AK4545 Просмотр технического описания (PDF) - Asahi Kasei Microdevices

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AK4545

AC’ 97™ Audio CODEC with SRC and DIT

Asahi Kasei Microdevices 

[ASAHI KASEI]

[AK4545]

AK4545

AC’ 97™ Audio CODEC with SRC and DIT

Features

• AC’ 97 Rev. 2.1 Compliant

• S/PDIF output

• 18bit Resolution A/D and D/A

• Exceeds PC99 Performance Requirements:

AK4545 (@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

• EAPD(External Amplifier Powerdown) Support

• Power Supplies: Analog 5.0V, Digital 3.3V

• Low Power Consumption

215mW(Analog:5V/Digital:3.3V) at full operation

• 48 Pin LQFP Package

General Description

The AK4545 is a 18bit high performance codec which supports

variable sampling rate conversion compliant with Audio Codec ’ 97

Rev 2.1 requirements.

The AK4545 supports S/PDIF output that is digital audio transmitter

of IEC958. Audio digital data in PC can be output by this S/PDIF out.

The AK4545 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 AK4545

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

DAC for AD monitoring.

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 AK4545 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 AK4541, AK4543 and AK4544A , the

AK4545 is available in a compact 48-lead LQFP package.

Reference : Audio Codec ’ 97 Revision 2.1

nBlock Diagram

EAPD

SYNC

SDATA_OUT

SDATA_IN

BIT_CLK

RESET#

TX

Digital Section

PLL

Power Management

AC

Link

Interface

ADC

AC’97

Registers

and

Control

Logic

Control Singals

Dataslot

Controller

DAC

Analog Section

Input

Multiplexer

Volume

and

Mute

Control

Output

Mixer

Volume

and

Mute

Control

S/PCDlIoFcOkut

Clock

GCeonnetraotlor Generator

Voltage

Reference

3D Stereo Enhancement

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

LINE_IN

CD

AUX

VIDEO

MIC1

MIC2

Phone

PC_BEEP

LINE_OUT

TRUE_LINE_LEVEL

MONO_OUT

MS0058-E-00

-1-

2000/11

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