ASAHI KASEI [AK4351]
M0022-E-04 1999/12
- 1 -
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)
DS
Modulator
CKS
LRCK
AOUTL
PD
8X
Interpolator
Clock Divider
LPF
BICK
SDATA
Serial Input
Interface
MCLK
VDD
VSS
VCOM
DEM TST
DS
Modulator
AOUTR
8X
Interpolator
LPF
VREF
De-emphasis
Control
DIF1DIF0
18Bit Advanced Multi Bit DS 2ch DAC
AK4351