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參數(shù)資料
| 型號： | ISL59482IRZ |
| 廠商： | INTERSIL CORP |
| 元件分類： | 運動控制電子 |
| 英文描述： | Dual, 500MHz Triple, Multiplexing Amplifiers |
| 中文描述： | TRIPLE 2-CHANNEL, VIDEO MULTIPLEXER, PQCC48 |
| 封裝： | 7 X 7 MM, ROHS COMPLIANT, PLASTIC, QFN-48 |
| 文件頁數(shù)： | 11/14頁 |
| 文件大?。?/td> | 683K |
| 代理商： | ISL59482IRZ |
11
FN6209.2
December 22, 2006
Application Information
General
The ISL59482 is ideal as the matrix element of high
performance switchers and routers. Key features include
internal fixed gain of 2, high impedance buffered analog
inputs and excellent AC performance at output loads down
to 150
Ω
for video cable-driving. The current feedback output
amplifiers are stable operating into capacitive loads.
Ground Connections
For the best isolation and crosstalk rejection, all GND pins
must connect to the GND plane.
Power-up Considerations
The ESD protection circuits use internal diodes from all pins the
V+ and V- supplies. In addition, a dV/dT- triggered clamp is
connected between the V+ and V- pins, as shown in the
Equivalent Circuits 1 through 4 section of the Pin Description
table. The dV/dT triggered clamp imposes a maximum supply
turn-on slew rate of 1V/μs. Damaging currents can flow for
power supply rates-of-rise in excess of 1V/μs, such as during
hot plugging. Under these conditions, additional methods
should be employed to ensure the rate of rise is not exceeded.
Consideration must be given to the order in which power is
applied to the V+ and V- pins, as well as analog and logic
input pins. Schottky diodes (Motorola MBR0550T or
equivalent) connected from V+ to ground and V- to ground
(Figure 28) will shunt damaging currents away from the
internal V+ and V- ESD diodes in the event that the V+
supply is applied to the device before the V- supply. One
Schottky can be used to protect both V+ power supply pins,
and a second for the protection of both V- pins.
If positive voltages are applied to the logic or analog video
input pins before V+ is applied, current will flow through the
internal ESD diodes to the V+ pin. The presence of large
decoupling capacitors and the loading effect of other circuits
connected to V+, can result in damaging currents through
the ESD diodes and other active circuits within the device.
Therefore, adequate current limiting on the digital and
analog inputs is needed to prevent damage during the time
the voltages on these inputs are more positive than V+.
HIZ State
Each internal 4:1 triple MUX-amp has a three-state output
control pin (HIZ1 and HIZ2). Each has a an internal pull-
down resistor to set the output to the enabled state with no
connection to the HIZ pin. The HIZ state is established within
approximately 20ns by placing a logic high (>2V) on the HIZ
pin. If the HIZ state is selected, the output is a high
impedance 1.4M
Ω
with approximately 1.5pF in parallel with
a 10
μ
A bias current from the output. When more than one
MUX shares a common output, the high impedance state
loading effect is minimized over the maximum output voltage
swing and maintains its high Z even in the presence of high
slew rates. The supply current during this state is the same
as the active state.
EN and Power-down States
The EN pin is active low. An internal pull-down resistor
ensures the device will be active with no connection to the
EN pin. The Power-down state is established within
approximately 80ns, if a logic high (>2V) is placed on the EN
pin. In the Power-down state, supply current is reduced
significantly by shutting the three amplifiers off. The output
presents a high impedance to the output pin, however, there
is a risk that the disabled amplifier output can be back-driven
at signal voltage levels exceeding 2V
P-P
. Under this
condition, large incoming slew rates can cause fault currents
of tens of mA. Therefore, the parallel connection of multiple
outputs is not recommended unless the application can
tolerate the limited power-down output impedance.
Limiting the Output Current
No output short circuit current limit exists on these parts. All
applications need to limit the output current to less than
50mA. Adequate thermal heat sinking of the parts is also
required.
V+
V+
V-
V-
V+
V-
V+
V-
LOGIC
CONTROL
GND
IN0
IN1
S0
OUT
EXTERNAL
CIRCUITS
SCHOTTKY
PROTECTION
V+
V-
POWER
GND
SIGNAL
LOGIC
V+ SUPPLY
V- SUPPLY
DE-COUPLING
CAPS
FIGURE 28. SCHOTTKY PROTECTION CIRCUIT
ISL59482
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ISL59482IRZ-T13 | 功能描述:IC MUX AMP DUAL 500MHZ 48-QFN RoHS:是 類別:集成電路 (IC) >> 線性 - 放大器 - 視頻放大器和頻緩沖器 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 應(yīng)用:驅(qū)動器 輸出類型:差分 電路數(shù):3 -3db帶寬:350MHz 轉(zhuǎn)換速率:1000 V/µs 電流 - 電源:14.5mA 電流 - 輸出 / 通道:60mA 電壓 - 電源，單路/雙路(±):5 V ~ 12 V，±2.5 V ~ 6 V 安裝類型:表面貼裝 封裝/外殼:20-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:20-QFN 裸露焊盤（4x4） 包裝:帶卷 (TR) |
| ISL59483 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Dual, 500MHz Triple, Multiplexing Amplifiers |
| ISL59483_07 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Dual, 500MHz Triple, Multiplexing Amplifiers |
| ISL59483EVAL1Z | 功能描述:EVAL BOARD 1 FOR ISL59483 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估演示板和套件 系列:* 標(biāo)準(zhǔn)包裝:1 系列:PCI Express® (PCIe) 主要目的:接口，收發(fā)器，PCI Express 嵌入式:- 已用 IC / 零件:DS80PCI800 主要屬性:- 次要屬性:- 已供物品:板 |
| ISL59483IRZ | 功能描述:IC MUX AMP DUAL 500MHZ 48-QFN RoHS:是 類別:集成電路 (IC) >> 線性 - 放大器 - 視頻放大器和頻緩沖器 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 應(yīng)用:驅(qū)動器 輸出類型:差分 電路數(shù):3 -3db帶寬:350MHz 轉(zhuǎn)換速率:1000 V/µs 電流 - 電源:14.5mA 電流 - 輸出 / 通道:60mA 電壓 - 電源，單路/雙路(±):5 V ~ 12 V，±2.5 V ~ 6 V 安裝類型:表面貼裝 封裝/外殼:20-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:20-QFN 裸露焊盤（4x4） 包裝:帶卷 (TR) |
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