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reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
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a
AD1819B
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., 1999
AC’97 SoundPort
®
Codec
AC’97 FEATURES
Fully Compliant AC’97 Analog I/O Component
48-Terminal LQFP Package
Multibit SD Converter Architecture for Improved
S/N Ratio >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
Power Management Support
ENHANCED FEATURES
Support for Multiple Codec Communications
DSP 16-Bit Serial Port Format
Variable 7 kHz to 48 kHz Sampling Rate with 1 Hz
Resolution
Supports Modem Sample Rates and Filtering
Phat™ Stereo 3D Stereo Enhancement
VHDL and Verilog Models of Serial Port Available
SoundPort is a registered trademark of Analog Devices, Inc.
Phat is a trademark of Analog Devices, Inc.
FUNCTIONAL BLOCK DIAGRAM
G
A
M
G
A
M
S S
S
G
A
M
AC LINK
SYNC
BIT_CLK
S
PHAT
STEREO
PHAT
STEREO
S
S
G
A
M
S
S
A
M
MV
0dB/
20dB
MV
AD1819B
MIC1
MIC2
AUX
CD
VIDEO
PC_BEEP
LINE_OUT_L
MONO_OUT
LINE_IN
PHONE_IN
LINE_OUT_R
S
MV
SELECTOR
PGA
PGA
16-BIT
SD A/D
CONVERTER
G
A
M
SAMPLE
RATE
GENERATORS
G = GAIN
A = ATTENUATE
M = MUTE
MV = MASTER VOLUME
OSCILLATORS
XTALO XTALI
CS1 CHAIN_IN CHAIN_CLK
RESET
SDATA_IN
CS0
S S S
S S S S
MASTER/SLAVE
SYNCHRONIZER
SDATA_OUT
G
A
M
16-BIT
SD A/D
CONVERTER
G
A
M
G
A
M
16-BIT
SD D/A
CONVERTER
16-BIT
SD D/A
CONVERTER