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DIGITAL AUDIO and MULTIMEDIA SOUND CODECs
AK4953A
Low Power 24-Bit 2ch ADC & 2ch DAC with ALC/Eq and MIC/HP/SPK-Amp
The AK4953A is a low power consumption 24bit stereo CODEC with a microphone, headphone and speaker amplifiers. The input circuits include a microphone amplifier and an ALC (Automatic Level Control) circuit, and the output circuits include a cap-less headphone amplifier and a speaker amplifier. It is suitable for portable application with recording/playback function. The integrated charge pump circuit generates a negative voltage and removes the output AC coupling capacitors. The speaker amplifier has a wide operating voltage range, which is from 0.9V to 5.5V, enabling a direct drive to batteries. The AK4953A is available in a small 36pin QFN (5x5mm 0.4mm pitch), utilizing less board space than competitive offerings.
AK4953A
  1. Applications: IC Recorders, PMPs
  2. Recording Function
    · Stereo Single-ended input with three Selectors
    · MIC Amplifier (+29dB/+26dB/+23dB/+20dB/+16dB/+12dB/0dB)
    · Digital ALC (Automatic Level Control)
    (Setting Range: +36dB ~ -54dB, 0.375dB Step)
    · ADC Performance: S/(N+D): 82dB, DR, S/N: 88dB (MIC-Amp=+20dB)
    S/(N+D): 85dB, DR, S/N: 96dB (MIC-Amp=0dB)
    · Wind-noise Reduction Filter
    · 5 Band Notch Filter
    · Digital MIC Interface
  3. Playback Function
    · Digital De-emphasis Filter (tc=50/15micros, fs=32kHz, 44.1kHz, 48kHz)
    · Digital ALC (Automatic Level Control)
    (Setting Range: +36dB ~ -54dB, 0.375dB Step)
    · Digital Volume Control (+12dB ~ -115dB, 0.5dB Step, Mute)
    · Capacitor-less Stereo Headphone Amplifier
    - HP-Amp Performance: S/(N+D): 80dB@24mW, S/N: 96dB
    - Output Power: 24mW@16omega
    - Pop Noise Free at Power-ON/OFF
    · Mono Speaker-Amplifier
    - SPK-Amp Performance: S/(N+D): 70dB@150mW, 60dB@250mW, S/N: 95dB
    - BTL Output
    - Output Power: 400mW@8omega (SVDD=3.3V)
    100mW@8omega (SVDD=1.5V)
    · Beep Generator
  4. Power Management
  5. Master Clock:
    (1) PLL Mode
    · Frequencies: 11.2896MHz, 12MHz, 13.5MHz, 24MHz, 27MHz (MCKI pin)
    32fs or 64fs (BICK pin)
    (2) External Clock Mode
    · Frequencies: 256fs, 384fs, 512fs or 1024fs (MCKI pin)
  6. Output Master Clock Frequencies: 32fs/64fs/128fs/256fs
    · PLL Slave Mode (BICK pin): 7.35kHz ~ 96kHz
    · PLL Slave Mode (MCKI pin): 7.35kHz, 8kHz, 11.025kHz, 12kHz, 14.7kHz,
    16kHz, 22.05kHz, 24kHz, 29.4kHz, 32kHz,
    44.1kHz, 48kHz,64kHz, 88.2kHz, 96kHz
    · PLL Master Mode: 7.35kHz, 8kHz, 11.025kHz, 12kHz, 14.7kHz, 16kHz,
    22.05kHz ,24kHz, 29.4kHz, 32kHz, 44.1kHz, 48kHz,
    64kHz, 88.2kHz, 96kHz
    · EXT Master/Slave Mode: 7.35kHz ~ 96kHz (256fs), 7.35kHz ~ 48kHz (384fs),
    7.35kHz ~ 48kHz (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: 24bit MSB justified, 16/24bit I2S
    · DAC: 24bit MSB justified, 16bit LSB justified, 24bit LSB justified, 16/24bit I2S
  10. Ta = -30 ~ 85°C (SPK-Amp = OFF)
    Ta = -30 ~ 70°C (SPK-Amp = ON)
  11. Power Supply:
    · Analog Power Supply (AVDD): 2.85 ~ 3.5V
    · Digital Power Supply (DVDD): 1.6 ~ 2.0V
    · Digital I/O Power Supply (TVDD): DVDD ~ 3.5V
    · Speaker Power Supply (SVDD): 0.9 ~ 5.5V
  12. Package: 36pin QFN (5 x 5mm, 0.4mm pitch)
  13. Evaluation Board: AKD4953A
PDF
Download		 PDF Data Sheets
Rev. MS1252-E-00 2010/10
PDF : 931KB / 96pages		    
AK4953A BLOCK DIAGRAM

AK4953A BLOCK DIAGRAM

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