The AK4702 is an I²C controlled audio-and-video signal switch matrix with stereo audio DAC, designed for dual SCART applications, included in the Audio4homeTM AKM audio product family. The AK4702 video path features a multiplexer for the AC-coupled inputs with clamp/bias, and DC-coupled outputs driving up to 3Vpp.  The video input stage includes a signal monitor that supports automatic start-up and sleep functions.  The AK4702 audio path features a multiplexer, a mixer of DAC-out and AUX-in, and a stereo-to-mono mix-down, with output drive up to 2Vrms.  The DAC output stage integrates a combination filter of SCF (Switched Cap Filter) and CTF (Continuous Time Filter), which maximizes clock jitter tolerance and requires no external filter parts. The AK4702 enables easy design and offers cost savings for basic SCART applications.

Audio Path and Switching
 - Audio inputs and outputs including:

  - One digital audio interface for stereo DAC with PGA (-6/0/+2.44 dB)

  - One monaural input and two stereo inputs

  - Volume by +6 to -60dB for TV out and MONO out

  - Mixing by DAC and monaural AUX-in

  - Mixing stereo down to mono for TV out and MONO out

  - Single-ended outputs enabling to drive 2Vrms

 - Hi audio performance:
   THD+N: -86dB(typ.), DYR: 96dB(typ.)
 - Pop-noise-free Architecture in power on/off sequence
Audio D/A Converter
 - Sampling Rate: 8K to 50KHz
 - Audio data interface format: 18-bit Left justified, 18/16-bit Right justified or I2S
 - Master clock: 256fs, 384fs
 - Digital Signal Function:
  - De-emphasis (32K, 44.1K, 48KHz)
  - Soft muting
 - Analog Dynamic Performance:
  THD+N  -86dB(typ.), Dynamic Range 96dB (typ.)
Video Path and Switching
 - Video inputs including:

  - Six inputs as CVBS/Y, Y, R/C, C, G/CVBS, and B to receive ENC output signals

  - Four inputs as CVBS/Y, R/C, G, and B to receive VCR output signals

  - A input as CVBS to receive TV output signal

  - Clamp and Bias supporting AC-coupling

 - Video outputs including:

  - A output as CVBS for TV

  - Three outputs with PGA (0/1/2/3 dB) for R/C, G, and B for TV

  - A output as CVBS for RF module

  - Two outputs as CVBS/Y and C for connection to VCR

  - Wide-band 6dB output buffer amp to drive 3Vpp into 75W, supporting DC-coupling

 - Input signal monitor and automatic start-up and sleep action
 - Slow/Fast Blanking Control based on the IEC933-1 requirement
 - Programmable functions by I²C
 - Power Supply: 5V +/- 5% and 12V +/- 5%
 - Package: Small 48 pin LQFP

 - DVB-S/T/C Set-Top-Boxes
 - TVs
 - DVDs

 - VCRs

AKD4702