Description

The AK8851VQ is an integrated chip that decodes NTSC, PAL, SECAM composite and S-Video signals. It features a digital output in Y, Cb, Cr signal format that complies with ITU-R BT.601 and ITU-R BT.656 specifications. The chip has a synchronized internally generated pixel clock at a rate of 27 MHz. Additionally, it provides external accessibility to Closed Caption, VBID, and WSS information encoded on the input video signal.

Specifications and features

• NTSC-M, NTSC-4.43/PAL-B, D, G, H, I, N, Nc, M, 60/SECAM Composite signals and S-Video signal decoding function
• On-chip dual 10 Bit ADCs (27 MHz operation)
• Built-in PLLs for input-signal-synchronized clock generation (Line-locked PLL and Frame-locked PLL)
• On-chip Programmable Gain Amp (PGA), ranging from 0 dB to 12 dB
• Auto Color Control (ACC)
• Auto Gain Control (AGC)
• Automatic input signal distinction function
• Adaptive 3-/5-line (NTSC/PAL) YC Separation
• Phase compensation function for PAL signal decoding
• ITU-R BT.656 format output (4:2:2 8 Bit parallel output with EAV / SAV)/ 16-Bit output is also available
• NTSC Closed Caption signal decoding function
• VBID (CGM-A) Program condition decoding function (CRCC decode)
• WSS Program condition decoding function
• VBI slicer function
• Macrovision Certification
• Power down function
• 6 - channel Analog inputs
• I2C Control
• 3.3 V +/- 10 % CMOS
• 100 Pin LQFP package

Application Scenarios

The AK8851VQ is commonly used in electronic devices that require the decoding of composite and S-Video signals. It can be used in televisions, video players, and other audiovisual equipment.

Comparison

• Decodes a variety of composite and S-Video signals
• On-chip dual ADCs for high-quality conversion
• Built-in PLLs for synchronized clock generation
• Programmable Gain Amp for customizable signal amplification
• Includes various functions such as Auto Color Control and Auto Gain Control
• Supports ITU-R BT.656 format output and other output options
• Provides decoding functions for Closed Caption, VBID, and WSS signals
• Macrovision Certification for content protection
• Wide operating voltage range of 3.3 V +/- 10% CMOS

• The AK8851VQ is limited to 10-bit ADCs, which may result in lower resolution compared to higher bit ADCs
• Only available in a 100 Pin LQFP package