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DIGITAL AUDIO and MULTIMEDIA SOUND CODECs
AK4645A
Low Power 2ch ADC & 2ch DAC with ALC/Eq and MIC/HP-Amp
The AK4645A is a stereo CODEC with a built-in Microphone-Amplifier and Headphone-Amplifier. The AK4645A features analog mixing circuit that allows easy interfacing in mobile phone and portable A/V player designs. The AK4645A is available in a 32pin QFN (4mm 4mm), 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): 65dB@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:
    · External Clock Mode
    - Frequencies: 256fs, 384fs, 512fs or 1024fs (MCKI pin)
  6. Sampling Rate:
    · EXT Master/Slave Mode:
    7.35kHz ~ 48kHz (256fs), 7.35kHz ~ 48kHz (384fs),
    7.35kHz ~ 26kHz (512fs), 7.35kHz ~ 13kHz (1024fs)
  7. microP I/F: 3-wire serial, I2C Bus (Ver 1.0, 400kHz Fast-mode)
  8. Master/Slave mode
  9. 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
  10. Ta = -30 ~ 85°C
  11. 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)
  12. Package: 32pin QFN (4mm 4mm, 0.4mm pitch)
  13. Register Compatible with AK4644
  14. Evaluation Board: AKD4645A
PDF
Download		 PDF Data Sheets
Rev. MS0986-E-00 2008/07
PDF : 940KB / 85pages		 PDF Evaluation Board Manual
Rev. KM094901 2009/10
PDF : 1638KB / 53pages
AK4645A BLOCK DIAGRAM

AK4645A BLOCK DIAGRAM

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