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PDF ISL59424 Data sheet ( Hoja de datos )
| Número de pieza | ISL59424 | |
| Descripción | (ISL59424 / ISL59445) Triple Multiplexing Amplifiers | |
| Fabricantes | Intersil Corporation | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de ISL59424 (archivo pdf) en la parte inferior de esta página. Total 13 Páginas | ||
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Data Sheet
ISL59424, ISL59445
September 8, 2005
FN7456.2
1GHz Triple Multiplexing Amplifiers
The ISL59424 and ISL59445 are 1GHz bandwidth
multiplexing amplifiers designed primarily for video input
switching. These MUX-amps exhibit a fixed gain of 1 and
also feature a high speed three-state 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 EN pin,
when pulled high, sets the ISL59424 and ISL59445 in to low
current mode - consuming just 15mW. An added feature in
the ISL59424 is a latch enable function (LE) that allows
independent logic control using a common logic bus. When
LE is high the last logic state is preserved.
TABLE 1. CHANNEL SELECT LOGIC TABLE ISL59424
S0 ENABLE
HIZ
LE
OUTPUT
00
0 0 INO (A, B, C)
10
0 0 IN1 (A, B, C)
X1
X X Power Down
X0
1X
High Z
X0
0 1 Last S0 State
Preserved
TABLE 2. CHANNEL SELECT LOGIC TABLE ISL59445
S1 S0 ENABLE HIZ
OUTPUT
0 0 0 0 IN0 (A, B, C)
0 1 0 0 IN1 (A, B, C)
1 0 0 0 IN2 (A, B, C)
1 1 0 0 IN3 (A, B, C)
X X 1 X Power Down
XX 0 1
High Z
Features
• Triple 2:1 and 4:1 Multiplexers for RGB
• Internally Set Gain-of-1
• High Speed Three-state Outputs (HIZ)
• Power-down Mode (EN)
• Latch Enable (ISL59424)
• ±5V Operation
• ±1200 V/µsec Slew Rate
• 1GHz Bandwidth
• Latched Select Pin (ISL59424)
• Pb-Free Plus Anneal Available (RoHS Compliant)
Applications
• HDTV/DTV Analog Inputs
• Video Projectors
• Computer Monitors
• Set-top Boxes
• Security Video
• Broadcast Video Equipment
Ordering Information
PART
TAPE & PKG.
PART NUMBER MARKING PACKAGE REEL DWG. #
ISL59424IR
ISL59424IR 24 Ld QFN
- MDP0046
ISL59424IR-T7 ISL59424IR 24 Ld QFN 7” MDP0046
ISL59424IR-T13 ISL59424IR 24 Ld QFN 13” MDP0046
ISL59424IRZ
(Note)
ISL59424IRZ 24 Ld QFN
(Pb-free)
- MDP0046
ISL59424IRZ-T7 ISL59424IRZ 24 Ld QFN
(Note)
(Pb-free)
7” MDP0046
ISL59424IRZ-T13 ISL59424IRZ 24 Ld QFN
(Note)
(Pb-free)
13” MDP0046
ISL59445IR
ISL59445IR 32 Ld QFN* - MDP0046
ISL59445IR-T7 ISL59445IR 32 Ld QFN* 7” MDP0046
ISL59445IR-T13 ISL59445IR 32 Ld QFN* 13” MDP0046
*32 Ld QFN Exposed Pad Size 2.48 x 3.40mm
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.
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  
ISL59424, ISL59445
Typical Performance Curves VS = ±5V, RL = 500Ω to GND, TA = 25°C, unless otherwise specified. (Continued)
0.2
SOURCE
0.1 POWER =-12dBm
0
CL=2.0pF
100
SOURCE
POWER =-12dBm
ISL59424
-0.1 10
-0.2
-0.3
CL=0.5pF
CL=1.5pF
ISL59445
-0.4
1
-0.5
-0.6
-0.7
-0.8
1
10 100
FREQUENCY (MHz)
1K 1.2K
0.1
0.1
1 10
FREQUENCY (MHz)
100
FIGURE 3. 0.1dB GAIN vs FREQUENCY
FIGURE 4. ROUT vs FREQUENCY
1K
0.8
RL=500Ω
0.6 CL=1.5pF
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
TIME (5ns/DIV)
FIGURE 5. ISL59424 TRANSIENT RESPONSE
0.8
RL=500Ω
0.6 CL=1.5pF
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
TIME (5ns/DIV)
FIGURE 6. ISL59445 TRANSIENT RESPONSE
0
-10
-20
INPUT X TO OUTPUT Y
CROSSTALK
-30
-40
-50 OFF ISOLATION
INPUT X TO OUTPUT X
-60
-70
-80
-90
-100
0.1
1
10 100
FREQUENCY (MHz)
1K
FIGURE 7. ISL59424 CROSSTALK AND OFF ISOLATION
5
0
-10
-20
INPUT X TO OUTPUT Y
CROSSTALK
-30
-40
OFF ISOLATION
INPUT X TO OUTPUT X
-50
-60
-70
-80
-90
-100
0.1
1
10 100
FREQUENCY (MHz)
1K
FIGURE 8. ISL59445 CROSSTALK AND OFF ISOLATION
FN7456.2
September 8, 2005
5 Page 
ISL59424, ISL59445
The QFN Package Requires Additional PCB Layout
Rules for the Thermal Pad
The thermal pad is electrically connected to V- supply
through the high resistance IC substrate. Its primary function
is to provide heat sinking for the IC. However, because of the
connection to the V- supply through the substrate, the
thermal pad must be tied to the V- supply to prevent
unwanted current flow to the thermal pad. Do not tie this pin
to GND. Connecting this pin to GND could result in large
back biased currents flowing between GND and V-. The
ISL59445 uses the package with pad dimensions of
D2 = 2.48mm and E2 = 3.4mm.
Maximum AC performance is achieved if the thermal pad is
attached to a dedicated de-coupled layer in a multi-layered
PC board. In cases where a dedicated layer is not possible,
AC performance may be reduced at upper frequencies.
The thermal pad requirements are proportional to power
dissipation and ambient temperature. A dedicated layer
eliminates the need for individual thermal pad area. When a
dedicated layer is not possible a 1” x 1” pad area is sufficient
for the ISL59445 that is dissipating 0.5W in +50°C ambient.
Pad area requirements should be evaluated on a case by
case basis.
11 FN7456.2
September 8, 2005
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet ISL59424.PDF ] | |
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