Cap-less AV Line Driver

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The AK4712 is a High Definition A/V cap-less line driver. The AK4712 integrates the audio line driver, SD/HD video filters and video drivers. Its A/V outputs are Ground-referenced and eliminate the need for large A/V DC-blocking capacitors with a built-in Charge-pump circuit. The AK4712 achieves excellent A/V performance by single 3.3V power supply. The AK4712 is ideal for a wide range of consumer HD applications, such as portable A/V players, set-top boxes, and Blu-ray/DVD player systems. The AK4712 is offered in a space saving 28pin QFN package.

Key Features

Audio section

• THD+N: -102dB (@2Vrms)

• Dynamic Range: 108dB (@2Vrms, A-weighted)

• Full Differential (or Single-ended) input for Decoder DAC

• Stereo Output for CINCH (2Vrms)

• Ground-Referenced Output Eliminates

DC-Blocking Capacitor and Mute Circuit

Video section

• Integrated LPF

SD: –40dB@27MHz

HD: –36dB@74.25MHz ,–40dB@54MHz or 27MHz selectable

• 6dB Gain for Outputs

• 4ch 75ohm driver

3ch for HD: Y/Pb/Pr

1ch for CINCH: CVBS

Power supply

• 3.3V ±5%

• Low Power Standby Mode


• 28pin QFN (0.4mm pitch)

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Block Diagram

Block Diagram

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