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AD8174-EB

更新时间： 2024-11-22 23:16:19
品牌 Logo 应用领域
亚德诺 - ADI 复用器开关放大器
页数 文件大小 规格书
16页 476K
描述
250 MHz, 10 ns Switching Multiplexers w/Amplifier

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250 MHz, 10 ns Switching  
Multiplexers w/Amplifier  
a
AD8170/AD8174  
FUNCTIONAL BLOCK DIAGRAM  
AD8170  
FEATURES  
Fully Buffered Inputs and Outputs  
Fast Channel Switching: 10 ns  
Internal Current Feedback Output Amplifier  
High Output Drive: 50 mA  
Flexible Gain Setting via External Resistor(s)  
High Speed  
SELECT  
1
2
3
4
8
7
6
5
V
OUT  
–V  
+V  
GND  
IN  
–V  
S
S
IN1  
IN0  
+1  
+1  
250 MHz Bandwidth, G = +2  
1000 V/␮s Slew Rate  
Fast Settling Time of 15 ns to 0.1%  
Low Power: < 10 mA  
Excellent Video Specifications (RL = 150 ⍀, G = +2)  
Gain Flatness of 0.1 dB Beyond 80 MHz  
0.02% Differential Gain Error  
AD8174  
+1  
+V  
14  
13  
12  
1
2
3
4
IN0  
GND  
IN1  
S
V
OUT  
–V  
IN  
+1  
+1  
+1  
2
GND  
IN2  
11 SD  
0.05؇ Differential Phase Error  
Low Crosstalk of –78 dB @ 5 MHz  
High Disable Isolation of –88 dB @ 5 MHz  
High Shutdown Isolation of –92 dB @ 5 MHz  
Low Cost  
ENABLE  
10  
9
5
6
7
A1  
A0  
–V  
S
8
IN3  
2
Fast Output Disable Feature for Connecting Multiple  
Devices (AD8174 Only)  
Shutdown Feature Reduces Power to 1.5 mA (AD8174 Only)  
APPLICATIONS  
The AD8174 offers a high speed disable feature allowing the  
output to be put into a high impedance state for cascading  
stages so that the off channels do not load the output bus.  
Additionally, the AD8174 can be shut down (SD) when not in  
use to minimize power consumption (IS = 1.5 mA). These  
products will be offered in 8-lead and 14-lead PDIP and SOIC  
packages.  
Pixel Switching for “Picture-In-Picture”  
LCD and Plasma Displays  
Video Routers  
PRODUCT DESCRIPTION  
The AD8170(2:1) and AD8174(4:1) are very high speed  
buffered multiplexers. These multiplexers offer an internal  
current feedback output amplifier whose gain can be pro-  
grammed via external resistors and is capable of delivering 50  
mA of output current. They offer –3 dB signal bandwidth of  
250 MHz and slew rate of greater than 1000 V/µs. Additionally,  
the AD8170 and AD8174 have excellent video specifications  
with low differential gain and differential phase error of 0.02%  
and 0.05° and 0.1 dB flatness out to 80 MHz. With a low 78  
dB of crosstalk and better than 88 dB isolation, these devices are  
useful in many high speed applications. These are low power  
devices consuming only 9.7 mA from a ±5 V supply.  
0
V
= 50mV rms  
IN  
G = +2  
–1  
–2  
–3  
–4  
–5  
–6  
–7  
–8  
–9  
R
R
R
= 499Ω (AD8170R)  
F
F
L
= 549Ω (AD8174R)  
= 100Ω  
0.1  
0
–0.1  
–0.2  
–0.3  
–0.4  
–0.5  
1M  
10M  
100M  
1G  
FREQUENCY – Hz  
Figure 1. Small Signal Frequency Response  
REV. 0  
Information furnished by Analog Devices is believed to be accurate and  
reliable. However, no responsibility is assumed by Analog Devices for its  
use, nor for any infringements of patents or other rights of third parties  
which 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: 617/329-4700  
Fax: 617/326-8703  
World Wide Web Site: http://www.analog.com  
© Analog Devices, Inc., 1996  
1234567...16

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