AD723 - ADI

The pictures are for reference only, and the specific specifications can be found in the product manual.

Part No

AD723
Manufacturer

ADI
ChipWorker Part#

CW480102456
Description

2.7V to 5.5V RGB-to-NTSC/PAL Encoder with Load Detect and Input Termination Switch
Documentation

Datasheet

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AD723 Specifications

Attribute	Attribute Value

Part Number	AD723
Manufacturer	ADI
ChipWorker Part#	CW480102456
Documentation	Datasheet
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Product Lifecycle Status	Active

Product Description

Product Details
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 Ω 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 operation.
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 sync intervals.
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 and Benefits
Low cost, fully integrated solution for NTSC/PAL
Composite and Y/C (S-video) outputs
Current output drives 75 Ω 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
< 100 mW: composite active (typical)
< 150 mW: S-video active (typical)
<1 µA: power down current

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