PCB Layout and Design Guide for CH7025/CH7026 TV/VGA Encoder Application Notes

PublishTime：2022-10-20

●The CH7025/CH7026 is a device targeting handheld and similar systems which accept a digital input signal, and encodes and transmits data through three 10-bit DACs. The device is able to encode the video signals and generate synchronization signals for NTSC and PAL standards. Analog RGB output and composite SYNC signal are also supported. The device accepts different data formats including RGB and YCrCb (e.g. RGB565, RGB666, RGB888, ITU656 like YCrCb, etc.). 16Mbit SDRAM can is embedded in package, so Frame rate conversion and Image Rotation are possible.
●This application note focuses only on the basic PCB layout and design guidelines for CH7025/CH7026 TV/VGA encoder. Guidelines in component placement, power supply decoupling, grounding, input/output signal interface are discussed in this document.
●The discussion and figures that follow reflect and describe connections based on the 80-pin LQFP and BGA package of the CH7025/CH7026. Please refer to the CH7025/CH7026 datasheet for the details of the pin assignments.

Brand of Product：	Chrontel
Part#：	CH7025 、 CH7026 More Part#
Product Category：	TV Encoder 、 VGA Encoder More
Application：	More
Data Type：	Application note & Design Guide More
Safety & Environment Standards：	More
Operating Temperature：	Please see the document for details
Qualification Grade：	More
Qualification Approval：	More
Package：	BGA;LQFP
Language：	English Chinese Chinese and English Japanese
Date of Creation：	12/11/2008
Version Number：	Rev.1.1.3
Data Encoding：	AN-109
Data Size：	454 KB

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