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AKD4525

20Bit Stereo ∆Σ ADC & DAC with X’ tal Osc

Asahi Kasei Microdevices 

ASAHI KASEI

[AK4525]

AK4525

20Bit Stereo ∆Σ ADC & DAC with X’ tal Osc

GENERAL DESCRIPTION

The AK4525 has a dynamic range of 100dB and is well-suited middle-range MD, surround system,

musical instruments and car audio. Analog inputs are full-differential with single-end capability. Analog

outputs are single-ended. The AK4525 has X’ tal oscillation circuit and master mode.

FEATURES

o ∆Σ Stereo ADC

- 64x Oversampling

- Sample Rate Ranging from 32kHz to 48kHz

- S/(N+D): 92dB

- Dynamic range, S/N: 100dB

- Digital HPF for offset cancellation

o ∆Σ Stereo DAC

- 128x Oversampling

- Sampling Rate Ranging from 32kHz 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 X’ tal Oscillation circuit

o Master/Slave Mode

o Analog Power Supply: 4.5 to 5.5V, Digital Power Supply: 3.1 to 5.5V

VA AGND VD DGND

CMODE

AINL+

AINL-

AINR+

AINR-

VREFH

VCOM

AOUTL

AOUTR

∆Σ

Modulator

Decimation

Filter

HPF

∆Σ

Modulator

Decimation

Filter

HPF

Clock

Gen &

Divider

Common Voltage

Serial I/O

Interface

LPF

∆Σ

Modulator

8x

Interpolator

LPF

∆Σ

Modulator

8x

Interpolator

MCKO

XTI

XTO

LRCK

SCLK

SDTO

SDTI

DIF0

DIF1

SMUTE

M/S

PDN

DEM0 DEM1

MS0053-E-00

-1-

2000/9

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