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AK4544A

AC’ 97™ Multimedia Audio CODEC with SRC

Asahi Kasei Microdevices 

[ASAHI KASEI]

[AK4544A]

AK4544A

AC’ 97™ Multimedia Audio CODEC with SRC

Features

• AC’ 97 Rev. 2.1 Compliant

• 18bit Resolution A/D and D/A

• Exceeds PC99 Performance Requirements:

AK4544A (@fs=48k)

A/D……………… 90dBA

D/A……………… 89dBA

A-A……………… 95dBA

• Analog Inputs:

4 Stereo Inputs: LINE, CD, VIDEO, AUX

Speakerphone and PC BEEP Inputs

2 Independent MIC Inputs

• Variable Sampling Rate Support

48k, 44.1k, 32k, 22.05k, 16k, 11.025k, 8k

• Analog Output:

Stereo LINE Output with volume control

True Line Level with volume control

Mono Output with volume control

• 3D Stereo Enhancement

• POP Function & DAC Feed Back Control

• Multiple codec Capability

The AK4544A can work as a Primary or Secondary

codec depended on codec ID configuration.

• EAPD(External Amplifier Powerdown) Support

• Power Supplies: Analog 5.0V, Digital 5.0V or 3.3V

• Low Power Consumption

230mW(Analog:5V/Digital:3.3V) at full operation

• 48 Pin LQFP Package

General Description

The AK4544A is a 18bit high performance codec which support

variable sampling rate conversion compliant with Audio Codec ’ 97

Rev 2.1 requirements.

The AK4544A provides two pairs of stereo outputs with independent

volume controls, a mono output, and multiple stereo and mono inputs,

along with flexible mixing, gain and mute functions to provide a

complete integrated audio solution for PCs. In addition, the AK4544A

has the POP feature suitable for 3D positioning and direct output from

DAC for AD monitoring or docking station application.

The AK4544A can function as a Primary AC’ 97 or Secondary codec

depending on the codec ID configuration(Multiple codec extension),

making the AK4544A suitable for the docking station application and

multiple codec applications.

Sampling frequency is programmable through AC-link as 48k, 44.1k,

32k, 22.05k, 16k, 11.025k, and 8kHz. This setting is done independent

to ADC and DAC side while L/R channels are kept identical.

The AK4544A provides excellent audio performance, meeting or

exceeding PC99 requirements for a PCI audio solution. It has low

power consumption, and flexible power-down modes for use in laptops

as well as desktop PCs and aftermarket add-in boards.

Like the earlier pin-compatible AK4540, AK4541, AK4542, and

AK4543, the AK4544A is available in a compact 48-lead LQFP

package.

Reference : Audio Codec ’ 97 Revision 2.1

nBlock Diagram

SEL_CMOS

EAPD

SYNC

SDATA_OUT

SDATA_IN

BIT_CLOCK

RESET#

Codec ID#

Digital Section

PLL Analog Section

Power Management

AC

Link

Interface

Dataslot

Controller

ADC

AC'97

Registers

and Control Signals

Control

Logic

DAC

Multiple Codec Support

Input

Multiplexer

Output

Mixer

Volume

and

Mute

Control

Volume

and

Mute

Control

Clock Generator

Voltage

Reference

3D Stereo Enhancement

* AKM assumes no responsibility for the usage beyond the conditions in this data sheet.

<MS0026-E-00>

-1-

LINE_IN

CD

AUX

VIDEO

MIC1

MIC2

Phone

PC_BEEP

LINE_OUT

TRUE_LINE_LEVEL

MONO_OUT

2000/04

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