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參數(shù)資料
| 型號： | LT1675CMS8-1 |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 運動控制電子 |
| 英文描述： | 250MHz, Triple and Single RGB Multiplexer with Current Feedback Amplifiers |
| 中文描述： | 2-CHANNEL, VIDEO MULTIPLEXER, PDSO8 |
| 封裝： | PLASTIC, MSOP-8 |
| 文件頁數(shù)： | 10/16頁 |
| 文件大小： | 326K |
| 代理商： | LT1675CMS8-1 |
10
LT1675/LT1675-1
APPLICATIO
S I
N
FOR
ATIO
U
Switching Transients
This MUX includes fast current steering break-before-
make SPDT switches that minimize switching glitches.
The switching transients of Figure 3 are input-referred
(measured between 75
back termination and the 75
load). The glitch is only 50mV
P-P
and the duration is just
5ns. This transient is small and fast enough to not be
visible on quality graphics terminals. Additionally, the
break-before-make SPDT switch is open before the alter-
nate channel is connected. This means there is no input
feedthrough during switching. Figure 4 shows the amount
of alternate channel that is coupled at the input.
W
U
Expanding Inputs
In video routing applications where the ultimate speed is
not mandatory, as it is in pixel switching, it is possible to
expand the number of MUX inputs by shorting the
LT1675 outputs together and switching with the
ENABLE pins. The internal gain set resistors have a nomi-
nal value of 750
and cause a 1500
shunt across the
75
cable termination. Figure 5 shows schematically the
effect of expanding the number of inputs. The effect of this
loading is to cause a gain error that can be calculated by
the following formula:
Gain
n
n
dB
Error (dB)=6dB+20log
–1
75+1575
–1
75
1575
75
where n is total number of LT1675s. For example, using
ten LT1675s (20 Red, 20 Green and 20 Blue) the Gain Error
is only –1.7dB per channel.
Figure 6 shows a 4-input RGB router. The response from
RED 1 Input to Red Output is shown in Figure 7 for a
25MHz square wave with Chip Select = 0V. In this case the
Gain Error is –0.23dB. Toggling with Chip Select between
IC #1 and IC #2 is shown in Figure 8. In this case RED 1
Input is connected to 0V and RED 3 Input is connected to
an uncorrelated sinewave.
0V
3V
1V/DIV
0V
SELECT
PIN 10
50mV/DIV
RED OUT
PIN 15
R
L
= 150
, 10pF SCOPE PROBE
Figure 3. Input-Referred Switching Transient
1675 F03
R
S
= 75
1675 F04
3V
0V
0V
1V/DIV
20mV/DIV
RED 1 IN
PIN 1
SELECT
PIN 10
Figure 4. Switching Transient at RED 1 (Pin 1)
相關PDF資料 |
PDF描述 |
|---|---|
| LT1675CGN | 250MHz, Triple and Single RGB Multiplexer with Current Feedback Amplifiers |
| LT1675CS8-1 | 250MHz, Triple and Single RGB Multiplexer with Current Feedback Amplifiers |
| LT1676C | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| LT1676CN8 | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| LT1676IN8 | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
相關代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT1675CMS8-1#PBF | 功能描述:IC MUX RGB SGL HS W/CFA 8-MSOP 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 標準包裝:3,000 系列:OMNITUNE™ 類型:調(diào)諧器 應用:移動電話，手機，視頻顯示器 安裝類型:表面貼裝 封裝/外殼:65-WFBGA 供應商設備封裝:PG-WFSGA-65 包裝:帶卷 (TR) 其它名稱:SP000365064 |
| LT1675CMS8-1#TR | 功能描述:IC MUX RGB TRIPLE 250MHZ 8MSOP 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 標準包裝:3,000 系列:OMNITUNE™ 類型:調(diào)諧器 應用:移動電話，手機，視頻顯示器 安裝類型:表面貼裝 封裝/外殼:65-WFBGA 供應商設備封裝:PG-WFSGA-65 包裝:帶卷 (TR) 其它名稱:SP000365064 |
| LT1675CMS8-1#TRPBF | 功能描述:IC MUX RGB SGL HS W/CFA 8-MSOP 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 標準包裝:3,000 系列:OMNITUNE™ 類型:調(diào)諧器 應用:移動電話，手機，視頻顯示器 安裝類型:表面貼裝 封裝/外殼:65-WFBGA 供應商設備封裝:PG-WFSGA-65 包裝:帶卷 (TR) 其它名稱:SP000365064 |
| LT1675CS8-1 | 功能描述:IC MUX RGB HI-SPEED SINGLE 8SOIC 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 標準包裝:3,000 系列:OMNITUNE™ 類型:調(diào)諧器 應用:移動電話，手機，視頻顯示器 安裝類型:表面貼裝 封裝/外殼:65-WFBGA 供應商設備封裝:PG-WFSGA-65 包裝:帶卷 (TR) 其它名稱:SP000365064 |
| LT1675CS8-1#PBF | 功能描述:IC MUX RGB HI-SPEED SINGLE 8SOIC 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 標準包裝:3,000 系列:OMNITUNE™ 類型:調(diào)諧器 應用:移動電話，手機，視頻顯示器 安裝類型:表面貼裝 封裝/外殼:65-WFBGA 供應商設備封裝:PG-WFSGA-65 包裝:帶卷 (TR) 其它名稱:SP000365064 |
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