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AN-692

更新时间： 2024-11-11 12:53:55
品牌 Logo 应用领域
亚德诺 - ADI 视频放大器
页数 文件大小 规格书
13页 369K
描述
Low Cost, Dual/Triple Video Amplifiers

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AN-692 数据手册

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Low Cost, Dual/Triple  
Video Amplifiers  
a
AD8072/AD8073  
FEATURES  
PIN CONFIGURATIONS  
Very Low Cost  
8-Lead Plastic (N), SOIC (R), and ␮SOIC (RM) Packages  
Good Video Specifications (RL = 150 ⍀)  
Gain Flatness of 0.1 dB to 10 MHz  
0.05% Differential Gain Error  
0.1؇ 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/␮s Slew Rate  
Fast Settling Time of 25 ns (0.1%)  
Easy to Use  
1
2
3
4
8
7
6
5
OUT1  
–IN1  
+IN1  
+V  
S
OUT2  
–IN2  
+IN2  
–V  
S
AD8072  
TOP VIEW  
(Not to Scale)  
14-Lead Plastic (N), and SOIC (R) Packages  
30 mA Output Current  
Output Swing to 1.3 V of Rails on Single 5 V Supply  
NC  
NC  
NC  
1
2
3
4
5
6
7
14  
13  
12  
11  
10  
9
OUT2  
–IN2  
+IN2  
APPLICATIONS  
Video Line Driver  
Computer Video Plug-In Boards  
RGB or S-Video Amplifier in Component Systems  
AD8073  
TOP VIEW  
(Not to Scale)  
+V  
–V  
S
S
+IN1  
+IN3  
–IN3  
OUT3  
–IN1  
8
OUT1  
PRODUCT DESCRIPTION  
NC = NO CONNECT  
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.  
6.1  
6.0  
5.9  
5.8  
5.7  
5.6  
5.5  
7
6
5
4
3
2
1
0
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.  
V
V
R
R
A
= ؎5V  
= 2V p-p  
S
1 dB  
DIV  
O
= R = 1k⍀  
F
L
V
G
= 150⍀  
= ؉2  
0.1 dB  
DIV  
5.4  
5.3  
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 sup-  
ply rail to accommodate video signals on a single 5 V supply.  
–1  
0.1  
1
10  
100  
500  
FREQUENCY – MHz  
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 operates  
over the industrial temperature range of –40°C to +85°C.  
Figure 1. Large Signal Frequency Response  
REV. D  
Information furnished by Analog Devices is believed to be accurate and  
reliable. However, no responsibility is assumed by Analog Devices for its  
use, norforanyinfringementsofpatentsorotherrightsofthirdpartiesthat  
may result from its use. No license is granted by implication or otherwise  
under any patent or patent rights of Analog Devices.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781/329-4700  
Fax: 781/326-8703  
www.analog.com  
© Analog Devices, Inc., 2002  
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