ADV7197KSZ

Overview

The ADV7197KSZ 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 in 4:2:2 or 4:4:4 formats at clock frequencies of 74.25 MHz or 74.1758 MHz. The device outputs analog YPrPb compliant with EIA-770.3 or RGB levels per RS-170/RS-343A standards. Operating on a single 5 V or 3.3 V supply, it draws 102 mA at 5 V and 46 mA at 3.3 V with all DACs active. Key specifications include an integral nonlinearity of 1.5 LSB, differential nonlinearity of 0.9 to 2.0 LSB, and a luma bandwidth of 13.5 MHz.

Feature Summary

• Supports multiformat HDTV encoding for SMPTE274M and SMPTE296M standards using dedicated pixel input ports.
• Integrates programmable internal test pattern generator with color control capabilities for system verification.
• Provides individual DAC on/off control and adjustable Y/C delay settings for precise signal timing alignment.
• Includes chroma 4:2:2 to 4:4:4 Super Sampling Anti-Folding Filters (SSAFs) to prevent signal folding.

Applications

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

Procurement Notes

Verify the specific suffix 'KSZ' against official Analog Devices documentation to confirm temperature range and packaging details. Ensure compatibility with the required 52-lead MQFP footprint and validate power supply requirements for the target operating voltage before integration.

Selection Notes

Select this component when designing systems requiring simultaneous conversion of high-definition video signals to analog YPrPb or RGB outputs. Consider the 11-bit resolution and low differential nonlinearity for applications demanding high image fidelity. Verify that the host processor supports the necessary I2C interface and pixel clock frequencies for proper synchronization.

Part Context

The ADV7197 belongs to Analog Devices' family of high-speed video encoders designed for professional broadcast and display applications. It serves as a bridge between digital video sources and analog display interfaces, enabling the reconstruction of high-definition signals from digital bitstreams.

Replacement Considerations

Consult official Analog Devices documentation for confirmed substitute part numbers. Do not assume functional equivalence with other video encoder models without verifying pinout, electrical specifications, and register compatibility.

FAQ

What input data formats does the ADV7197 support?

The device accepts 10-bit YCrCb in 4:2:2 or 4:4:4 format, and 10-bit RGB in 4:4:4 format.

How is the output standard configured?

Output levels are selected via Mode Register 0 to comply with either EIA-770.3 (YPrPb) or RS-170/RS-343A (RGB) standards.

What is the function of the ALSB pin?

The ALSB pin controls the I2C filter; setting it high reduces input bandwidth for noise reduction, while setting it low increases bandwidth for high-speed transfers.