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參數(shù)資料
| 型號(hào)： | ISL59112IEZ-EVALZ |
| 廠商： | Intersil |
| 文件頁(yè)數(shù)： | 5/8頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | EVAL BOARD FOR ISL59112IEZ |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 系列： | * |
5
FN6142.4
March 15, 2007
Application Information
The ISL59112 is a single supply rail-to-rail output buffer
achieving a -3dB bandwidth of around 40MHz and slew rate
of about 85V/s while demanding only 2mA of supply
current. This part is ideally suited for applications with
specific micropower consumption and high bandwidth
demands. As described in both the performance
characteristics section and the features section, the
ISL59112 is designed to be very attractive for portable
composite video applications.
The ISL59112 features a sync clamp and SAG network at
the output facilitating reduction of typically large AC coupling
capacitors. See Figure 11.
Internal Sync Clamp
The typical embedded video DAC operates from a ground
referenced single supply. This becomes an issue because
the lower level of the sync pulse output may be at a 0V
reference level to some positive level. The problem is
presenting a 0V input to most single supply driven amplifiers
will saturate the output stage of the amplifier, resulting in a
clipped sync tip and degrading the video image. A larger
positive reference may offset the input above its positive
range.
The ISL59112 features an internal sync clamp and an offset
function to level shift the entire video signal to the best level
before it reaches the input of the amplifier stage. These
features are also helpful to avoid saturation of the output
stage of the amplifier by setting the signal closer to the best
voltage range.
The simplified block diagram of the ISL59112 in Figure 11 is
divided into four sections. The first (Section A) is the Sync
Clamp. The AC coupled video sync signal is pulled negative
by a current source at the input of the comparator amplifier.
When the sync tip goes below the comparator threshold, the
output comparator is driven negative and the PMOS device
turns on clamping sync tip to near ground level.
AC Output Coupling and the SAG Network
Composite video signals carry viable information at
frequencies as low as 30Hz up to 5MHz. When a video
system output is AC coupled it is critical that the filter
represented by the output coupling capacitor and the
surrounding resistance network provide a band pass
function with a low pass band low enough to exclude very
low frequencies down to DC, and with a high pass band pass
sufficiently high to include frequencies at the higher end of
the video spectrum.
-
+
–
-
+
IN
RIN
VDD
IN
EN
GND
VDD
EN = GND: SHUTDOWN IDD~0
EN = VDD: ACTIVE IDD~2.0mA
VDC
R6
R5
R4
R7
OUT
SAG
C5
C4
SYNC CLAMP
SAG
NETWORK
AC COUPLING
CAPACITOR
75
Ω
75
Ω
75
Ω
CIN
100nF
47F
22F
FIGURE 11. BLOCK DIAGRAM
ISL59112
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| ISL59112IEZ-T7 | 功能描述:IC VIDEO BUFFER 40MHZ R-R SC70-6 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 供應(yīng)商設(shè)備封裝:8-uMax-EP 包裝:管件 |
| ISL59114 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:YC (S-video) to Composite Video Driver with LPF |
| ISL59114IRUZ | 制造商:Intersil Corporation 功能描述:ISL59114IRUZ PB-FREE YC TO COMPOSITE VIDEO DRIVER WITH LPF - Bulk |
| ISL59114IRUZ-EVALZ | 功能描述:EVAL BOARD FOR ISL59114IRUZ RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評(píng)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 |
| ISL59114IRUZ-T7 | 功能描述:IC VIDEO DRVR YC LPF 10-TQFN 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(dòng)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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