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参数资料
| 型号： | LM1276AAA/NA |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 1 CHANNEL, VIDEO PREAMPLIFIER, PDIP28 |
| 封装： | PLASTIC, DIP-28 |
| 文件页数： | 4/50页 |
| 文件大小： | 6075K |
| 代理商： | LM1276AAA/NA |
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Pin Descriptions and Application Information
Pin
No.
Pin Name
Schematic
Description
1
V Sync
Logic level vertical sync signal received from the
video card in the PC or sync stripper circuit.
2
4
Analog V
CC
Analog Ground
Ground pin and power supply pin for the input analog
portion of the LM1276. Note the recommended
charge storage and high frequency capacitors, which
should be as close to pins 2 and 4 as possible.
3
V
REFREXT
External current set resistor, 10k 1%, sets the internal
bias current level for optimum performance of the
LM1276. This resistor should be placed as close to
pin 3 and the pin 4 ground return as possible.
5
6
7
Blue Video In
Red Video In
Green Video In
These video inputs must be AC coupled with a .0047
F cap. Internal DC restoration is done at these
inputs. A series resistor of about 33
and external
ESD protection diodes should also be used for
protection from ESD damage.
8
9
PLL Ground
PLL Filter
Recommended topology and values are shown to the
left. It is recommended that both filter branches be
bypassed to the independent ground as close to pin
8 as possible. Great care should be taken to prevent
external signals from coupling into this filter from
video, I2C, etc.
10
PLL V
CC
The ground pin should be connected to the rest of the
circuit ground by a short but independent PCB trace
to prevent contamination by extraneous signals. The
PLL V
CC pin should be isolated from the rest of the
V
CC line by a ferrite bead and bypassed to pin 8 with
an electrolytic capacitor and a high frequency
ceramic.
www.national.com
12
200969 Version 2 Revision 4
Print Date/Time: 2011/07/11 11:20:12
LM1276
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LM1279 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:110 MHz RGB Video Amplifier System with OSD |
| LM12791DL WAF | 制造商:Texas Instruments 功能描述: |
| LM1279A | 制造商:未知厂家 制造商全称:未知厂家 功能描述: |
| LM1279AN | 功能描述:IC AMP RGB VIDEO SYSTEM 20-DIP RoHS:否 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) |
| LM1279DL WAF | 制造商:Texas Instruments 功能描述: |
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