
[ASAHI KASEI]
[AK4541]
<M0047-E-01>
1999/01
- 1 -
Analog Section
Input
Multiplexer
ADC
DAC
Control Signals
LINE_IN
CD
AUX
VIDEO
MIC1
SYNC
SDATA_OUT
SDATA_IN
BIT_CLOCK
RESET#
MIC2
Phone
PC_BEEP
LINE_OUT
TRUE_LINE_LEVEL
MONO_OUT
AC'97
Registers
and
Control
Logic
AC
Link
Interface
Power Management
Clock Generator
3D Stereo Enhancement
Output
Mixer
Volume
and
Mute
Control
Volume
and
Mute
Control
Digital Section
Multiple Codec Support
Codec ID#
Voltage
Reference
EAPD
18bit
18bit
General Description
The AK4541 is a 18bit high performance codec compliant with
Audio Codec ’97 Rev 2.1 requirements. The AC Link serial interface
allows the AK4541 to be used with digital controllers as well as
custom logic accelerators to meet PC98 and PC99 requirements for a
PCI audio solution.
The AK4541 provides two pairs of stereo outputs with independent
volume controls along with a mono output, multiple stereo and mono
inputs, are combined to create flexible mixing, gain and mute
functions to provide a complete integrated audio solution for PCs.
The AK4541 can function as a Primary AC’97 or Secondary codec
depending on the codec ID configuration(Multiple codec extension),
making the AK4541 suitable for the docking station application and
multiple codec applications such as 4 speaker output or 6 speaker
output.
Sampling at 48kHz, the AK4541 provides excellent audio
performance. It offers extreme low power consumption, and flexible
power-down modes for use in Sub-NoteBook, laptops, desktop PCs,
and aftermarket add-in boards.
Like the earlier pin-compatible AK4540, AK4542 and AK4543, the
AK4541 is available in a compact 48-lead LQFP package.
The AK4541 is a pin compatible upgrade for the AK4540, AK4542
and AK4543, some software changes will be required to experience
the extra functions ot the AK4541.
Features
AC’97 Rev. 2.1 Compliant
18bit Resolution A/D and D/A
Exceeds a PC98/99 Performance Categories:
A/D……………… 87dBA SNR
D/A……………… 87dBA SNR
D/A+Mixer…...… 85dBA SNR
A-A……………… 92dBA SNR
Analog Inputs:
4 Stereo Inputs: LINE, CD, VIDEO, AUX
Speakerphone and PC BEEP Inputs
2 Independent MIC Inputs
Direct PC_Beep Pass Through for lower system costs
Analog Output:
Stereo LINE Output with volume control
True Line Level with volume control
Mono Output with volume control
Multiple codec Capability
The AK4541 can work as a Primary or Secondary.
EAPD(External Amplifier Powerdown) Support
Power Supplies:
Analog 3.3V, Digital 3.3V
Lower Power Consumption:
135mW at full operation
48 Pin LQFP Package
AC’97
Rev 2.1 Multimedia Audio CODEC
AK 4541
* AKM assumes no responsibility for the usage beyond the conditions in this data sheet.