参数资料
| 型号： | ISL59112IEZ-T7 |
| 厂商： | Intersil |
| 文件页数： | 5/8页 |
| 文件大小： | 0K |
| 描述： | IC VIDEO BUFFER 40MHZ R-R SC70-6 |
| 标准包装： | 1 |
| 应用： | 缓冲器 |
| 输出类型： | 满摆幅 |
| 电路数： | 1 |
| -3db带宽： | 40MHz |
| 转换速率： | 85 V/µs |
| 电流 - 电源： | 2mA |
| 电流 - 输出 / 通道： | 115mA |
| 电压 - 电源，单路/双路(±)： | 2.5 V ~ 3.6 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 6-TSSOP，SC-88，SOT-363 |
| 供应商设备封装： | SC-70-6 |
| 包装： | 标准包装 |
| 产品目录页面： | 1235 (CN2011-ZH PDF) |
| 其它名称： | ISL59112IEZ-T7DKR |
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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| ISL59114IRUZ-T7 | IC VIDEO DRVR YC LPF 10-TQFN |
| ISL59115IRUZ-T7 | IC VIDEO DRVR TRI-CHN LPF 10TQFN |
| ISL59116IIZ-T7 | IC VIDEO DRVR YC LPF 9-CSP |
| ISL59117IIZ-T7 | IC VIDEO DRVR TRI-CHN LPF WLCSP |
| ISL59118IRUZ-T7 | IC VIDEO DRVR DUAL LPF 10-TQFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL59114 | 制造商:INTERSIL 制造商全称: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 类别:编程器，开发系统 >> 评估演示板和套件 系列:* 标准包装:1 系列:PCI Express® (PCIe) 主要目的:接口，收发器，PCI Express 嵌入式:- 已用 IC / 零件:DS80PCI800 主要属性:- 次要属性:- 已供物品:板 |
| ISL59114IRUZ-T7 | 功能描述:IC VIDEO DRVR YC LPF 10-TQFN RoHS:是 类别:集成电路 (IC) >> 线性 - 放大器 - 视频放大器和频缓冲器 系列:- 标准包装:1,000 系列:- 应用:驱动器 输出类型:差分 电路数:3 -3db带宽:350MHz 转换速率:1000 V/µs 电流 - 电源:14.5mA 电流 - 输出 / 通道:60mA 电压 - 电源，单路/双路(±):5 V ~ 12 V，±2.5 V ~ 6 V 安装类型:表面贴装 封装/外壳:20-VFQFN 裸露焊盘 供应商设备封装:20-QFN 裸露焊盘（4x4） 包装:带卷 (TR) |
| ISL59114RUZ-T7 | 制造商:Intersil Corporation 功能描述:YC (S-video) to Composite Video Driver with LPF |
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