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AD8109ASTZ

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27
325 MHz, 8 × 8 Buffered Video
Crosspoint Switches
Data Sheet
AD8108/AD8109
Rev. C Document Feedback
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 that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©1997–2016 Analog Devices, Inc. All rights reserved.
Technical Support www.analog.com
FEATURES
8 × 8 high speed nonblocking switch arrays
AD8108: G = 1
AD8109: G = 2
Serial or parallel programming of switch array
Serial data out allows daisy-chaining of multiple 8 × 8 arrays
to create larger switch arrays
Output disable allows connection of multiple devices
Pin-compatible with AD8110/AD8111 16 × 8 switch arrays
For 16 × 16 arrays see AD8116
Complete solution
Buffered inputs
Eight output amplifiers
AD8108 (G = 1)
AD8109 (G = 2)
Drives 150 Ω loads
Excellent video performance
60 MHz 0.1 dB gain flatness
0.02%/0.02° differential gain/differential phase error
(R
L
= 150 Ω)
Excellent ac performance
−3 dB bandwidth: 325 MHz (AD8108), 250 MHz (AD8109)
Slew rate: 400 V/µs (AD8108), 480 V/µs (AD8109)
Low power of 45 mA
Low all hostile crosstalk of −83 dB at 5 MHz
Reset pin allows disabling of all outputs (connected through
a capacitor to ground provides power-on reset capability)
Excellent ESD rating: exceeds 4000 V human body model
80-lead LQFP (12 mm × 12 mm)
APPLICATIONS
Routing of high speed signals including
Composite video (NTSC, PAL, S, SECAM)
Component video (YUV, RGB)
Compressed video (MPEG, Wavelet)
3-level digital video (HDB3)
GENERAL DESCRIPTION
The AD8108/AD8109 are high speed 8 × 8 video crosspoint
switch matrices. They offer a −3 dB signal bandwidth greater than
250 MHz and channel switch times of less than 25 ns with 1%
settling. With −83 dB of crosstalk and −98 dB isolation (at 5 MHz),
the AD8108/AD8109 are useful in many high speed applications.
The differential gain and differential phase of better than 0.02%
FUNCTIONAL BLOCK DIAGRAM
AD8108/AD8109
SWITCH
MATRIX
OUTPUT
BUFFER
G = +1
G = +2
32
32
64
32-BIT SHIFT REGISTER
WITH 4-BIT
PARALLEL LOADING
PARALLEL LATCH
DECODE
8
× 4:8 DECODERS
8
CLK
DATA IN
UPDATE
CE
RESET
8 INPUTS
A0
DATA
OUT
8 OUTPUTS
SET INDIVIDUAL
OR RESET ALL
OUTPUTS
TO "OFF"
A1
A2
SER/PAR
D0 D1
D2
D3
ENABLE/DISABLE
01068-001
Figure 1. Functional Block Diagram
and 0.02°, respectively, along with 0.1 dB flatness out to 60 MHz,
make the AD8108/AD8109 ideal for video signal switching.
The AD8108 and AD8109 include eight independent output
buffers that can be placed into a high impedance state for paral-
leling crosspoint outputs so that off channels do not load the
output bus. The AD8108 has a gain of 1, while the AD8109
offers a gain of 2. They operate on voltage supplies of ±5 V
while consuming only 45 mA of idle current. The channel
switching is performed via a serial digital control (which can
accommodate daisy-chaining of several devices) or via a parallel
control allowing updating of an individual output without
reprogramming the entire array.
The AD8108/AD8109 is packaged in an 80-lead LQFP and is
available over the extended industrial temperature range of
−40°C to +85°C.
AD8108/AD8109 Data Sheet
Rev. C | Page 2 of 27
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
General Description ......................................................................... 1
Functional Block Diagram .............................................................. 1
Revision History ............................................................................... 2
AD8108/AD8109—Specifications .................................................. 3
Timing Characteristics (Serial) .................................................. 5
Timing Characteristics (Parallel) ............................................... 6
Absolute Maximum Ratings ............................................................ 8
Maximum Power Dissipation ..................................................... 8
ESD Caution .................................................................................. 8
Pin Configuration and Function Descriptions ............................. 9
Typical Performance Characteristics ........................................... 11
Input/Output Schematics .............................................................. 17
Theory of Operation ...................................................................... 18
Applications ................................................................................ 18
Power-On
RESET
....................................................................... 19
Gain Selection ............................................................................. 19
Creating Larger Crosspoint Arrays .......................................... 20
Multichannel Video ................................................................... 21
