AD8184 Analog Devices, AD8184 Datasheet

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AD8184

Manufacturer Part Number
AD8184
Description
700 MHz/ 5 mA 4-to-1 Video Multiplexer
Manufacturer
Analog Devices
Datasheet

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a
PRODUCT DESCRIPTION
The AD8184 is a high speed 4-to-1 multiplexer. It offers –3 dB
signal bandwidth of 700 MHz along with a slew rate of 750 V/ s.
With 95 dB of crosstalk and 115 dB isolation, it is useful in
many high speed applications. The differential gain and differ-
ential phase error of 0.01% and 0.01 , along with 0.1 dB flatness
of 75 MHz, make AD8184 ideal for professional video multi-
plexing. It offers 10 ns switching time, making it an excellent
choice for pixel switching (picture-in-picture) while consuming
less than 4.5 mA on 5 V supply voltage.
The AD8184 offers a high speed disable feature allowing the
output to be put into a high impedance state. This allows mul-
tiple outputs to be connected together for cascading stages while
the “OFF” channels do not load the output bus. It operates on
voltage supplies of 5 V and is offered in 14-lead PDIP and
SOIC packages.
*All trademarks are the property of their respective holders.
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.
FEATURES
Single and Dual 2-to-1 Also Available (AD8180 and AD8182)
Fully Buffered Inputs and Outputs
Fast Channel Switching: 10 ns
High Speed
Excellent Video Specifications (R
Low Power: 4.4 mA
Low Glitch: < 25 mV
Low All-Hostile Crosstalk of –95 dB @ 5 MHz
High “OFF” Isolation of –115 dB @ 5 MHz
Low Cost
Fast Output Disable Feature for Connecting Multiple Devices
APPLICATIONS
Pin Compatible with HA4314* and GX4314*
Video Switchers and Routers
Pixel Switching for “Picture-In-Picture”
Switching in LCD and Plasma Displays
> 700 MHz Bandwidth (–3 dB)
> 750 V/ s Slew Rate
Fast Settling Time of 15 ns to 0.1%
Gain Flatness of 0.1 dB of 75 MHz
0.01% Differential Gain Error, R
0.01 Differential Phase Error, R
L
L
L
> 2 k )
= 10 k
= 10 k
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703
Figure 1. Small Signal Frequency Response
–1
–2
–3
–4
–5
5
4
3
2
1
0
1M
V
R
ENABLE
0
0
0
0
1
IN
L
FUNCTIONAL BLOCK DIAGRAM
= 5k
= 50mVrms
4-to-1 Video Multiplexer
GND
GND
GND
IN0
IN1
IN2
IN3
World Wide Web Site: http://www.analog.com
Table I. Truth Table
10M
1
2
3
4
5
6
7
NC = NO CONNECT
FREQUENCY – Hz
A1
0
0
1
1
X
+1
+1
+1
+1
DECODER
AD8184
700 MHz, 5 mA
A0
0
1
0
1
X
100M
© Analog Devices, Inc., 1997
14
13
12
11
10
9
8
+V
A0
A1
ENABLE
OUT
NC
–V
S
S
OUTPUT
IN0
IN1
IN2
IN3
High Z
AD8184
1G

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AD8184 Summary of contents

Page 1

... Pixel Switching for “Picture-In-Picture” Switching in LCD and Plasma Displays PRODUCT DESCRIPTION The AD8184 is a high speed 4-to-1 multiplexer. It offers –3 dB signal bandwidth of 700 MHz along with a slew rate of 750 V/ s. With crosstalk and 115 dB isolation useful in many high speed applications. The differential gain and differ- ential phase error of 0 ...

Page 2

... Slew Rate Settling Time to 0.1% DISTORTION/NOISE PERFORMANCE Differential Gain Differential Phase 6 All Hostile Crosstalk AD8184AR 7 OFF Isolation AD8184AR Voltage Noise Total Harmonic Distortion DC/TRANSFER CHARACTERISTICS 8 Voltage Gain Input Offset Voltage Input Offset Voltage Drift Input Offset Voltage Matching Input Bias Current Input Bias Current Drift ...

