ASAHI KASEI
[AK4395]
AK4395
Advanced Multi-Bit 192kHz 24-Bit
∆Σ
DAC
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
DIF0
DIF1
DIF2
DVDD
DVSS
DEM0
DEM1
AVDD AVSS
LRCK
BICK
SDATA
Audio Data
Interface
De-emphasis
DATT, Soft Mute
De-emphasis
DATT, Soft Mute
Control Register
8x
Interpolator
8x
Interpolator
De-emphasis
Control
∆Σ
Modulator
∆Σ
Modulator
BVSS
VCOM
DZFL
AOUTL+
SMUTE
SCF
AOUTL-
AOUTR+
SCF
PDN
CAD0
CAD1
AOUTR-
DZFR
Clock Divider
CSN
CCLK
CDTI
P/S
MCLK
VREFH VREFL
MS0040-E-00
-1-
2000/7
AKM [ ASAHI KASEI MICROSYSTEMS ]
