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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 ...More

AD723:  2.7 V to 5.5 V RGB-to-NTSC/PAL Encoder with Load Detect and Input Termination Switch

Product Description

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.

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EVALUATION BOARDS & DEVELOPMENT KITS

  • 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
  • # DAC: n/a
  • Resolution (Bits): n/a
  • Standard Definition: X
  • Component RGB/YPbPr: RGB only
  • CVBS/S-Video: X
  • I/O Supply (V): 2.7 to 5V
  • A & D Core Supply (V): 3.3 or 5V
  • Package: 28-Lead TSSOP

Functional Block Diagram for AD723

Similar Products

arrow View Full Interactive Product Selection Table
Part# # DAC Resolution (Bits) Input Data Resolution Max Oversampling (MHz) Standard Definition Prog Scan HDTV Component RGB/YPbPr CVBS/S-Video Price* (1000-4999)
AD723 n/a n/a - - X - - RGB only X $3.81
AD724 n/a n/a - - X - - RGB only X $6.15
AD725 n/a n/a - - X - - RGB only X $4.61
ADV7170 4 10 8 27 X - - X X -
ADV7171 4 10 8 27 X - - X X $5.46
ADV7172 6 10 8 27 X - - X X -
ADV7173 6 10 8 27 X - - X X $5.74
ADV7194 6 10 10 54 X X - X X $21.22
ADV7304A 6 14 - - - - - - - -
ADV7324 6 14 - - X X X - X -
ADV7340 6 12 10 297 X X X X X -
ADV7341 6 12 10 297 X X X X X $14.17
ADV7342 6 11 8 297 X X X X X -
ADV7343 6 11 8 297 X X X X X $7.74
ADV7344 6 14 10 297 X X X X X -
ADV7390 3 10 8 297 X X X X X -
ADV7391 3 10 8 297 X X X X X $4.05
ADV7392 3 10 10 297 X X X X X -
ADV7393 3 10 10 297 X X X X X $4.40
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* The pricing listed here is provided only for budgetary purposes as recommended list price in U.S. Dollars in the United States ex factor per unit for the stated volume. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
** Pricing is currently unavailable. Click on the product number to see the Product Page for additional information.

Pricing, Packaging & Availability

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For detailed drawings and chemical composition please consult our  Package Site

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Price
The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

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Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.

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Due to environmental concerns, ADI offers many of our products in lead-free versions. For more information about lead-free parts, please consult our Pb (Lead) free information page.

View PCN
This is the list of Product Change Notifications (PCN) published on the web for this model. Click on the link to access PCN Information.Only select pre-2009 PCN�s are available on-line. To obtain a pre-2009 PCN, contact your ADI Sales Rep. For more information on ADI's PCN process, please visit our PCN Policy Statement page

*The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
**Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.