REV.0
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a
AD1881A
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700 World Wide Web Site: http://www.analog.com
Fax: 781/326-8703 © Analog Devices, Inc., 2000
AC’97 SoundMAX
®
Codec
FUNCTIONAL BLOCK DIAGRAM
G
A
M
G
A
M
H9018
G
A
M
SYNC
BIT_CLK
PHAT
STEREO
G
A
M
MV
MV
AD1881A
MIC1
MIC2
AUX
CD
VIDEO
LINE_OUT_L
MONO_OUT
LINE_IN
PHONE_IN
LINE_OUT_R
H9018
G = GAIN
A = ATTENUATE
M = MUTE
MV = MASTER VOLUME
NC = NO CONNECT
OSCILLATORS
XTL_OUT XTL_IN
CS1 EAPD MODE
RESET
SDATA_IN
CS0
H9018
H9018
H9018 H9018 H9018
H9018 H9018 H9018 H9018
H9018
MODE/SYNCHRONIZER
SDATA_OUT
G
A
M
G
A
M
G
A
M
16-BIT
H9018H9004 D/A
CONVERTER
16-BIT
H9018H9004 D/A
CONVERTER
H9018
PC_BEEP
PHAT
STEREO
H9018
MV
LNLVL_OUT_R
LNLVL_OUT_L
0dB/
20dB
H9018
H9018
SELECTOR
PGA
PGA
16-BIT
H9018H9004 A/D
CONVERTER
16-BIT
H9018H9004 A/D
CONVERTER
SAMPLE
RATE
GENERATORS
AC LINK
D
A
M
G
A
M
NC
NC
H9018
POP
H9018
POP
A
M
H9018
H9018
AC’97 2.1 FEATURES
Variable Sample Rate
True Line-Level Output
Supports Secondary Codec Modes
AC’97 FEATURES
Designed for AC’97 Analog I/O Component
48-Lead LQFP Package
Multibit H9018H9004 Converter Architecture for Improved
S/N Ratio Greater than 90 dB
16-Bit Stereo Full-Duplex Codec
Four Analog Line-Level Stereo Inputs for Connection
from LINE, CD, VIDEO, and AUX
Two Analog Line-Level Mono Inputs for Speakerphone
and PC BEEP
Mono MIC Input Switchable from Two External
Sources
High Quality CD Input with Ground Sense
Stereo Line-Level Output
Mono Output for Speakerphone or Internal Speaker
Power Management Support
ENHANCED FEATURES
Mobile Low Power Mixer Mode
Digital Audio Mixer Mode
Full Duplex Variable 8 kHz to 48 kHz Sampling Rate
with 1 Hz Resolution
PHAT™ Stereo 3D Stereo Enhancement
Split Power Supplies (3.3 V Digital/5 V Analog)
Extended 6-Bit Master Volume Control
Audio Amp Power-Down Signal
SoundMAX is a registered trademark and PHAT is a trademark of Analog Device, Inc.