參數(shù)資料
型號(hào)： EL4544IGZ
廠商： Intersil
文件頁(yè)數(shù)： 16/26頁(yè)
文件大?。?/td> 0K
描述： IC CROSSPOINT VID 16X5RGB 356BGA
標(biāo)準(zhǔn)包裝： 400
功能： 交叉點(diǎn)開(kāi)關(guān)
電路： 3 x 16:5
電壓電源： 單電源
電壓 - 電源，單路/雙路(±)： 4.75 V ~ 5.25 V，2.4 V ~ 3.6 V
工作溫度： -40°C ~ 85°C
安裝類(lèi)型： 表面貼裝
封裝/外殼： 356-BGA
供應(yīng)商設(shè)備封裝： 356-PBGA（27x27）
包裝： 散裝
產(chǎn)品目錄頁(yè)面： 1246 (CN2011-ZH PDF)
23
FN7362.5
February 23, 2012
Functional Overview
Overall Functionality
The EL4544 is a video crosspoint switch that has 16 (RGB
differential) input channels (with H and V sync embedded in
their common-modes) which connect via an internal
crosspoint mux to 5 (RGB + HV) single-ended output
channels. The 5th output group has enhanced features that
include: a pixel-by-pixel overlay mux and auto-calibrated
offset cancellation. All analog and digital outputs have a
high-impedance state, allowing several EL4544 to share the
same output connections.
16 RGB Differential Video Inputs with Encoded
Sync
For each of the 16 RGB groups of differential video inputs,
horizontal and vertical sync are encoded as a combination of
the common modes for each RGB group. Each of these
differential input pins has a single-ended signal range that
spans the entire 0V to 5V supply range. The embedded sync
signals are provided by the EL4543 Triple Differential
Twisted Pair Driver IC.
Overall Analog Signal Flow
There are four independent internal input multiplexors
represented as Ai, Bi, Ci, and Di in the “I/O Block Diagram
page 15 (hexa-decimal addresses 0h, 1h, 2h, 3h). These
muxes convert the selected RGB differential input signal to
single-ended RGB and extract H and V sync. The five output
crosspoint multiplexors represented as Ax, Bx, Cx, Dx, and
Sx
, can independently select from the four internal (RGBHV)
signal groups Ai, Bi, Ci, and Di by programming the
hexadecimal serial bus addresses 8h, 9h, Ah, Bh, and Ch.
There are five RGBHV single-ended output signal groups
labelled A, B, C, D, and S which buffer signals from the
corresponding crosspoint outputs Ax, Bx, Cx, Dx, and Sx.
Each of these output groups has an independent reference
pin (RefA, RefB, RefC, RefD, and RefS) that allows the user
to program the reference level that corresponds to a zero
voltage differential input.
Analog and Digital Video Outputs
All analog outputs (A, B, C, D, and S) have a signal range
from 0V to 3.5V and are capable of driving the 150
Ω load
presented by a terminated video cable. The H and V sync
outputs and all other digital I/O are compatible with 3V
operation; their signal swings are determined by connecting
the digital supply pin Vdp to a 3V source.
All the analog video outputs must be terminated with an AC
or DC coupled 150 load to ground. If power dissipation is
an issue and DC coupling is not desired, then placing a
150 resistor in series with a 100pF capacitor to ground will
provide adequate termination.
How to Configure the Analog Video Outputs to
Swing to 0V
The RGB analog outputs of the A, B, C, D, and S output
groups are all capable of a range of swing that reaches the
negative supply pin Vm = 0V. However, since the EL4544
has no internal supply connections, its single-ended outputs
run out of bandwidth, slew rate, and linearity below 0.5V. If
accurate wide band performance below 0.5V is required,
add external pull-down resistors between each analog
output and an external -5V supply.
This will keep the output stage biased. Values between 3k
Ω
to 1k
Ω are suggested. The lower the selected resistance, the
wider the bandwidth will be at 0V, but lower external
resistance will increase overall IC power dissipation
significantly since these resistors are loading their respective
output stages.
FIGURE 43. IP3 AVIN = 2 BLUE CHANNEL
FIGURE 44. IP3 AVIN = 1 BLUE CHANNEL
Typical Performance Curves (Continued)
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
9.995 9.997 9.999 10.001 10.003 10.005 10.007 10.009
FREQUENCY (MHz)
AMPLITUDE
(dBm
)
IP3 = 33.9
AVIN = 2
f1 = 10MHz
f2 = 10.004MHz
0
f1
f2
2f2-f1
2f1-f2
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
9.995 9.997 9.999 10.001 10.003 10.005 10.007 10.009
FREQUENCY (MHz)
AMPLITUDE
(dBm
)
IP3 = 24.5
AVIN = 1
f1 = 10MHz
f2 = 10.004MHz
f2
2f1-f2
2f2-f1
f1
EL4544
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