a
AC’97 FEATURES
Fully Compliant AC’97 Analog I/O Component
48-Terminal LQFP Package
Multibit
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
AC’97 SoundPort
®
Codec
AD1819B
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
FUNCTIONAL BLOCK DIAGRAM
CS0 CS1 CHAIN_IN CHAIN_CLK
AD1819B
MIC1
MIC2
LINE_IN
AUX
CD
VIDEO
PHONE_IN
SYNC
AC LINK
0dB/
20dB
MASTER/SLAVE
SYNCHRONIZER
PGA
SELECTOR
16-BIT
A/D
CONVERTER
PGA
16-BIT
A/D
CONVERTER
RESET
G
A
M
G
A
M
G
A
M
G
A
M
G
A
M
G
A
M
G
A
M
SAMPLE
RATE
GENERATORS
BIT_CLK
SDATA_OUT
LINE_OUT_L
MONO_OUT
LINE_OUT_R
MV
MV
MV
A
M
PHAT
STEREO
16-BIT
D/A
CONVERTER
SDATA_IN
PHAT
STEREO
G = GAIN
A = ATTENUATE
M = MUTE
MV = MASTER VOLUME
G
A
M
16-BIT
D/A
CONVERTER
OSCILLATORS
PC_BEEP
XTALO
XTALI
SoundPort is a registered trademark of Analog Devices, Inc.
Phat is a trademark of Analog Devices, Inc.
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, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
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
AD [ ANALOG DEVICES ]
