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BT861KRF 参数 Datasheet PDF下载

BT861KRF图片预览
型号: BT861KRF
PDF下载: 下载PDF文件 查看货源
内容描述: 多端口的YCrCb到NTSC / PAL / SECAM数字视频编码器 [Multiport YCrCb to NTSC / PAL / SECAM Digital Video Encoder]
分类和应用: 商用集成电路编码器
文件页数/大小: 111 页 / 1232 K
品牌: CONEXANT [ CONEXANT SYSTEMS, INC ]
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Bt860/861  
4.0 Applications  
Multiport YCrCb to NTSC/PAL /SECAM  
4.1 PC Board Considerations  
4.1.3 Device Decoupling  
For optimum performance, all decoupling capacitors should be located as close as  
possible to the device, and the shortest possible leads should be used to reduce the  
lead inductance. Chip capacitors are recommended for minimum lead inductance.  
Radial lead ceramic capacitors can be substituted for chip capacitors and are  
better than axial lead capacitors for self-resonance. Values chosen have  
self-resonance above the pixel clock frequency.  
4.1.4 Power Supply Decoupling  
The best power supply performance is obtained with 0.1 µF ceramic capacitors  
decoupling each group of power pins to ground. Place the capacitors as close as  
possible to the device power pins and ground pins and connect with short, wide  
traces. Table 4-1 is a typical parts list.  
The 47 µF capacitor illustrated in Figure 4-1 is for low-frequency power  
supply ripple; the 0.1 µF capacitors are for high-frequency power supply noise  
rejection.  
A linear regulator is recommended to filter the analog power supply if the  
power supply noise is excessive. This is especially important when using a  
switching power supply.  
Figure 4-2. Recommended Crystal Circuit  
Bt860/861  
C19  
XTI  
R1  
XTAL  
XTO  
C20  
NOTE(S): For typical parts list, see Table 4-1.  
861_039  
D860DSA  
Conexant  
4-3  
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