[ASAHI KASEI]
[AK4544A]
AK4544A
Features
AC’ 97™ Multimedia Audio CODEC with SRC
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
•
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
nBlock
Diagram
SEL_CMOS
EAPD
SYNC
SDATA_OUT
SDATA_IN
BIT_CLOCK
RESET#
Codec ID#
Digital Section
Power Management
ADC
PLL
Analog Section
Volume
and
Mute
Control
LINE_IN
CD
AUX
VIDEO
MIC1
MIC2
Phone
PC_BEEP
AC
Link
Interface
Dataslot
Controller
AC'97
Registers
and
Control Signals
Control
Logic
DAC
Input
Multiplexer
Output
Mixer
Volume
and
Mute
Control
LINE_OUT
TRUE_LINE_LEVEL
MONO_OUT
Multiple Codec Support
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-
2000/04
AKM [ ASAHI KASEI MICROSYSTEMS ]
