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EAGLE Library Object
|Uploaded by:||Juergen Messerer|
|Remarks:||This library is a part of the archive file m-pad-2.1.zip|
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|Description:||Analog Devices AD723 2.7 V to 5.5 V RGB-to-NTSC/PAL Encoder with Load Detect and Input Termination Switch|
The AD723 is a low cost RGB-to-NTSC/PAL encoder that converts analog red, green, and blue color component signals
into their corresponding luminance and chrominance signals for display on an NTSC or PAL television. Luminance (Y) and
Chrominance (C) signals are available individually for S-video, or combined for composite video (CV). All outputs are available
separately and optimized for driving 75 Ohm loads. Active termination is used for lower power consumption.
A smart load detect feature powers down unused outputs and can be used to monitor the continuing presence or absence of
an external TV. This enables plug-and-play operation. In addition, a logic controlled triple switch at the input solves the applications
problem of differing load conditions when an RGB monitor is disconnected. When an RGB monitor is not present, the R,
G, and B terminations are enabled by the user. This solution ensures no loss of video bandwidth when the RGB monitor is
In PC applications, flicker filter support is provided by the graphics controller, which has direct access to memory. Underscan
compensation, necessary for uses other than video or DVD, is supported through choice of RGB output clocks and
An optional luminance trap (YTRAP) provides a means of reducing cross color artifacts due to subcarrier frequency information
in the Y signal. The AD723 is available in a 28-lead TSSOP package and is capable of operation from supplies of 2.7 V to 5.5 V.
Features: Low Cost, Fully Integrated Solution for NTSC/PAL Composite and Y/C (S-Video) Outputs Current Output Drives 75 Loads DC-Coupled: Supports TV Load Detect No Large AC-Coupling Capacitors at Output Self-Power-Down of Unloaded Output Drivers Triple Switch to Enable RGB Termination Integrated Delay Line and Auto-Tuned Filters Y-Trap to Eliminate Cross Color Artifacts 3 V Supply Operation: Low Power Less then 100 mW: Composite Active (Typical) Less then 150 mW: S-Video Active (Typical) Less then 1uA: Power-Down Current Applications: TV Out for Personal Computers/Laptops Digital Cameras Set-Top Boxes Video Games Internet Appliances Please send any comments to: email@example.com