ASAHI KASEI
[AK4381]
AK4381
108dB 192kHz 24-Bit 2ch
∆Σ
DAC
GENERAL DESCRIPTION
The AK4381 offers the perfect mix for cost and performance based audio systems. Using AKM's multi bit
architecture for its modulator the AK4381 delivers a wide dynamic range while preserving linearity for
improved THD+N performance. The AK4381 has full differential SCF outputs, removing the need for AC
coupling capacitors and increasing performance for systems with excessive clock jitter. The 24 Bit word
length and 192kHz sampling rate make this part ideal for a wide range of applications including
DVD-Audio. The AK4381 is offered in a space saving 16pin TSSOP package.
FEATURES
o
Sampling Rate Ranging from 8kHz to 192kHz
o
128 times Oversampling (Normal Speed Mode)
o
64 times Oversampling (Double Speed Mode)
o
32 times Oversampling (Quad Speed Mode)
o
24-Bit 8 times FIR Digital Filter
o
On chip SCF
o
Digital de-emphasis for 32k, 44.1k and 48kHz sampling
o
Soft mute
o
Digital Attenuator (Linear 256 steps)
o
I/F format: 24-Bit MSB justified, 24/20/16-Bit LSB justified or I
2
S
o
Master clock: 256fs, 384fs, 512fs or 768fs (Normal Speed Mode)
128fs, 192fs, 256fs or 384fs (Double Speed Mode)
128fs, 192fs (Quad Speed Mode)
o
THD+N: -94dB
o
Dynamic Range: 108dB
o
High Tolerance to Clock Jitter
o
Power supply: 4.75 to 5.25V
o
Very Small Package: 16pin TSSOP (6.4mm x 5.0mm)
o
AK4382A Pin Compatible
MCLK
VDD
CSN
CCLK
CDTI
µP
Interface
De-emphasis
Control
Clock
Divider
VSS
DZFL
DZFR
LRCK
BICK
SDTI
Audio
Data
Interface
8X
Interpolator
8X
Interpolator
∆Σ
Modulator
∆Σ
Modulator
AOUTL+
SCF
AOUTL-
AOUTR+
SCF
AOUTR-
PDN
MS0152-E-00
-1-
2002/5
AKM [ ASAHI KASEI MICROSYSTEMS ]
