®
a
AC ’97 SoundMAX Codec
AD1888
FEATURES
ENHANCED FEATURES
AC ’97 2.3 COMPATIBLE FEATURES
6 DAC Channels for 5.1 Surround
90 dB Dynamic Range
Selectable Front and Rear MIC Inputs
with Preamp
Integrated PLL for System Clocking
Crystal-Free Operation
20-Bit PCM DACs
S/PDIF Output
Integrated Stereo Headphone Amplifiers
Phone, Aux, and Line-In
High Quality CD Input
Selectable MIC Input
Variable Sample Rate 7 kHz to 96 kHz
Jack Sense (Auto Topology Switching)
Software Controlled VREF_OUT for MIC Bias
Software Enabled Outputs for Jack Sharing
Auto Down-Mix and Channel Spreading Modes
Mono Output
External Amplifier Power-Down Control
Double Rate Audio (fS = 96 kHz)
Power Management Modes
48-Lead LQFP and 48-Lead LFCSP Packages
FUNCTIONAL BLOCK DIAGRAM
XTAL_IN
AD1888
MIC1
G
MIC2
XTAL_OUT
PHONE_IN
PLL
CD_L
DIFF
AMP
16-BIT ⌺-⌬
ADC
G
G
M
M
CD_R
AUX_L
ADC
SLOT
LOGIC
ID0
AUX_R
16-BIT ⌺-⌬
ADC
LINE_IN_L
LINE_IN_R
ID1
RESET
SYNC
AC '97
CONTROL
GA
M
GA
M
REGISTERS
GA
M
GA
GA
M
BIT_CLK
SDATA_OUT
SDATA_IN
MONO_OUT
M
A
GA
M
GA
M
M
GA
M
GA
M
DAC
SLOT
LOGIC
LINE_OUT_L
LINE_OUT_R
MZ
MZ
A
A
20-BIT ⌺-⌬
DAC
M
M
GA
GA
SPDIF
SPDIF_OUT
EAPD
20-BIT ⌺-⌬
DAC
TX
M
M
M
M
M
M
EAPD
CENTER_OUT
LFE_OUT
MZ
MZ
A
A
20-BIT ⌺-⌬
DAC
M
M
GA
GA
JS0
JS1
JACK
SENSE
LOGIC
20-BIT ⌺-⌬
DAC
G = GAIN
A = ATTENUATION
M = MUTE
Z = HIGH-Z
VOLTAGE
REFERENCE
V
REF
SURR_L/
HP
HP
M
M
A
A
20-BIT ⌺-⌬
DAC
HP_OUT_L
M
M
GA
GA
V
REFOUT
SURR_R/
HP_OUT_R
20-BIT ⌺-⌬
DAC
REV. 0
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, norforanyinfringementsofpatentsorotherrightsofthirdpartiesthat
may result from its use. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703
www.analog.com
© 2003 Analog Devices, Inc. All rights reserved.