Part # AD723 datasheet

Part Manufacturer: Analog Devices

Analog Devices

Part Description: . AD723

Part Details:

a2.7 V to 5.5 V RGB-to-NTSC/PAL Encoder with Load Detect and Input Termination Switch AD723 FEATURES or combined for composite video (CV). All outputs are avail- Low Cost, Fully Integrated Solution for NTSC/PAL able separately and optimized for driving 75 loads. Active Composite and Y/C (S-Video) Outputs termination is used for lower power consumption. Current Output Drives 75 Loads A smart load detect feature powers down unused outputs and DC-Coupled: Supports TV Load Detect can be used to monitor the continuing presence or absence of No Large AC-Coupling Capacitors at Output an external TV. This enables plug-and-play operation. In addition, Self-Power-Down of Unloaded Output Drivers Triple Switch to Enable RGB Termination a logic controlled triple switch at the input solves the applica- Integrated Delay Line and Auto-Tuned Filters tions problem of differing load conditions when an RGB monitor Y-Trap to Eliminate Cross Color Artifacts is disconnected. When an RGB monitor is not present, the R, 3 V Supply Operation: Low Power G, and B terminations are enabled by the user. This solution < 100 mW: Composite Active (Typical) ensures no loss of video bandwidth when the RGB monitor is < 150 mW: S-Video Active (Typical) in operation. <1 A: Power-Down Current In PC applications, flicker filter support is provided by the APPLICATIONS graphics controller, which has direct access to memory. Under- TV Out for Personal Computers/Laptops scan compensation, necessary for uses other than video or Digital Cameras DVD, is supported through choice of RGB output clocks and Set-Top Boxes sync intervals. Video Games An optional luminance trap (YTRAP) provides a means of Internet Appliances reducing cross color artifacts due to subcarrier frequency infor- PRODUCT DESCRIPTION mation in the Y signal. The AD723 is a low cost RGB-to-NTSC/PAL encoder that The AD723 is available in a 28-lead TSSOP package and is converts analog red, green, and blue color component signals capable of operation from supplies of 2.7 V to 5.5 V. into their corresponding luminance and chrominance signals fordisplay on an NTSC or PAL television. Luminance (Y) andChrominance (C) signals are available individually for S-video, FUNCTIONAL BLOCK DIAGRAM CURRENT OUTPUT DRIVERS 8FSC CLK WITH SMART LOAD DETECT TRIPLE INPUT TERMINATION

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AD723.pdf Datasheet