ASAHI KASEI

[AK4385]

MS0246-E-01

2006/01

- 1 -

GENERAL DESCRIPTION

The AK4385 offers the perfect mix for cost and performance based audio systems. Using AKM's multi bit

architecture for its modulator the AK4385 delivers a wide dynamic range while preserving linearity for

improved THD+N performance. The AK4385 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 AK4385 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

On chip SCF

Digital de-emphasis for 32k, 44.1k and 48kHz sampling

Soft mute

Digital Attenuator (Linear 256 steps)

I/F format: 24-Bit MSB justified, 24/20/16-Bit LSB justified or I

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: -94dB

Dynamic Range: 108dB

High Tolerance to Clock Jitter

Power supply: 4.75 to 5.25V

Very Small Package: 16pin TSSOP (6.4mm x 5.0mm)

AK4381 Pin Compatible

LRCK

BICK

SDTI

Audio

Data

Interface

MCLK

PDN

∆Σ

Modulator

AOUTL+

8X

Interpolator

SCF

AOUTR+

SCF

VDD

VSS

De-emphasis

Control

µP

Interface

Clock

Divider

CSN

CCLK

CDTI

DZFR

∆Σ

Modulator

8X

Interpolator

AOUTL-

AOUTR-

DZFL

108dB 192kHz 24-Bit 2ch ∆Σ DAC

AK4385