a
AC ’97 SoundPort® Codec
AD1819A
AC '97 FEATURES
Fully Compliant AC ’97 Analog I/O Component
48-Terminal TQFP 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
OBS
OLE
AD1819A
MIC1
MIC2
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
0dB/
20dB
LINE_IN
FUNCTIONAL BLOCK DIAGRAM
TE
CS0 CS1 CHAIN_IN CHAIN_CLK
MASTER/SLAVE
SYNCHRONIZER
PGA
SELECTOR
AUX
CD
VIDEO
16-BIT
⌺⌬ A/D
CONVERTER
PGA
16-BIT
⌺⌬ A/D
CONVERTER
RESET
PHONE_IN
⌺
G
A
M
G
A
M
G
A
M
G
A
M
G
A
M
SAMPLE
RATE
GENERATORS
G
A
M
AC LINK
SYNC
BIT_CLK
SDATA_OUT
LINE_OUT_L
MV
MONO_OUT
MV
LINE_OUT_R
MV
⌺
⌺
PHAT
STEREO
⌺
⌺
⌺
⌺
G
A
M
⌺
16-BIT
⌺⌬ D/A
CONVERTER
G
A
M
16-BIT
⌺⌬ D/A
CONVERTER
SDATA_IN
⌺
⌺
⌺
PHAT
STEREO
A
M
PC_BEEP
⌺
⌺
⌺
⌺
G = GAIN
A = ATTENUATE
M = MUTE
MV = MASTER VOLUME
⌺
OSCILLATORS
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., 1998
