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Not Recommed for New Designs
AK4705
A/V Switch with Audio DAC and component video filter for STB Applications
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  1. DAC
    - Sampling Rates Ranging from 32kHz to 50kHz
    - 64dB High Attenuation 8x FIR Digital Filter
    - 2nd Order Analog LPF
    - On Chip Buffer with Single-Ended Output
    - Digital De-Emphasis for 32k, 44.1k and 48kHz Sampling
    - l/F Format: 24bit MSB Justified, 12s, 18ll6bit LSB Justified
    - Master Clock: 256fs, 384fs
    - High Tolerance to Clock Jitter
  2. Analog SwitcheS for SCART
    <Audio Section>
    - THD+N: -86dB (@2Vrms)
    - Dynamic Range: 96dB (@2Vrms)
    - Stereo Analog Volume with Pop-noise Free Circuit
       (+6dB to -60dB & Mute)
    - Analog Inputs
       Two Stereo Inputs (TV&VCR SCART)
       One Stereo Input (Changeover to Internal DAC)
    - Analog Outputs
       Two Stereo Outputs (TV. VCR SCART)
       One Mono Output (Modulator)
    - Pop Noise Free Circuit for Power OnlOff
  3. Video Section
    - Integrated LPF: -40dB@27MHz
    - 750hm Driver
    - 6dB Gain for Outputs
    - Adjustable Gain
    - Four CVBS/Y Inputs (ENCX2, TV, VCR),
       Three CVBS/Y Outputs (RF, TV, VCR)
    - Three R/C Inputs (ENCX2, VCR),
       Two R/C outputs (TV, VCR)
    - Bi-Directional Control for VCR-RedlChroma
    - Two G and B Inputs (ENC, VCR),
       One G and B Outputs (TV)
    - Y/Pb/Pr Option (to 6MHz)
    - VCR Input Monitor
       Loop-Through Mode for Standby
       Auto-Startup Mode for Power Saving
       SCART Pin#16(Fast Blanking), Pin#8(Slow Blanking) Control
  4. AK4702104 Software Compatible
  5. Power Supply
    - 5V+/-5'/. and 1 2V+/-5'/.
    - Low Power Dissipation / Low Power Standby Mode
  6. Package
    - Small 48pin LQFP
AK4705 BLOCK DIAGRAM
AK4705 Diagram
AK4705
AK4705
  • For New design:

    AK4705A