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參數(shù)資料
| 型號(hào)： | ISL59451IRZ |
| 廠商： | Intersil |
| 文件頁(yè)數(shù)： | 6/17頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC AMP TRIPLE MUX 250MHZ 32-QFN |
| 標(biāo)準(zhǔn)包裝： | 60 |
| 應(yīng)用： | 4:1 多路復(fù)用器-放大器 |
| 電路數(shù)： | 3 |
| -3db帶寬： | 240MHz |
| 轉(zhuǎn)換速率： | 930 V/µs |
| 電流 - 電源： | 45mA |
| 電流 - 輸出 / 通道： | 125mA |
| 電壓 - 電源，單路/雙路(±)： | 4.5 V ~ 5.5 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 32-VFQFN 裸露焊盤(pán) |
| 供應(yīng)商設(shè)備封裝： | 32-TQFN-EP（5x5） |
| 包裝： | 散裝 |
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14
FN6253.0
September 24, 2007
AC Test Circuits
testing AC performance at 150
Ω loads. Figure 35C
illustrates how to use the optimal 150
Ω load for a 50Ω cable.
Figure 35D illustrates the optimum output load for 50
Ω and
75
Ω cable-driving.
Application Information
General
The ISL59451 triple 4:1 MUX video driver features single
+5V supply operation, high bandwidth and TTL/CMOS logic
compatible gain select (AV2) of x1 (0dB) or x2 (+6dB). It also
includes a DC restore function to set the blanking level of the
output signal.
The ISL59451 implements the video DC-restore function
with a high performance gain-adjustable video amplifier and
a nulling, sample-hold amplifier to establish a user defined
DC reference voltage at the video amplifier output. A
detailed description of the DC-restore function implemented
in the ISL59451 can be found in application note AN1089,
EL4089 and EL4390 DC-Restored Video Amplifier. The
ISL59451 performs the same function with the exception that
it is designed for single supply operation. Each of the three
output channels feature DC restore functionality.
Video Amplifier Operation
(refer to “Functional Block Diagram” on page 12)
The ISL59451 video amplifier (A1) is a voltage-feed, high
performance video amplifier designed for +5V operation.
The output stage is capable of swinging to within 15mV of
the negative rail. The differential input stage contains an
internal voltage reference that positions the non-inverting
input DC level (V1) to ~1.6V higher than ground. This offset
ensures that the amplifier input DC level is maintained within
the common mode input voltage range. The amplifier
non-inverting gain is given in Equation 1.
DC-Restore Amplifier
(refer to “Functional Block Diagram” on page 12)
The DC-restore circuit contains a voltage reference amplifier
and an analog switch function that closes the DC-restore
loop under control of the CLAMP logic input. The A2
amplifier output stage operates in a current-feedback mode
with a source capability of 860A (Typ).
A logic “0” at the CLAMP input closes switch S1, which
closes the DC-restore loop. The video input AC coupling
capacitor, CX1, acts as a DC hold capacitor (through the
75
Ω termination resistor) to average the current-source
output of amplifier A2. When the DC-restore loop has
reached equilibrium, the DC voltage stored on CX1 will be
the value required to set the voltages at A1 (VOUT) and A2
FIGURE 35A. TEST CIRCUIT WITH OPTIMAL OUTPUT LOAD
FIGURE 35B. INTER-STAGE APPLICATION CIRCUIT
FIGURE 35C. 150
Ω TEST CIRCUIT WITH 50Ω LOAD
FIGURE 35D. BACKLOADED TEST CIRCUIT FOR
50
Ω/75Ω
VIDEO CABLE APPLICATION
FIGURE 35. AC TEST CIRCUITS
ISL59451
*CL
50
Ω
VIN
RL
2.1pF
OR
75
Ω
150
Ω
*CL Includes PCB trace capacitance
VOUT
x2
ISL59451
CS
50
Ω
VIN
RL
OR
75
Ω
LCRIT
RS
CL
x2
ISL59451
RS
*CL
VIN
118
Ω
TEST
2.1pF
50
Ω
86.6
Ω
50
Ω
EQUIPMENT
*CL Includes PCB trace capacitance
LCRIT
x2
ISL59451
RS
*CL
VIN
50
Ω or 75Ω
TEST
2.1pF
50
Ω
OR
75
Ω
50
Ω/75Ω
EQUIPMENT
*CL Includes PCB trace capacitance
LCRIT
x2
V
OUT
V
IN+
1.6V
–
()
1
R
F
R
G
--------
+
=
(EQ. 1)
V
OUT(DC)
V
REF
=
(EQ. 2)
V
IN+
V
OUT(DC)
1.6V
+
=
(EQ. 3)
ISL59451
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ISL59451IRZ-T7 | 功能描述:IC AMP MUX TRIPLE 4:1 DC 32-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:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:50 系列:- 應(yīng)用:TFT-LCD 面板：VCOM 驅(qū)動(dòng)器 輸出類型:滿擺幅 電路數(shù):1 -3db帶寬:35MHz 轉(zhuǎn)換速率:40 V/µs 電流 - 電源:3.7mA 電流 - 輸出 / 通道:1.3A 電壓 - 電源，單路/雙路(±):9 V ~ 20 V，±4.5 V ~ 10 V 安裝類型:表面貼裝 封裝/外殼:8-TSSOP，8-MSOP（0.118"，3.00mm 寬）裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:8-uMax-EP 包裝:管件 |
| ISL59452 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Triple 4:1 Single Supply Video Multiplexing Amplifier |
| ISL59452IRZ | 功能描述:IC AMP TRIPLE MUX 250MHZ 32-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:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:50 系列:- 應(yīng)用:TFT-LCD 面板：VCOM 驅(qū)動(dòng)器 輸出類型:滿擺幅 電路數(shù):1 -3db帶寬:35MHz 轉(zhuǎn)換速率:40 V/µs 電流 - 電源:3.7mA 電流 - 輸出 / 通道:1.3A 電壓 - 電源，單路/雙路(±):9 V ~ 20 V，±4.5 V ~ 10 V 安裝類型:表面貼裝 封裝/外殼:8-TSSOP，8-MSOP（0.118"，3.00mm 寬）裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:8-uMax-EP 包裝:管件 |
| ISL59452IRZ-T7 | 功能描述:IC AMP MUX TRIPLE 4:1 DC 32-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:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:50 系列:- 應(yīng)用:TFT-LCD 面板：VCOM 驅(qū)動(dòng)器 輸出類型:滿擺幅 電路數(shù):1 -3db帶寬:35MHz 轉(zhuǎn)換速率:40 V/µs 電流 - 電源:3.7mA 電流 - 輸出 / 通道:1.3A 電壓 - 電源，單路/雙路(±):9 V ~ 20 V，±4.5 V ~ 10 V 安裝類型:表面貼裝 封裝/外殼:8-TSSOP，8-MSOP（0.118"，3.00mm 寬）裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:8-uMax-EP 包裝:管件 |
| ISL59481 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Dual, 500MHz Triple, Multiplexing Amplifiers |
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