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DIGITAL AUDIO DACs
AK4373
Low Power 24-Bit DAC with HP/SPK-Amp
The AK4373 is a low power stereo 24bit DAC with an integrated stereo headphone amplifier and a monaural speaker driver. It can be used for a variety of portable audio and media player applications, including game consoles, dedicated headphone drivers, personal navigation devices, and portable media players. The Headphone output drivers can be configured for three unique use cases: mono speaker driver or single-ended ac-coupled headphones which can be used as stereo line-out, DC-coupled BTL headphones and Pseudo Cap-less. The AK4373 operates off of a low-voltage power supply, ranging from 2.2V to 3.6V. The output amplifiers have an optional 4.0V power supply. The device is packaged in a space-saving 32-pin QFN package.

AK4373
  • Applications: Mobile Phones, Smart Phones and Portable Music Players
  • Sampling Rate: 8 kHz ~ 48 kHz
  • 8-times Over sampling Digital Filter
  • SCF with high tolerance to clock jitter
  • Stereo Headphone Amplifier
    45mW output (Single-ended mode) into 16omega3.3V
    SNR: 96dB
    90mW output (Differential mode) into 32omega 3.3V
    SNR: 96dB
    45mW output (Pseudo cap-less mode) into 16omega3.3V
    SNR: 86dB
    Pop-noise free at power-up and reset
  • Stereo Lineout
    SNR: 96dB
  • Mono Speaker Driver
    Available for both Dynamic and Piezo Speaker
    0.4W BTL mode into 8omega
    SNR: 97dB
  • Digital Processing
    HPF, LPF, 3D Enhance, Frequency Compensation, 5-BiQuads,
    Digital ALC/Limiter: +36dB to -54dB, 0.375dB/step
  • Digital Volume Control: +12dB to -115dB, 0.5dB/step, Mute
  • Analog Mixing: Mono input
  • PLL: Input Frequency: 27MHz, 25MHz, 24MHz, 13.5MHz, 12.288MHz, 12MHz, and
    11.2896MHz (MCKI pin)
    1fs (LRCK pin)
    32fs or 64fs (BICK pin)
    Input Level: CMOS or AC coupling Input
  • Master Clock (MCKI pin): 256/512/1024fs
  • Master Clock Output (MCKO pin): 32fs, 64fs, 128fs, 256fs
  • microP Interface: 3-Wire serial, I2C bus (version1.0, 400 KHz Fast-mode)
  • Audio Interface Format: MSB First, 2’s complement
    16/20/24bit MSB justified, 16/20/24bit LSB justified,
    16/20/24bit I2S, 16/20/24bit DSP Mode
  • CMOS Input Level
  • Power Supply:
    Analog (AVDD): 2.2 to 3.6V
    Digital (DVDD): 1.6 to 3.6V
    Driver (HVDD): 2.2 to 4.0V
  • Ta: - 30 ~ +85 ° C
  • Package: 32-pin QFN (5mm x 5mm, 0.5mm pitch)
  • Pin/Register compatible with AK4343
  • Evaluation Board: AKD4373
PDF
Download		 PDF Data Sheet
Rev. MS0991-E-00 2008/09
PDF : 1120KB / 98pages		 PDF Evaluation Board Manual
Rev. KM091602 2008/07
PDF : 959KB / 34pages
AK4373 BLOCK DIAGRAM
AK4373 BLOCK DIAGRAM
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