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DS15BR400 PDF预览

DS15BR400

更新时间: 2024-10-29 11:14:03
品牌 Logo 应用领域
德州仪器 - TI 中继器
页数 文件大小 规格书
23页 624K
描述
具有预加重功能的 4 通道 LVDS 缓冲器/中继器

DS15BR400 数据手册

 浏览型号DS15BR400的Datasheet PDF文件第6页浏览型号DS15BR400的Datasheet PDF文件第7页浏览型号DS15BR400的Datasheet PDF文件第8页浏览型号DS15BR400的Datasheet PDF文件第10页浏览型号DS15BR400的Datasheet PDF文件第11页浏览型号DS15BR400的Datasheet PDF文件第12页 
DS15BR400, DS15BR401  
www.ti.com  
SNLS224G AUGUST 2006REVISED APRIL 2013  
Bypass capacitors should be placed close to VDD pins. Small physical size capacitors, such as 0402, X7R,  
surface mount capacitors should be used to minimize body inductance of capacitors. Each bypass capacitor is  
connected to the power and ground plane through vias tangent to the pads of the capacitor. An X7R surface  
mount capacitor of size 0402 has about 0.5 nH of body inductance. At frequencies above 30 MHz or so, X7R  
capacitors behave as low impedance inductors. To extend the operating frequency range to a few hundred MHz,  
an array of different capacitor values like 100 pF, 1 nF, 0.03 µF, and 0.1 µF are commonly used in parallel. The  
most effective bypass capacitor can be built using sandwiched layers of power and ground at a separation of 2–3  
mils. With a 2 mil FR4 dielectric, there is approximately 500 pF per square inch of PCB.  
The center dap of the WQFN package housing the DS15BR400 should be connected to a ground plane through  
an array of vias. The via array reduces the effective inductance to ground and enhances the thermal  
performance of the WQFN package.  
INPUT INTERFACING  
The DS15BR400 and DS15BR401 accept differential signals and allow simple AC or DC coupling. With a wide  
common mode range, the DS15BR400 and DS15BR401 can be DC-coupled with all common differential drivers  
(i.e. LVPECL, LVDS, CML). The following three figures illustrate typical DC-coupled interface to common  
differential drivers. Note that the DS15BR400 inputs are internally terminated with a 100Ω resistor while the  
DS15BR401 inputs are not, therefore the latter requires external input termination.  
LVDS  
Driver  
DS15BR400  
Receiver  
100W Differential T-Line  
OUT+  
IN+  
100W  
IN-  
OUT-  
Figure 11. Typical LVDS Driver DC-Coupled Interface to DS15BR400 Input  
CML3.3V or CML2.5V  
Driver  
V
CC  
DS15BR400  
Receiver  
50W  
50W  
100W Differential T-Line  
OUT+  
OUT-  
IN+  
IN-  
100W  
Figure 12. Typical CML Driver DC-Coupled Interface to DS15BR400 Input  
LVPECL  
Driver  
LVDS  
Receiver  
100W Differential T-Line  
IN+  
IN-  
OUT+  
100W  
OUT-  
150-250W  
150-250W  
Figure 13. Typical LVPECL Driver DC-Coupled Interface to DS15BR400 Input  
Copyright © 2006–2013, Texas Instruments Incorporated  
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Product Folder Links: DS15BR400 DS15BR401  

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