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AKD5381

24Bit 96kHz ∆Σ ADC

Asahi Kasei Microdevices 

ASAHI KASEI

[AK5381]

AK5381

24Bit 96kHz ∆Σ ADC

GENERAL DESCRIPTION

The AK5381 is a stereo A/D Converter with wide sampling rate of 4kHz ∼ 96kHz and is suitable for

High-end audio system. The AK5381 achieves high accuracy and low cost by using Enhanced dual bit ∆Σ

techniques. The AK5381 requires no external components because the analog inputs are single-ended.

The audio interface has two formats (MSB justified, I2S) and can correspond to many systems like music

instrument and AV receiver.

FEATURES

† Stereo ∆Σ ADC

† On-Chip Digital Anti-Alias Filtering

† Single-ended Input

† Digital HPF for DC-Offset cancel

† S/(N+D): 96dB@5V for 48kHz

† DR:

106dB@5V for 48kHz

† S/N:

106dB@5V for 48kHz

† Sampling Rate Ranging from 4kHz to 96kHz

† Master Clock:

256fs/384fs/512fs/768fs (∼ 48kHz)

256fs/384fs

(∼ 96kHz)

† Audio Interface: Master or Slave Mode selectable

† Input level: TTL/CMOS selectable

AK5381 does not support TTL level mode at fs=48kHz to 96kHz.

† Output format: 24bit MSB justified / I2S selectable

† Power Supply: 4.5 ∼ 5.5V (VA)

2.7 ∼ 5.5V (VD at 48kHz)

3.0 ∼ 5.5V (VD at 96kHz)

† Ta = −40 ∼ 85°C (VT), −20 ∼ 85°C (ET)

† Small 16pin TSSOP Package

† AK5380 Pin-compatible

VA AGND VD DGND

MCLK

AINL

AINR

VCOM

∆Σ

Modulator

∆Σ

Modulator

Voltage Reference

Decimation

Filter

Decimation

Filter

Clock Divider

Serial I/O

Interface

LRCK

SCLK

SDTO

CKS2 CKS1 CKS0

PDN

DIF

MS0200-E-02

-1-

2006/01

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