REV.0
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a
AD1885
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
AC’97 2.1 FEATURES
Variable Sample Rate Audio
Multiple Codec Configuration Options
External Audio Power-Down Control
AC’97 FEATURES
AC’97 2.1-Compliant
Greater than 90 dB Dynamic Range
Stereo Headphone Amplifier
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:
LINE-IN, CD, VIDEO, and AUX
Two Analog Line-Level Mono Inputs for Speakerphone
and PC BEEP
Mono MIC Input w/Built-In 20 dB Preamp, Switchable
from Two External Sources
High Quality CD Input with Ground Sense
Stereo Line-Level Outputs
Mono Output for Speakerphone or Internal Speaker
Power Management Support
48-Terminal LQFP Package
ENHANCED FEATURES
Full Duplex Variable Sample Rates from 7040 Hz to
48kHz with 1 Hz Resolution
Jack Sense Pins Provide Automatic Output Switching
Software-Enabled V
REFOUT
Output for Microphones and
External Power Amp
Split Power Supplies (3.3 V Digital/5 V Analog)
Mobile Low-Power Mixer Mode
Extended 6-Bit Master Volume Control
Extended 6-Bit Headphone Volume Control
Digital Audio Mixer Mode
PHAT™ Stereo 3D Stereo Enhancement
SoundPort is a registered trademark and PHAT is a trademark of Analog Devices, Inc.
G
A
M
G
A
M
H9018
G
A
M
SYNC
BIT_CLK
PHAT
STEREO
G
A
M
H9018
H9018
A
M
AD1885
H9018
16-BIT
H9018H9004 D/A
CONVERTER
G = GAIN
A = ATTENUATE
M = MUTE
MV = MASTER VOLUME
HV = HEADPHONE VOLUME
OSCILLATOR
XTL_OUT XTL_IN
SDATA_IN
H9018
H9018
H9018 H9018 H9018
H9018 H9018 H9018 H9018
SDATA_OUT
G
A
M
G
A
M
G
A
M
16-BIT
H9018H9004 D/A
CONVERTER
H9018
PHAT
STEREO
H9018
MMV
0dB/
20dB
H9018
H9018
SELECTOR
PGA
PGA
16-BIT
H9018H9004 A/D
CONVERTER
16-BIT
H9018H9004 A/D
CONVERTER
SAMPLE
RATE
GENERATORS
AC LINK
HV
JACK SENSES
AND EAPD CTRL
CHIP SELECT
JS0/EAPD JS1
V
REFOUT
MIC1
MIC2
AUX
CD
VIDEO
LINE_OUT_L
MONO_OUT
LINE
PHONE_IN
LINE_OUT_R
PC_BEEP
HP_OUT_R
HP_OUT_L
HV
G
A
M
NC
NC
V
REF
MV
MV
H9018H9018
H9018
POP
POP
ID0 ID1
RESET