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參數(shù)資料
| 型號： | LT1675 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | 250MHz, Triple RGB Multiplexer with Current Feedback Amplifiers(250MHz,三路RGB多路轉(zhuǎn)換器（帶電流反饋放大器）) |
| 中文描述： | 250MHz的，三重的RGB多路復(fù)用器與電流反饋放大器（250MHz下，三路的RGB多路轉(zhuǎn)換器（帶電流反饋放大器）） |
| 文件頁數(shù)： | 9/16頁 |
| 文件大?。?/td> | 256K |
| 代理商： | LT1675 |
9
LT1675/LT1675-1
APPLICATIO
S I
FOR
ATIO
U
W
U
U
Power Supplies
The LT1675 will function with supply voltages below
±
2V
(4V total), however, to ensure a full 1V
P-P
video signal
(2V
P-P
at the output pins), the power supply voltage
should be between
±
4V to
±
6V. The LT1675 is designed
to operate on
±
5V, and at no time should the supplies
exceed
±
6V. The power supplies should be bypassed with
quality tantalum capacitors. It may be necessary to add a
0.01
μ
F or 0.1
μ
F in parallel with the tantalum capacitors if
there is excessive ringing on the output waveform. Even
though the LT1675 is well behaved, bypass capacitors
should be placed as close to the LT1675 as possible.
Smallest Package and PC Board Space
The LT1675 has the internal gain set for +2V/V or 6dB,
because it is designed to drive a double-terminated 50
or
75
cable that has an inherent 6dB loss. There are several
advantages to setting the gain internally. This topology
eliminates six gain set resistors, reduces the pin count of
the package and eliminates stray capacitance on the
sensitive feedback node. The LT1675 fits into the small
SSOP package, and these advantages lead to the smallest
PC board footprint with enhanced performance. The
LT1675-1 eliminates two gain set resistors and is available
in the tiny MSOP package and the cost-effective SO-8
package.
Fast Switching
The key to the LT1675 fast switching speed is Linear
Technology’s proprietary high speed bipolar process.
Internal switches can change state in less than 1ns, but the
output of the MUX switches in about 2.5ns, as shown in
Figure 1. The additional delay is due to the finite bandwidth
and the slew rate of the current feedback amplifier that
drives the cable.
For minimum ringing, it is important to minimize the load
capacitance on the output of the part. This is normally not
a problem in a controlled impedance environment, but
stray PC board capacitance and scope probe capacitance
can degrade the pulse fidelity. Figure 2 shows the
response of the output to various capacitive loads mea-
sured with a 10pF scope probe.
MEASURED AT PIN 15
R
L
= 150
, 10pF SCOPE PROBE
1675 F02
C
L
= 20pF
C
L
= 10pF
C
L
= 0pF
2V/DIV
Figure 2. Response to Capacitive Loads
1V/DIV
500mV/DIV
0V
3V
SELECT
PIN 10
RED OUT
PIN 15
RED 1 = 1V, RED 2 = 0V
MEASURED BETWEEN 75
BACK TERMINATION
AND 75
LOAD
1675 F01
Figure 1. Toggling at 25MHz
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LT1675-1 | 250MHz, Single RGB Multiplexer with Current Feedback Amplifiers(250MHz,單路RGB多路轉(zhuǎn)換器（帶電流反饋放大器）) |
| LT1676 | Wide Input Range, High Efficiency, Step-Down Switching Regulator(寬輸入范圍，高效率，步降開關(guān)穩(wěn)壓器) |
| LT1677 | Low Noise, Rail-to-Rail Precision Op Amp(低噪聲，滿幅度輸入和輸出精密運算放大器) |
| LT1684 | Micropower Ring Tone Generator |
| LT1684CN | Micropower Ring Tone Generator |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT1675-1 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:250MHz, Triple and Single RGB Multiplexer with Current Feedback Amplifiers |
| LT1675CGN | 功能描述:IC MUX RGB HISPEED TRIPLE 16SSOP RoHS:否 類別:集成電路 (IC) >> 線性 - 視頻處理 系列:- 產(chǎn)品變化通告:Product Discontinuation 07/Mar/2011 標(biāo)準(zhǔn)包裝:3,000 系列:OMNITUNE™ 類型:調(diào)諧器 應(yīng)用:移動電話，手機(jī)，視頻顯示器 安裝類型:表面貼裝 封裝/外殼:65-WFBGA 供應(yīng)商設(shè)備封裝:PG-WFSGA-65 包裝:帶卷 (TR) 其它名稱:SP000365064 |
| LT1675CGN#PBF | 功能描述:IC MUX RGB HISPEED TRIPLE 16SSOP RoHS:是 類別:集成電路 (IC) >> 線性 - 視頻處理 系列:- 標(biāo)準(zhǔn)包裝:250 系列:- 類型:電平移位器 應(yīng)用:LCD 電視機(jī)/監(jiān)控器 安裝類型:表面貼裝 封裝/外殼:28-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:28-WQFN（4x4）裸露焊盤 包裝:帶卷 (TR) 其它名稱:296-32523-2TPS65198RUYT-ND |
| LT1675CGN#TR | 功能描述:IC MUX RGB TRIPLE 250MHZ 16SSOP RoHS:否 類別:集成電路 (IC) >> 線性 - 視頻處理 系列:- 產(chǎn)品變化通告:Product Discontinuation 07/Mar/2011 標(biāo)準(zhǔn)包裝:3,000 系列:OMNITUNE™ 類型:調(diào)諧器 應(yīng)用:移動電話，手機(jī)，視頻顯示器 安裝類型:表面貼裝 封裝/外殼:65-WFBGA 供應(yīng)商設(shè)備封裝:PG-WFSGA-65 包裝:帶卷 (TR) 其它名稱:SP000365064 |
| LT1675CGN#TRPBF | 功能描述:IC MUX RGB HISPEED TRIPLE 16SSOP RoHS:是 類別:集成電路 (IC) >> 線性 - 視頻處理 系列:- 產(chǎn)品變化通告:Product Discontinuation 07/Mar/2011 標(biāo)準(zhǔn)包裝:3,000 系列:OMNITUNE™ 類型:調(diào)諧器 應(yīng)用:移動電話，手機(jī)，視頻顯示器 安裝類型:表面貼裝 封裝/外殼:65-WFBGA 供應(yīng)商設(shè)備封裝:PG-WFSGA-65 包裝:帶卷 (TR) 其它名稱:SP000365064 |
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