Crosstalk ...................................................................................... 22
PCB Layout ...................................................................................... 24
Outline Dimensions ....................................................................... 25
Ordering Guide .......................................................................... 25
REVISION HISTORY
5/2016—Rev. B to Rev. C
Changes to Crosstalk, All Hostile Parameter and Off Isolation,
Input-Output Parameter, Table 3 .................................................... 3
Changes to Areas of Crosstalk Section ........................................ 22
Changes to PCB Layout Section ................................................... 24
Deleted Figure 52; Renumbered Sequentially ............................ 24
Deleted Figure 53 and Figure 54 ................................................... 25
Moved Outline Dimensions and Ordering Guide ..................... 25
Updated Outline Dimensions ....................................................... 25
Changes to Ordering Guide .......................................................... 25
Deleted Figure 55 and Figure 56 ................................................... 26
Deleted Figure 57 ............................................................................ 27
Deleted Evaluation Board Section, Control the Evaluation
Board from a PC Section, Figure 58, Overshoot of PC Printer
Ports’ Data Lines Section, and Figure 59 ..................................... 28
Deleted Figure 60 ............................................................................ 29
9/2005—Rev. A to Rev. B
Updated Format .................................................................. Universal
Change to Absolute Maximum Ratings ......................................... 8
Changes to Maximum Power Dissipation Section ........................ 8
Change to Figure 4 ............................................................................ 8
Updated Outline Dimensions ....................................................... 30
Changes to Ordering Guide .......................................................... 30
1/2002—Rev. 0 to Rev. A
Changed MQFP to LQFP .................................................. Universal
Updated Outline Dimensions ....................................................... 27
10/1997—Revision 0: Initial Version
Data Sheet AD8108/AD8109
Rev. C | Page 3 of 27
SPECIFICATIONS
V
S
= ±5 V, T
A
= +25°C, R
L
= 1 kΩ, unless otherwise noted.
Table 1.
Parameter Test Conditions/Comments Min Typ Max Unit Reference
DYNAMIC PERFORMANCE
−3 dB Bandwidth 200 mV p-p, R
L
= 150 Ω
240/150 325/250 MHz Figure 1, Figure 13
2 V p-p, R
L
= 150 Ω
140/160 MHz Figure 1, Figure 13
Propagation Delay 2 V p-p, R
L
= 150 Ω
5 ns
Slew Rate 2 V Step, R
L
= 150 Ω
400/480 V/µs
Settling Time 0.1%, 2 V Step, R
L
= 150 Ω 40 ns Figure 15, Figure 18
Gain Flatness
0.05 dB, 200 mV p-p, R
L
= 150 Ω
60/50
MHz
Figure 1, Figure 13
0.05 dB, 2 V p-p, R
L
= 150 Ω
60/50 MHz Figure 1, Figure 13
0.1 dB, 200 mV p-p, R
L
= 150 Ω
70/65 MHz Figure 1, Figure 13
0.1 dB, 2 V p-p, R
L
= 150 Ω
80/50 MHz Figure 1, Figure 13
NOISE/DISTORTION PERFORMANCE
Differential Gain Error NTSC or PAL, R
L
= 1 kΩ
0.01 %
NTSC or PAL, R
L
= 150 Ω
0.02 %
Differential Phase Error NTSC or PAL, R
L
= 1 kΩ
0.01 Degrees
NTSC or PAL, R
L
= 150 Ω 0.02 Degrees
Crosstalk, All Hostile f = 5 MHz −83/−85 dB Figure 8, Figure 14
f = 10 MHz −76/−83 dB Figure 8, Figure 14
Off Isolation, Input-Output
f = 5 MHz, R
L
=150 Ω, one
channel
−98/−102 dB Figure 23, Figure 29
Input Voltage Noise 0.01 MHz to 50 MHz 15
nV/√
Hz
Figure 20, Figure 26
DC PERFORMANCE
Gain Error R
L
= 1 kΩ
0.04/0.1 0.07/0.5 %
R
L
= 150 Ω 0.15/0.25 %
Gain Matching
No load, channel-channel
0.02/1.0
%
R
L
= 1 kΩ, channel-channel
0.09/1.0 %
Gain Temperature Coefficient 0.5/8 ppm/°C
OUTPUT CHARACTERISTICS
Output Impedance DC, enabled 0.2 Ω Figure 24, Figure 30
Disabled 10/0.001 MΩ
Figure 21, Figure 27
Output Disable Capacitance Disabled 2 pF
Output Leakage Current Disabled, AD8108 only 1/NA µA
Output Voltage Range
No load
±3
V
Output Current 20 40 mA
Short-Circuit Current 65 mA
INPUT CHARACTERISTICS
Input Offset Voltage Worst case (all configurations) 5 20 mV Figure 35, Figure 41
Temperature coefficient 12 µV/°C Figure 36, Figure 42
Input Voltage Range ±2.5/±1.25 ±3/±1.5 V
Input Capacitance Any switch configuration 2.5 pF
Input Resistance 1 10 MΩ
Input Bias Current
Per output selected
2
5
µA
SWITCHING CHARACTERISTICS
Enable On Time 60 ns
Switching Time, 2 V Step
50%
UPDATE to 1% settling
25 ns
Switching Transient (Glitch) Measured at output 20/30 mV p-p Figure 22, Figure 28
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27

AD8109ASTZ

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Manufacturer:
Analog Devices Inc.
Description:
Analog & Digital Crosspoint ICs 325 MHz 8 x 8 Buffered
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