ISL59604IRZ Intersil, ISL59604IRZ Datasheet - Page 20

• Manufacturer Part Number: ISL59604IRZ
• Description: IC VIDEO EQUALIZER 20-QFN
• Manufacturer: Intersil
• Series: MegaQ™r
• Type: Video Equalizerr

Specifications of ISL59604IRZ

• Applications: Security Systems, Video Routing
• Mounting Type: Surface Mount
• Package / Case: 20-VFQFN Exposed Pad
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Functional Description
MegaQ™ Overview
MegaQ™ is a fully automated, stand-alone equalizer for
composite video transmitted over UTP (Unshielded
Twisted Pair, i.e. Cat 5, Cat 6, etc.) or coaxial (RG-59)
cables.
Differential video signals sent over long distances of
twisted pair wire exhibit large high frequency
attenuation, resulting in loss of high frequency
detail/blurring. The exact loss characteristic is a complex
function of wire gauge, length, composition, and coupling
to adjacent conductors.
The video signal can be restored by applying a filter with
the exact inverse transfer function to the far end signal.
MegaQ™ is designed to compensate for the losses due to
long cables, and incorporates the functionality and
flexibility to match a wide variety of cable types and loss
characteristics.
While MegaQ™ was designed and optimized for
stand-alone operation, with no need for any external
control of any kind, it has an optional SPI serial interface
with some additional features. See “Additional
Equalization Modes Available With the Serial Interface”
on page 23 for more information on the features and
operation of the serial interface.
DIFFERENTIAL
DIFFERENTIAL
VIDEO INPUT-
VIDEO INPUT+
ISL59601, ISL59602, ISL59603, ISL59604, ISL59605
(OPTIONAL)
INTERFACE
SERIAL
20
R3
1k
FIGURE 45. APPLICATION CIRCUIT FOR UTP CABLE
R1
R2
49.9
49.9
C1
C2
1.0μF
1.0μF
0.1μF
OPTIONAL FERRITE BEAD –
IN+
IN-
SEN
SCK
SD
C7
~105mA DC CURRENT
~1kΩ AT 100MHz,
V
DD1
ISL59601
ISL59602
ISL59603
ISL59604
ISL59605
GND
FB1
EQ_DISABLE
Equalization for Various Cable Types
Copper-Core
CAT5/CAT5e
CAT6
Coaxial - RG-59
CAT2/CAT3
(telephone wire)
Belden IMSA Spec 39-2 581718
(3-pair traffic light cable)
Non-Copper-Core*
CAT5/CAT5e CCA
(Copper-Coated Aluminum Core)
Coaxial - RG-59 CCS
(Copper-Coated Steel Core)
*Image quality will be significantly improved over
unequalized cable, but there will still be some image smearing
due to the high resistance of the core material.
V
LOCKED
INVERT
DD2
FREEZE
COLOR
V REF
OUT
CFB
C8
0.1μF
TABLE 1. CABLE TYPES AND LENGTHS
CABLE TYPE
+5V
C6
0.47μF
C4
1500pF
4.7μF
C9
300
INTERNALLY
GENERATED
FREEZES EQ ONCE LOCK IS ACHIEVED
R5
C5
0.022μF
R6
75.0
LENGTH SUPPORTED
VIDEO OUT
MAXIMUM
5300 feet
5600 feet
6000 feet
3000 feet
5300 feet
2000 feet
1500 feet
November 23, 2010
FN6739.1