ASAHI KASEI
[AK4351]
18Bit Advanced Multi Bit
DS
2ch DAC
AK4351
GENERAL DESCRIPTION
The AK4351 is a high cost performance 18bit stereo DAC for low-end digital audio systems. The
modulator in the AK4351 uses the new developed Advanced Multi Bit architecture with wide dynamic
range. The analog outputs are filtered in the analog domain by a combination of SCF and CTF.
Therefore, any external filters are not required. The SCF techniques also improve the loss of accuracy
from clock jitter. Therefore, the AK4351 is suitable for the system like STB including PLL circuit. The
AK4351 is available in very small 16pin TSSOP package, which reduces system space.
FEATURES
·
Sampling Rate Ranging from 8kHz to 50kHz
·
128 times Oversampling
·
Perfect filtering
18bit 8 times FIR Interpolator with 57dB attenuation
2nd order LPF
Total Response:
±
0.2dB at 20kHz
·
On chip Buffer with Single End Output
·
Digital de-emphasis for 44.1kHz sampling
·
I/F format: MSB justified, 16/18bit LSB justified or I
2
S
·
Master clock: 256fs or 384fs
·
TTL Level Digital Interface
·
THD+N: -88dB
·
D-Range: 96dB
·
High Tolerance to Clock Jitter
·
Power supply: 4.5 to 5.5V
·
Very Small Package: 16pin TSSOP (6.4mm x 5.0mm)
DIF0 DIF1
DEM
MCLK
CKS
TST
De-emphasis
Control
LRCK
BICK
SDATA
VDD
VSS
Serial Input
Interface
Clock Divider
VCOM
8X
Interpolator
8X
Interpolator
DS
Modulator
DS
Modulator
LPF
AOUTL
LPF
AOUTR
PD
VREF
M0022-E-04
-1-
1999/12
AKM [ ASAHI KASEI MICROSYSTEMS ]
