ASAHI KASEI
[AK4387]
AK4387
106dB 192kHz 24-Bit 2ch
∆Σ
DAC
GENERAL DESCRIPTION
The AK4387 offers the perfect mix for cost and performance based audio systems. Using AKM's multi bit
architecture for its modulator the AK4387 delivers a wide dynamic range while preserving linearity for
improved THD+N performance. The AK4387 integrates a combination of SCF and CTF filters 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 AK4387 is offered in a
space saving 16pin TSSOP package.
FEATURES
Sampling Rate Ranging from 8kHz to 192kHz
128 times Oversampling (Normal Speed Mode)
64 times Oversampling (Double Speed Mode)
32 times Oversampling (Quad Speed Mode)
24-Bit 8 times FIR Digital Filter
SCF with High Tolerance to Clock Jitter
Single Ended Output Buffer
Digital de-emphasis for 32k, 44.1k and 48kHz sampling
Soft mute
Digital Attenuator (Linear 256 steps)
2
I/F format: 24-Bit MSB justified, 24/20/16-Bit LSB justified or I S
Master clock: 256fs, 384fs, 512fs, 768fs or 1152fs (Normal Speed Mode)
128fs, 192fs, 256fs or 384fs (Double Speed Mode)
128fs, 192fs (Quad Speed Mode)
THD+N: -90dB
Dynamic Range: 106dB
Power supply: 4.5 to 5.5V
Very Small Package: 16pin TSSOP
MCLK
DVDD
AVDD
CSN
CCLK
CDTI
µP
Interface
De-emphasis
Control
Clock
Divider
VSS
VCOM
DZF
LRCK
BICK
SDTI
Audio
Data
Interface
ATT
8X
Interpolator
8X
Interpolator
∆Σ
Modulator
∆Σ
Modulator
SCF
LPF
SCF
LPF
AOUTL
ATT
AOUTR
RSTN
MS0429-E-00
-1-
2005/09
AKM [ ASAHI KASEI MICROSYSTEMS ]
