ASAHI KASEI [AK4395]
MS0040-E-00 2000/7
- 1 -
GENERAL DESCRIPTION
The AK4395 is a high performance stereo DAC for the 192kHz sampling mode of DVD-Audio including a
24bit digital filter. The digital filter has high stopband attenuation with 110dB or more that reduces wide
band aliasing noise. The AK4395 introduces the advanced multi-bit system for ∆Σ modulator. This new
architecture achieves the wider dynamic range, while keeping much the same superior distortion
characteristics as conventional Single-Bit way. The analog outputs are filtered in the analog domain by
switched-capacitor filter (SCF) with high tolerance to clock jitter. The AK4395 also includes digital
volume, so the device is suitable for multi-channel audio system.
FEATURES
• 128x Oversampling
• Sampling Rate up to 192kHz
• High Performance 24Bit 8x Digital Filter (Slow Roll-off Option)
Ripple: ±0.0002dB, Attenuation: 110dB
• High Tolerance to Clock Jitter
• Low Distortion Differential Output
• Digital de-emphasis for 32, 44.1 & 48kHz sampling
• Channel Independent Digital Volume with Soft-transition
• Soft Mute
• THD+N: -100dB
• DR, S/N: 120dB
• I/F format: MSB justified, 16/20/24bit LSB justified, I
2
S
• Master Clock: Normal Speed: 256fs, 384fs, 512fs or 768fs
Double Speed: 128fs, 192fs, 256fs or 384fs
Quad Speed: 128fs or 192fs
• Power Supply: 5V±5%
• TTL Level Digital I/F
• Small Package: 28pin VSOP
• Pin Compatible with AK4393/4
DEM1
LRCK
BICK
SDATA
Audio Data
Interface
DEM0DVDD
CSN
AVDD
AOUTR+
8x
Interpolator
SCF
∆Σ
Modulator
AOUTR-
SCF
De-emphasis
DATT, Soft Mute
Control Register
Clock Divider
De-emphasis
Control
PDN
CCLK CDTI P/S MCLK VREFH VREFL
AOUTL+
AOUTL-
VCOM
BVSS
AVSSDVSSDIF2DIF1DIF0
SMUTE
CAD0
DZFL
DZFR
De-emphasis
DATT, Soft Mute
8x
Interpolator
∆Σ
Modulator
CAD1
Advanced Multi-Bit 192kHz 24-Bit ∆Σ DAC
AK4395