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LMH6572MQX/NOPB PDF预览

LMH6572MQX/NOPB

更新时间： 2024-02-19 07:28:50
品牌 Logo 应用领域
美国国家半导体 - NSC 光电二极管
页数 文件大小 规格书
12页 398K
描述
IC TRIPLE 2-CHANNEL, VIDEO MULTIPLEXER, PDSO16, SSOP-16, Multiplexer or Switch

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LMH6572MQX/NOPB 技术参数

是否无铅： 不含铅是否Rohs认证： 符合
生命周期：Active零件包装代码：SOIC
包装说明：SSOP, SSOP16,.25针数：16
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01Factory Lead Time：1 week
风险等级：0.97模拟集成电路 - 其他类型：VIDEO MULTIPLEXER
JESD-30 代码：R-PDSO-G16JESD-609代码：e3
长度：4.9 mm湿度敏感等级：1
负电源电压最大值（Vsup）：-6 V负电源电压最小值（Vsup）：-3 V
标称负供电电压 (Vsup)：-3.3 V正常位置：NC
信道数量：3功能数量：3
端子数量：16最高工作温度：85 °C
最低工作温度：-40 °C输出：COMMON OUTPUT
封装主体材料：PLASTIC/EPOXY封装代码：SSOP
封装等效代码：SSOP16,.25封装形状：RECTANGULAR
封装形式：SMALL OUTLINE, SHRINK PITCH峰值回流温度（摄氏度）：260
电源：3.3/5 V认证状态：Not Qualified
座面最大高度：1.75 mm最大信号电流：0.02 A
子类别：Multiplexer or Switches最大供电电流 (Isup)：28.5 mA
最大供电电压 (Vsup)：6 V最小供电电压 (Vsup)：3 V
标称供电电压 (Vsup)：3.3 V表面贴装：YES
温度等级：INDUSTRIAL端子面层：Matte Tin (Sn)
端子形式：GULL WING端子节距：0.64 mm
端子位置：DUAL处于峰值回流温度下的最长时间：NOT SPECIFIED
宽度：3.9 mmBase Number Matches：1

LMH6572MQX/NOPB 数据手册

 浏览型号LMH6572MQX/NOPB的Datasheet PDF文件第5页浏览型号LMH6572MQX/NOPB的Datasheet PDF文件第6页浏览型号LMH6572MQX/NOPB的Datasheet PDF文件第7页浏览型号LMH6572MQX/NOPB的Datasheet PDF文件第9页浏览型号LMH6572MQX/NOPB的Datasheet PDF文件第10页浏览型号LMH6572MQX/NOPB的Datasheet PDF文件第11页 
Application Notes  
GENERAL INFORMATION  
The LMH6572 is a high-speed triple 2:1 multiplexer, opti-  
mized for very high speed and low distortion. With a fixed  
gain of 2 and excellent AC performance, the LMH6572 is  
ideally suited for switching high resolution, presentation  
grade video signals. The LMH6572 has no internal ground  
reference. Single or split supply configurations are both pos-  
sible. The LMH6572 features very high speed channel  
switching and disable times. When disabled the LMH6572  
output is high impedance making MUX expansion possible  
by combining multiple devices.  
20109623  
FIGURE 2. Single Supply Application  
GAIN ACCURACY  
The gain accuracy of the LMH6572 is accurate to 0.5%  
(0.3% typical) and stable over temperature. The internal gain  
setting resistors, RF and RG, match very well. However, over  
process and temperature their absolute value will change.  
EVALUATION BOARDS  
National Semiconductor provides the following evaluation  
boards as a guide for high frequency layout and as an aid in  
device testing and characterization. Many of the datasheet  
plots were measured with these boards.  
20109622  
FIGURE 1. Typical Application  
Device  
Package  
Evaluation Board  
Part Number  
LMH730151  
VIDEO PERFORMANCE  
LMH6572  
TSSOP  
The LMH6572 has been designed to provide excellent per-  
formance with production quality video signals in a wide  
variety of formats such as HDTV and High Resolution VGA.  
Best performance will be obtained with back-terminated  
loads. The back termination reduces reflections from the  
transmission line and effectively masks transmission line  
and other parasitic capacitances from the amplifier output  
stage.Figure 1 shows a typical configuration for driving a 75.  
Cable. The output buffer is configured for a gain of 2, so  
using back terminated loads will give a net gain of 1.  
An evaluation board is shipped when a sample request is  
placed with National Semiconductor.  
MULTIPLEXER EXPANSION  
With the Enable or the Select pins putting the output stage  
into a high impedance state, several LMH6572’s can be tied  
together to form a larger input MUX. However, there is a  
slight loading effect on the active output caused by the  
off-channel feedback and gain set resistors, as shown in  
Figure 3 below. Figure 3 is assuming there are 4 LMH6572  
outputs (2 LMH6572 devices) similar to the schematic of  
Figure 4. With the internal resistors valued at 800Ω, the  
effect is rather slight. For the 4:1 MUX function shown in  
Figure 3, the gain error is only about -0.57 dB, or about 6%.  
SINGLE SUPPLY OPERATION  
The LMH6572 uses mid supply referenced circuits for the  
select and disable pins. In order to use the LMH6572 in  
single supply configuration it is necessary to use a circuit  
similar to Figure 2. In this configuration the logical inputs are  
compatible with high breakdown Open collector TTL, or  
Open Drain CMOS logic. In addition, the default logic state is  
reversed since there is a pull up resistor on those pins.  
Single supply operation also requires the input to be biased  
to within the common mode input range of roughly 2V from  
the mid supply point.  
www.national.com  
8
1...56789101112

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