ADV7194KSTZ

Overview

The ADV7194KSTZ is a digital video encoder manufactured by Analog Devices Inc. It converts digital CCIR-601/656 4:2:2 YCrCb data into analog composite, S-video (Y/C), RGB, or YUV signals. The device features six 10-bit DACs and supports NTSC-M, NTSC-N, PAL N, PAL-B/D/G/H/I, and PAL-60 standards. It operates on 3.3 V or 5 V supplies with typical currents of 42 mA to 86 mA for the core circuit at 3.3 V and 54 mA to 120 mA at 5 V. The package is an 80-lead LQFP.

Feature Summary

• Supports multistandard video input including ITU-R BT.656 formats and progressive scan inputs.
• Integrates four-times oversampling with an internal 54 MHz PLL for high-quality signal processing.
• Includes programmable video controls such as digital noise reduction, gamma correction, and luma/chroma delay.
• Features a two-wire serial MPU interface compatible with I2C protocols.

Applications

• Professional DVD playback systems
• PC video and multimedia playback systems
• Progressive scan playback systems
• Professional studio equipment

Procurement Notes

Verify the specific suffix KSTZ corresponds to the 80-lead LQFP package and commercial temperature range when sourcing. Confirm that the component meets ESD sensitivity precautions during handling. Check current availability status as older generation video encoders may have limited stock or require alternative sourcing strategies from authorized distributors.

Selection Notes

Select this model when interfacing with devices requiring standard analog TV outputs like composite or S-video. Ensure the system design accommodates the 80-pin footprint and provides stable 3.3 V or 5 V power rails. Consider the internal PLL requirements and external clocking needs for the 27 MHz reference input.

Part Context

This component belongs to Analog Devices' professional video encoder lineup, designed for high-fidelity analog output from digital sources. It serves as a bridge between digital video processors and legacy analog display infrastructure, maintaining compatibility with established broadcast standards.

Replacement Considerations

The datasheet indicates register compatibility with the ADV7172 and ADV7173 models. Verify pinout and feature parity before substituting these parts in existing designs.

FAQ

What video input formats does the ADV7194 support?

It accepts ITU-R BT.656 4:2:2 YCrCb data in 8-, 10-, 16-, or 20-bit formats, as well as a 3x 10-bit YCrCb progressive scan format.

How is the device controlled?

Configuration is managed via a two-wire serial bidirectional port that is I2C-compatible and Fast I2C capable.

Does the chip include teletext capabilities?

Yes, it includes a dedicated teletext insertion port for PAL-WST and supports closed captioning data insertion.