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PDF ISL59421 Data sheet ( Hoja de datos )
| Número de pieza | ISL59421 | |
| Descripción | 865MHz Multiplexing Amplifier | |
| Fabricantes | Intersil Corporation | |
| Logotipo |  |
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®
Data Sheet
September 21, 2005
ISL59421
FN7458.1
865MHz Multiplexing Amplifier
The ISL59421 is a 865MHz bandwidth multiplexing amplifier
designed primarily for video switching. This Mux amp has
user-settable gain and also features a high speed three-
state function to enable the output of multiple devices to be
wired together. All logic inputs have pull-downs to ground
and may be left floating. The ENABLE pin, when pulled high,
sets the ISL59421 to the low current power-down mode for
power sensitive applications - consuming just 5mW.
TABLE 1. CHANNEL SELECT LOGIC TABLE
S0 ENABLE HIZ
OUTPUT
000
IN0
100
IN1
X1X
X01
Power Down
High Z
Pinout
ISL59421
(10 Ld MSOP)
TOP VIEW
S0 1
10 IN-
GND 2
IN0 3
ENABLE 4
IN1 5
- 9 OUT
+
8 V+
7 V-
6 HIZ
Features
• 865MHz (-3dB) Bandwidth (AV = 1, VOUT = 100mVP-P)
• 350MHz (-3dB) Bandwidth (AV = 2, VOUT = 2VP-P)
• Slew Rate (AV = 1, RL = 500Ω, VOUT = 4V) . . . . .1417V/µs
• Slew Rate (AV = 2, RL = 500Ω, VOUT = 5V) . . . . .2008V/µs
• Adjustable Gain
• High Speed Three-state Output (HIZ)
• Low Current Power-Down . . . . . . . . . . . . . . . . . . . . .5mW
• Pb-Free Plus Anneal Available (RoHS Compliant)
Applications
• HDTV/DTV Analog Inputs
• Video Projectors
• Computer Monitors
• Set-top Boxes
• Security Video
• Broadcast Video Equipment
Functional Diagram
S0
EN0
DECODE
EN1
IN0
IN1
IN-
- OUT
+
Ordering Information
PART
TAPE & PKG.
PART NUMBER MARKING PACKAGE REEL DWG. #
ISL59421IU
BBRAA 10 Ld MSOP
- MDP0043
ISL59421IU-T7
BBRAA 10 Ld MSOP
7” MDP0043
ISL59421IU-T13 BBRAA 10 Ld MSOP 13” MDP0043
ISL59421IUZ
(Note)
BBSAA 10 Ld MSOP
(Pb-free)
- MDP0043
ISL59421IUZ-T7
(Note)
BBSAA 10 Ld MSOP
(Pb-free)
7” MDP0043
ISL59421IUZ-T13 BBSAA 10 Ld MSOP
(Note)
(Pb-free)
13” MDP0043
NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets;
molding compounds/die attach materials and 100% matte tin plate termination
finish, which are RoHS compliant and compatible with both SnPb and Pb-free
soldering operations. Intersil Pb-free products are MSL classified at Pb-free peak
reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC
J STD-020.
AMPLIFIER BIAS
HIZ
ENABLE
ENABLE pin must be low in order to activate the HIZ state
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2005. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.
1 page  
ISL59421
Typical Performance Curves VS = ±5V, RL = 500Ω to GND, TA = 25°C, unless otherwise specified. (Continued)
0.2
0.1
0
-0.1
CL = 7.2pF
-0.2
-0.3 CL = 6.3pF
-0.4
AV = 2
-0.5 VOUT = 2VP-P
RG = RF = 100Ω
-0.6
CL = 1.6pF
-0.7 CL INCLUDES 1.6pF
BOARD CAPACITANCE
-0.8
1 10
CL = 9.7pF
100
1000
FREQUENCY (MHz)
FIGURE 7. LARGE SIGNAL 0.1dB GAIN vs FREQUENCY vs CL
20
10
AV = 2
VIN = 200mVP-P
0 CL = 4.9pF
RG = RF = 100Ω
-10
-20
-30
-40
-50
-60
-70
-80
0.3
PSRR (V+)
PSRR (V-)
1 10 100
FREQUENCY (MHz)
FIGURE 9. PSRR CHANNELS
1000
0.2
0.1
0
RL = 1kΩ
-0.1
RL = 500Ω
-0.2
-0.3
-0.4
-0.5
AV = 2
-0.6 VOUT = 2VP-P
-0.7 CL = 4.9pF
RG = RF = 100Ω
-0.8
1 10
RL = 75Ω
RL = 150Ω
100 1000
FREQUENCY (MHz)
FIGURE 8. LARGE SIGNAL 0.1dB GAIN vs FREQUENCY vs RL
-10
AV = 2
-20 VIN = 1VP-P
-30 CL = 4.9pF
RG = RF = 100Ω
-40
-50
-60
CROSSTALK
-70
-80
-90
-100
OFF ISOLATION
-110
0.001
0.01
0.1
1 3 6 10
100
FREQUENCY (MHz)
FIGURE 10. CROSSTALK AND OFF ISOLATION
500
24 AV = 1, RF = 500Ω
20
16
12
8
4
0
0.1
1
10
FREQUENCY (kHz)
FIGURE 11. INPUT NOISE vs FREQUENCY
100
5
60 AV = 1, RF = 500Ω
50
40
30
20
10
0
0.1
1
10
FREQUENCY (kHz)
FIGURE 12. INPUT NOISE vs FREQUENCY
100
FN7458.1
September 21, 2005
5 Page 
ISL59421
PC Board Layout
The frequency response of this circuit depends greatly on
the care taken in designing the PC board. The following are
recommendations to achieve optimum high frequency
performance from your PC board.
• The use of low inductance components such as chip
resistors and chip capacitors is strongly recommended.
• Minimize signal trace lengths. Trace inductance and
capacitance can easily limit circuit performance. Avoid
sharp corners, use rounded corners when possible. Vias
in the signal lines add inductance at high frequency and
should be avoided. PCB traces greater than 1" begin to
exhibit transmission line characteristics with signal rise/fall
times of 1ns or less. High frequency performance may be
degraded for traces greater than one inch, unless strip
lines are used.
• Match channel-channel analog I/O trace lengths and
layout symmetry. This will minimize propagation delay
mismatches.
• Maximize use of AC de-coupled PCB layers. All signal I/O
lines should be routed over continuous ground planes (i.e.
no split planes or PCB gaps under these lines). Avoid vias
in the signal I/O lines.
• Use proper value and location of termination resistors.
Termination resistors should be as close to the device as
possible.
• When testing use good quality connectors and cables,
matching cable types and keeping cable lengths to a
minimum.
• Minimum of 2 power supply de-coupling capacitors are
recommended (1000pF, 0.01µF) as close to the device as
possible. Avoid vias between the cap and the device
because vias add unwanted inductance. Larger caps can
be farther away. When vias are required in a layout, they
should be routed as far away from the device as possible.
11 FN7458.1
September 21, 2005
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet ISL59421.PDF ] | |
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