117dB 768kHz/32-bit 8ch Premium DAC

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AK4468VN  The AK4468 is a new generation 32-bit 8ch Premium DAC which adopts VELVET SOUND technology. It corresponds to a 768kHz PCM input and an DSD512 input at maximum, suitable for playback of high resolution audio sources that are becoming widespread in network audios, USB-DACs and Car Audio Systems. In addition, “OSR-Doubler” technology is adopted, making the AK4468 capable of supporting wide range signals and achieving low out-of-band noise while realizing low power consumption. Moreover, the AK4468 has six types of 32-bit digital filters, realizing simple and flexible sound reproduction in wide range of applications.

Key Features

(1) Dynamic Range, S/N: 117dB
(2) THD+N: -107dB
(3) Differential Voltage Output: 5.6Vpp
(4) 256x Over Sampling
(5) Sampling Rate: 8kHz to 768kHz
(6) 32-bit 8x Digital Filter
  - Ripple: ±0.0032dB, Attenuation: 80dB (Sharp Roll-Off Filter Setting)
  - Six Types of High Quality Sound Filter Option
   ・Sharp Roll-off
   ・Slow Roll-off
   ・Short Delay Sharp Roll-off, (GD = 5.8/fs)
   ・Short Delay Slow Roll-off, (GD = 4.8/fs)
   ・Super Slow Roll-off
   ・Low Dispersion Short Delay Filter
(7) High Tolerance to Clock Jitter
(8) Low Distortion/ Low Noise High Performance Differential Amplifier Output
(9) DSD64, DSD128, DSD256, DSD512 Input Support
(10) Daisy Chain
(11) Digital De-emphasis for 32kHz, 44.1kHz and 48kHz sampling
(12) Soft Mute
(13) Digital Attenuator (0dB to -127dB, 0.5dB step + mute)
(14) Audio I/F Format:
  - MSB justified
  - LSB justified
  - I2S
  - DSD
  - TDM
(15) PCM/DSD Automatic Switching Function
(16) 3-wire Serial and I2C μP I/F
(17) Supports Pin Control Mode
(18) Master Clock:
  - fs = 7.2kHz to 32kHz: 256fs, 384fs, 512fs, 768fs, 1152fs
  - fs = 32kHz to 54kHz: 256fs, 384fs, 512fs, 768fs
  - fs = 54kHz to 108kHz: 256fs, 384fs
  - fs = 108kHz to 216kHz: 128fs, 192fs
  - fs = 216kHz to 388kHz: 32fs, 48fs, 64fs, 96fs
  - fs = 388kHz to 776kHz: 16fs, 32fs, 48fs, 64fs
(19) Digital Input Level: CMOS
(20) Power Supply:
  by Internal LDO (LDOE pin = “H”):    TVDD = 3.0 to 3.6V, AVDD = 3.0 to 5.5V
  by external supply (LDOE pin = “L”): TVDD = 1.7 to 3.6V, AVDD = 3.0 to 5.5V, VDD18 = 1.7 to 1.98V
(21) Operational Temperature: -40 to 105°C (when the Exposed Pad is connected to AVSS)
(22) Package: 48-pin QFN

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