AK8856VN

Overview

The AK8856VN is a digital video decoder that converts NTSC and PAL composite video signals into ITU-R BT.601 compatible Y, Cb, and Cr data. It features an integrated 10-bit ADC sampling at 24.5454 MHz or 27 MHz, with selectable output resolutions including VGA (interlaced), CIF, QVGA, QCIF, and 601 formats. The device supports variable frame rates and includes adaptive AGC, ACC, and Y/C separation functions. It operates on core voltages of 1.65 to 1.8 V and interface voltage up to 3.6 V, housed in a 48-pin QFN package.

Feature Summary

• Integrated 10-bit analog-to-digital converter with programmable gain amplifier
• Supports multiple output resolutions and variable frame rate scaling
• Includes closed caption, VBID, and WSS decoding capabilities
• Features adaptive automatic gain control and color control

Applications

• Digital video signal processing systems
• Video surveillance equipment
• Consumer electronics requiring composite video input

Procurement Notes

Verify the specific ordering suffix VN against the manufacturer's current datasheet to confirm the package type and I/O voltage specifications. Ensure the host system provides the required 27 MHz clock source or crystal connections as specified in the electrical characteristics. Confirm power supply sequencing requirements for PVDD, AVDD, and DVDD during integration.

Selection Notes

Select this component when a single-chip solution for NTSC/PAL composite decoding is required. Consider the available output resolutions and the need for embedded VBI data extraction. Evaluate the power supply constraints, specifically the separate core and interface voltage requirements, against the target system design.

Part Context

The AK8856VN belongs to the AK8856 family of digital video decoders from Asahi Kasei Microdevices. This series is designed for converting analog composite video into digital component formats. The VN suffix denotes the 48-pin QFN package variant, distinct from the FBGA option.

Replacement Considerations

Consult the manufacturer's official documentation for direct pin-compatible alternatives. Verify functional equivalence regarding supported video standards and output interfaces before substitution.