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參數(shù)資料
| 型號： | EL4583CS |
| 廠商： | Intersil |
| 文件頁數(shù)： | 9/10頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC VIDEO SYNC SEPARATOR 16-SOIC |
| 標準包裝： | 47 |
| 類型： | 同步分離器 |
| 應用： | 多媒體顯示器，測試設備 |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 16-SOIC（0.154"，3.90mm 寬） |
| 供應商設備封裝： | 16-SOIC |
| 包裝： | 管件 |
8
FN7173.4
March 28, 2013
Description of Operation
A simplified block schematic is shown in Figure 1. The
following description is intended to provide the user with
sufficient information to understand the effects of the
external components and signal conditions on the outputs of
the integrated circuit.
The video signal is AC coupled to pin 4 via the capacitor C1,
nominally 0.1F. The clamp circuit A1 will prevent the input
signal on pin 4 going more negative than 1.5V, the value of
reference voltage VR1. Thus the sync tip, the most negative
part of the video waveform, will be clamped at 1.5V. The
current source I1, nominally 6A, charges the coupling
capacitor during the remaining portion of the H line,
approximately 58s for a 15.75kHz timebase. From I t = C V,
the video time-constant can be calculated. It is important to
note that the charge taken from the capacitor during video
must be replaced during the sync tip time, which is much
shorter, (ratio of x 12.5). The corresponding current to
restore the charge during sync will therefore be an order of
magnitude higher, and any resistance in series with CI will
cause sync tip crushing. For this reason, the internal series
resistance has been minimized and external high resistance
values in series with the input coupling capacitor should be
avoided. The user can exercise some control over the value
of the input time constant by introducing an external pull-up
resistance from pin 4 to the 5V supply. The maximum
voltage across the resistance will be VDD less 1.5V, for black
level. For a net discharge current greater than zero, the
resistance should be greater than 450k. This will have the
effect of increasing the time constant and reducing the
degree of picture tilt. The current source I1 directly tracks
reference current ITR and thus increases with scan rate
adjustment, as explained later.
FIGURE 4. STANDARD (NTSC INPUT) H. SYNC DETAIL
EL4583
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參數(shù)描述 |
|---|---|
| EL4583CS-T13 | 功能描述:IC SYNC SEPARATOR S-H 50% 16SOIC 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 |
| EL4583CS-T7 | 功能描述:IC VIDEO SYNC SEPARATOR 16-SOIC 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 |
| EL4583CSZ | 功能描述:視頻 IC EL4583CSZ SYNC SEP BROADCAST QLTY RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel |
| EL4583CSZ | 制造商:Intersil Corporation 功能描述:IC TV/ VIDEO 16SOIC |
| EL4583CSZ-T13 | 功能描述:視頻 IC EL4583CSZ SYNC SEP BROADCAST QLTY RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel |
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