ASAHI KASEI

[AK4523]

M0021-E-03

1999/12

- 1 -

GENERAL DESCRIPTION

The AK4523 has a dynamic range of 100dB and is well-suited middle-range MD, surround system,

musical instruments and car audio. Signal inputs and outputs are single-ended. The DAC outputs are

analog filtered to remove out of band noise. External components are minimized.

FEATURES

o DS Stereo ADC

- 64x Oversampling

- Sample Rate Ranging from 16kHz to 48kHz

- S/(N+D): 92dB

- Dynamic range, S/N: 100dB

- Digital HPF for offset cancellation

o DS Stereo DAC

- 128x Oversampling

- Sampling Rate Ranging from 16kHz to 48kHz

- 2nd order SCF + 2nd order CTF

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

- S/(N+D): 90dB

- Dynamic Range, S/N: 100dB

- Soft Mute

o High Jitter Tolerance

o Master Clock: 256fs, 384fs, 512fs

o Analog Power Supply: 4.5 to 5.5V, Digital Power Supply: 3.0 to 5.5V

VA

AGND

VD DGND

CMODE

AINL+

AINL-

AINR+

AINR-

VREFH

VCOM

AOUTL

AOUTR

MCKI

LRCK

SCLK

SDTO

SDTI

DIF0

DIF1

SMUTE

DEM1

DEM0

PD

Modulator

DS

Modulator

DS

Filter

Decimation

Filter

Decimation

HPF

HPF

Common Voltage

LPF

LPF

Modulator

DS

Modulator

DS

Interpolator

8x

Interpolator

8x

Serial I/O

Interface

Clock

Divider

20Bit Stereo

DS ADC & DAC

AK4523