ADV7191KST

Overview

The ADV7191KST is a video encoder IC from Analog Devices Inc. It features six high-quality 10-bit video DACs and supports multistandard video input and output. The device utilizes 4x oversampling with an internal 54 MHz PLL for operation. It accepts ITU-R BT.656/601 8-bit or 16-bit YCrCb data in 4:2:2 format. Supply voltage ranges are 3.15 V to 3.45 V (typical 3.3 V) and 4.75 V to 5.25 V (typical 5 V). The package is a 64-lead LQFP.

Feature Summary

• Programmable video control including digital noise reduction, gamma correction, and luma/chroma delay.
• Supports multiple analog outputs such as composite video, S-video, component YUV, and RGB.
• Includes advanced filtering like the Luma SSAF and teletext insertion capabilities.

Applications

• DVD playback systems
• PC video playback systems
• Multimedia playback systems

Procurement Notes

Verify the specific ordering suffix KST corresponds to the 64-lead Quad Flatpack package and the 0°C to 70°C temperature range. Confirm that the component meets RoHS compliance standards required for your assembly process. Ensure proper ESD handling precautions are observed during storage and installation due to the sensitivity of the device.

Selection Notes

Select this model when a multistandard video encoder with six independent DAC outputs is required. It is suitable for designs needing support for both NTSC and PAL formats with programmable video controls. Consider the 64-lead LQFP package dimensions and thermal resistance when designing the PCB layout for adequate heat dissipation.

Part Context

This component belongs to the ADV7190/ADV7191 family of video encoders from Analog Devices. It shares functional similarities with the ADV7190 but lacks the Macrovision Rev 7.1 anticopy feature found in the ADV7190 variant. Both devices utilize the same 64-lead LQFP package and core architecture.

Replacement Considerations

The ADV7190KST is a compatible alternative within the same family. Note that the ADV7190 includes Macrovision Rev 7.1 support, which is absent in the ADV7191. Verify register compatibility if migrating between these two specific part numbers.

FAQ

What clock frequency is required for standard operation?

A stable 27 MHz reference clock is required for standard operation. Square pixel mode can use 24.5454 MHz for NTSC or 29.5 MHz for PAL.

Does the ADV7191 support Macrovision protection?

No, the ADV7191 does not include Macrovision Rev 7.1 support. This feature is available only in the ADV7190 variant.

How is the full-scale amplitude of the video signals controlled?

Full-scale amplitudes are controlled by connecting resistors to the RSET1 and RSET2 pins. A 1200 Ohm resistor connected from these pins to ground is typically used.