
16
15
14
–OUT R
6
–OUT B
13
V
S+
–I
N
G
+I
N
G
V
S–
(
S
Y
NC)
V
SY
N
C
24
23
22
21
20
H
SY
N
C
19
+O
U
T
R
V
S+
+O
U
T
G
–O
U
T
G
V
S+
7
8
9
10
11
+O
U
T
B
12
A
B
C
×2
133
62-
0
01
Figure 1.
Downloaded from
