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AD1881 Datasheet

  • AD1881

  • AC’97 SoundMAX Codec

  • 26頁

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a
AC鈥?7 2.1 FEATURES
Variable Sample Rate
True Line-Level Output
Supports Secondary Codec Modes
AC鈥?7 SoundMAX
廬
Codec
AD1881A
ENHANCED FEATURES
Mobile Low Power Mixer Mode
Digital Audio Mixer Mode
Full Duplex Variable 8 kHz to 48 kHz Sampling Rate
with 1 Hz Resolution
PHAT鈩?Stereo 3D Stereo Enhancement
Split Power Supplies (3.3 V Digital/5 V Analog)
Extended 6-Bit Master Volume Control
Audio Amp Power-Down Signal
AC鈥?7 FEATURES
Designed for AC鈥?7 Analog I/O Component
48-Lead LQFP Package
Multibit
Converter Architecture for Improved
S/N Ratio Greater than 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 or Internal Speaker
Power Management Support
FUNCTIONAL BLOCK DIAGRAM
CS0 CS1
EAPD
MODE
AD1881A
MODE/SYNCHRONIZER
MIC1
MIC2
LINE_IN
0dB/
20dB
CD
VIDEO
PHONE_IN
SELECTOR
AUX
PGA
16-BIT
A/D
CONVERTER
PGA
16-BIT
A/D
CONVERTER
RESET
SYNC
MONO_OUT
MV
G
A
M
G
A
M
G
A
M
G
A
M
G
A
M
G
A
M
AC LINK
SAMPLE
RATE
GENERATORS
BIT_CLK
LNLVL_OUT_L
SDATA_OUT
POP
LINE_OUT_L
MV
D
A
M
PHAT
STEREO
NC
G
A
M
16-BIT
D/A
CONVERTER
SDATA_IN
LINE_OUT_R
MV
POP
PHAT
STEREO
NC
G
A
M
16-BIT
D/A
CONVERTER
LNLVL_OUT_R
A
M
PC_BEEP
G = GAIN
A = ATTENUATE
M = MUTE
MV = MASTER VOLUME
NC = NO CONNECT
OSCILLATORS
XTL_OUT
XTL_IN
SoundMAX is a registered trademark and PHAT is a trademark of Analog Device, 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
漏 Analog Devices, Inc., 2000

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