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DIGITAL AUDIO and MULTIMEDIA SOUND CODECs
AK4645
Low Power 2ch ADC & 2ch DAC with ALC/Eq and MIC/HP-Amp
The AK4645 is a stereo CODEC with a built-in Microphone-Amplifier and Headphone-Amplifier. The AK4645 features analog mixing circuits and PLL that allows easy interfacing in mobile phone and portable A/V player designs. The AK4645 is available in a 32pin QFN, utilizing less board space than competitive offerings.
  1. Applications: Mobile Phone, PDA, PMP and Portable Navigation Device
  2. Recording Function
    · 4 Stereo Input Selector
    · Stereo Mic Input (Full-differential or Single-ended)
    · Stereo Line Input
    · MIC Amplifier (+32dB/+26dB/+20dB or 0dB)
    · Digital ALC (Automatic Level Control)
    (+36dB ~ -54dB, 0.375dB Step, Mute)
    · ADC Performance: S/(N+D): 83dB, DR, S/N: 86dB (MIC-Amp=+20dB)
    S/(N+D): 88dB, DR, S/N: 95dB (MIC-Amp=0dB)
    · Wind-noise Reduction Filter
    · Stereo Separation Emphasis
    · Programmable EQ
  3. Playback Function
    · Digital De-emphasis Filter (tc=50/15micros, fs=32kHz, 44.1kHz, 48kHz)
    · Bass Boost
    · Soft Mute
    · Digital Volume (+12dB ~ -115.0dB, 0.5dB Step, Mute)
    · Digital ALC (Automatic Level Control)
    (+36dB ~ -54dB, 0.375dB Step, Mute)
    · Stereo Separation Emphasis
    · Programmable EQ
    · Stereo Line Output
    - Performance: S/(N+D): 88dB, S/N: 92dB
    · Stereo Headphone-Amp
    - S/(N+D): 70dB@7.5mW, S/N: 90dB
    - Output Power: 70mW@16omega (HVDD=5V), 62mW@16omega (HVDD=3.3V)
    - Pop Noise Free at Power ON/OFF
    · Analog Mixing: 4 Stereo Input
  4. Power Management
  5. Master Clock:
    (1) PLL Mode
    · Frequencies:
    - MCKI pin: 11.2896MHz, 12MHz, 12.288MHz, 13MHz, 13.5MHz,
    19.2MHz, 24MHz, 26MHz, 27MHz
    - LRCK pin: 1fs
    - BICK pin: 32fs or 64fs
    (2) External Clock Mode
    · Frequencies: 256fs, 512fs or 1024fs (MCKI pin)
  6. Output Master Clock Frequencies: 32fs/64fs/128fs/256fs
  7. Sampling Rate:
    · PLL Slave Mode (LRCK pin): 7.35kHz ~ 48kHz
    · PLL Slave Mode (BICK pin): 7.35kHz ~ 48kHz
    · PLL Slave Mode (MCKI pin):
    8kHz, 11.025kHz, 12kHz, 16kHz, 22.05kHz, 24kHz, 32kHz, 44.1kHz, 48kHz
    · PLL Master Mode:
    8kHz, 11.025kHz, 12kHz, 16kHz, 22.05kHz, 24kHz, 32kHz, 44.1kHz, 48kHz
    · EXT Master/Slave Mode:
    7.35kHz ~ 48kHz (256fs), 7.35kHz ~ 26kHz (512fs), 7.35kHz ~ 13kHz (1024fs)
  8. microP I/F: 3-wire serial, I2C Bus (Ver 1.0, 400kHz High Speed Mode)
  9. Master/Slave mode
  10. Audio Interface Format: MSB First, 2’s complement
    · ADC : 16bit MSB justified, I2S, DSP Mode
    · DAC : 16bit MSB justified, 16bit LSB justified, 16-24bit I2S, DSP Mode
  11. Ta = -30 ~ 85°C
  12. Power Supply:
    · AVDD, DVDD: 2.6 ~ 3.6V (typ. 3.3V)
    · HVDD: 2.6 ~ 5.25V (typ. 3.3V/5.0V)
    · TVDD (Digital I/O): 1.6 ~ 3.6V (typ. 3.3V)
  13. Package: 32pin QFN (5mm x 5mm, 0.5mm pitch)
  14. Register Compatible with AK4644
  15. Evaluation Board: AKD4645
PDF
Download		 PDF Data Sheets
Rev. MS0543-E-00 2006/09
PDF : 792KB / 96pages		 PDF Evaluation Board Manual
Rev. KM084501 2009/10
PDF : 857KB / 40pages
AK4645 BLOCK DIAGRAM

AK4645 BLOCK DIAGRAM

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