ADV7197KS

Overview

The ADV7197KS is a multiformat HDTV encoder featuring three 11-bit digital-to-analog converters (DACs) in a 52-lead MQFP package. It accepts 10-bit YCrCb or RGB data at 74.25 MHz for SMPTE274M and SMPTE296M standards, supporting both 4:2:2 and 4:4:4 formats via an asynchronous timing mode. The device outputs analog YPrPb compliant with EIA-770.3 or RGB levels per RS-170/RS-343A. Operating on a single 5 V or 3.3 V supply, it draws 96 mA at 5 V and 46 mA at 3.3 V with a 74.25 MHz clock. Key specifications include a luma bandwidth of 13.5 MHz, chroma bandwidth of 6.75 MHz, and signal-to-noise ratio of 64 dB.

Feature Summary

• Integrates three high-speed video DACs with TTL-compatible inputs for simultaneous Y, Cr, and Cb processing.
• Includes an internal test pattern generator capable of producing cross-hatch and uniform color patterns for display calibration.
• Supports programmable Y/CrCb delay to align output signals relative to horizontal sync edges.
• Features selectable I2C filtering to reduce noise on the serial control interface.

Applications

• HDTV display devices
• HDTV projection systems
• Digital video systems
• High resolution color graphics

Procurement Notes

Verify the specific suffix 'KS' against the manufacturer's ordering guide to confirm the temperature range and package variant. Ensure the design supports the required 52-lead MQFP footprint and that power supply decoupling meets the specified current requirements for stable operation at 74.25 MHz.

Selection Notes

Select this component when designing systems requiring direct conversion of 10-bit digital HDTV streams to analog YPrPb or RGB. Consider the asynchronous timing mode if the input source does not strictly adhere to SMPTE274M or SMPTE296M standards. Evaluate the need for internal test patterns to simplify manufacturing testing procedures.

Part Context

The ADV7197 belongs to Analog Devices' family of multiformat HDTV encoders designed for high-definition video signal reconstruction. It serves as a bridge between digital video processors and analog display interfaces, enabling support for various high-definition standards through flexible input format handling and precise analog output generation.

Replacement Considerations

Consult the official datasheet for pin-compatible alternatives within the same product family. Verify that any substitute maintains the 52-lead MQFP package and supports the required 11-bit DAC resolution and 74.25 MHz operating frequency.