REV. A
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a
AD8072/AD8073
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700 World Wide Web Site: http://www.analog.com
Fax: 781/326-8703 © Analog Devices, Inc., 2000
Low Cost, Dual/Triple
Video Amplifiers
FUNCTIONAL BLOCK DIAGRAMS
8-Lead Plastic (N), SOIC (R), and H9262SOIC (RM) Packages
1
2
3
4
8
7
6
5
AD8072
H11545IN2
–IN2
OUT2
H11545V
S
OUT1
–IN1
H11545IN1
–V
S
14-Lead Plastic (N), and SOIC (R) Packages
AD8072
–IN2
OUT2NC
NC
NC
H11545V
S
H11545IN3
7
H11545IN1
–IN1
OUT1
H11545IN2
–V
S
–IN3
8
OUT3
AD8073
NC = NO CONNECT
6 9
5 10
4 11
3 12
2 13
1 14
FEATURES
Very Low Cost
Good Video Specifications (R
L
= 150 H9024)
Gain Flatness of 0.1 dB to 10 MHz
0.05% Differential Gain Error
0.1H11543 Differential Phase Error
Low Power
3.5 mA/Amplifier Supply Current
Operates on Single +5 V to +12 V Supply
High Speed
100 MHz, –3 dB Bandwidth (G = +2)
500 V/H9262s Slew Rate
Fast Settling Time of 25 ns (0.1%)
Easy to Use
30 mA Output Current
Output Swing to 1.3 V of Rails on Single +5 V Supply
APPLICATIONS
Video Line Driver
Computer Video Plug-In Boards
RGB or S-Video Amplifier in Component Systems
PRODUCT DESCRIPTION
The AD8072 (dual) and AD8073 (triple) are low cost, current
feedback amplifiers intended for high volume, cost sensitive
applications. In addition to being low cost, these amplifiers
deliver solid video performance into a 150 Ω load while consuming
only 3.5 mA per amplifier of supply current. Furthermore, the
AD8073 is three amplifiers in a single 14-lead narrow-body
SOIC package. This makes it ideal for applications where small
size is essential. Each amplifier’s inputs and output are acces-
sible providing added gain setting flexibility.
These devices provide 30 mA of output current per amplifier,
and are optimized for driving one back terminated video load
(150 Ω) each. These current feedback amplifiers feature gain
flatness of 0.1 dB to 10 MHz while offering differential gain and
phase error of 0.05% and 0.1°. This makes the AD8072 and
AD8073 ideal for business and consumer video electronics.
Both will operate from a single +5 V to +12 V power supply.
The outputs of each amplifier swing to within 1.3 volts of either
supply rail to accommodate video signals on a single +5 V supply.
The high bandwidth of 100 MHz, 500 V/µs of slew rate, along
with settling to 0.1% in 25 ns, make the AD8072 and AD8073
useful in many general purpose, high speed applications where a
single +5 V or dual power supplies up to ±6 V are needed. The
AD8072 is available in 8-lead plastic DIP, SOIC, and µSOIC
packages while the AD8073 is available in 14-lead plastic DIP and
SOIC packages. Both operate over the commercial temperature
range of 0°C to +70°C. Additionally, the AD8072ARM oper-
ates over the industrial temperature range of –40°C to +85°C.
FREQUENCY – MHz
6.1
GAIN FLATNESS
–
dB
6.0
5.3
0.1 5001 10 100
5.9
5.8
5.4
5.7
5.6
5.5
6
5
4
3
2
1
0
V
S
= H115505V
V
O
= 2V p-p
R
F
= R
G
= 1kH9024
R
L
= 150H9024
A
V
= H115452 CLOSED-LOOP GAIN
–
dB
7
–1
0.1 dB
DIV
1 dB
DIV
Figure 1. Large Signal Frequency Response