Page 3

... Specifications subject to change without notice. 1 ABSOLUTE MAXIMUM RATINGS Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12 Internal Power Dissipation AD8184 14-Lead Plastic ( 1.6 Watts AD8184 14-Lead Small Outline ( 1.0 Watts Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V Output Short Circuit Duration . . Observe Power Derating Curves Storage Temperature Range N & R Package . . . . . . . . . . . . . . . . . . . . . – +125 C Lead Temperature Range (Soldering 10 sec) ...

Page 4

... AD8184–Typical Performance Curves DUT OUT 500mV/DIV A0 PULSE OUTPUT –1V 5ns/DIV Figure 3 Channel Switching Characteristics PULSE +1V DUT OUT 800mV/DIV –1V +1V – OFF ON 10ns/DIV Figure 4. Enable and Disable Switching Characteristics OUTPUT SWITCHING A0 25mV/DIV OUTPUT SWITCHING A1 A0 and A1 PULSE ...

Page 5

... OUTPUT AD8184 100k 1M 10M 100M FREQUENCY – 0.446 Vrms LOGIC 1 3 OUTPUT AD8184 100k 1M 10M 100M FREQUENCY – 100 1k 10k 100k 1M FREQUENCY – Hz Figure 14. Voltage Noise vs. Frequency 1G 1G 10M 30M ...

Page 6

... AD8184–Typical Performance Curves p-p OUT – –20 –30 –40 –50 –60 2ND HARMONIC –70 –80 3RD HARMONIC –90 –100 100k 1M FREQUENCY – Hz Figure 15. Harmonic Distortion vs. Frequency 100M 10M 100k Z (DISABLED) 10k OUT 1k Z (ENABLED) OUT 100 10 100 1k 10k ...

Page 7

... Dedicated flatness circuits, combined with the open-loop archi- tecture of the AD8184, keep peaking low (typically < 0.5 dB) when driving high capacitive loads, without the need for external Figure 21. Block Diagram and Simplified Schematic of the AD8184 Multiplexer REV ...

Page 8

... A Buffered 4-to-1 Multiplexer In applications where the output of a multiplexer must drive a back-terminated 75 to buffer the output of the AD8184. In the example in Figure 22, this is accomplished using the AD8009 high speed current feedback op amp. The amplifier is configured with a gain compensate for the signal halving due to termination at the multi- plexer input ...

Page 9

... ADC is generally more economi- cal than using one ADC per channel. In the example shown, we use the AD8184 as the multiplexer. Because of its high bandwidth, the AD8184 is capable of driving the switched capacitor input stage of the AD9220 without addi- tional buffering. In addition to having the required bandwidth necessary to consider the settling time of the multiplexer ...

Page 10

... IN3 R1 49.9 EVALUATION BOARD An evaluation board is available for the AD8184. It has been carefully laid out and tested to demonstrate the specified high speed performance of the devices. Figure 25 shows the sche- matic of the evaluation board. For ordering information, please refer to the Ordering Guide. Figure 26 shows the silkscreen of the component side and Fig- ure 28 shows the silkscreen of the solder side ...

Page 11

... Figure 26. Component Side Silkscreen Figure 27. Board Layout (Component Side) REV. 0 Figure 28. Solder Side Silkscreen Figure 29. Board Layout (Solder Side) –11– AD8184 ...

Page 12

... AD8184 0.210 (5.33) 0.160 (4.06) 0.115 (2.93) OUTLINE DIMENSIONS Dimensions shown in inches and (mm). 14-Lead Plastic DIP (N-14) 0.795 (20.19) 0.725 (18.42 0.280 (7.11) 0.240 (6.10) 0.325 (8.25 0.300 (7.62) 0.060 (1.52) PIN 1 0.015 (0.38) MAX 0.130 (3.30) MIN SEATING 0.022 (0.558) 0.100 0.070 (1.77) PLANE (2.54) 0.014 (0.356) 0.045 (1.15) BSC 14-Lead SOIC (R-14) 0.3444 (8.75) 0.3367 (8.55) ...

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