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AD1981AJST-REEL 数据手册 - ADI（亚德诺）
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AD1981AJST-REEL数据手册
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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 that
may result from its use. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices.
a
AD1981A
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700 www.analog.com
Fax: 781/326-8703 © Analog Devices, Inc., 2002
AC ‘97 SoundMAX
®
Codec
FUNCTIONAL BLOCK DIAGRAM
AC ’97 2.2-COMPLIANT CODEC
FEATURES
S/PDIF Output, 20 Bits Data Format, Supporting
48 kHz and 44.1 kHz Sample Rates
Integrated Stereo Headphone Amplifier
Variable Sample Rate Audio
External Audio Power-Down Control
Greater than 90 dB Dynamic Range
16-Bit Stereo Full-Duplex Codec
20-Bit DAC Input
Three Analog Line-Level Stereo Inputs for
LINE-IN, AUX, and CD
Mono Line-Level Phone Input
Mono MIC Input with Built-In Programmable Preamp
High Quality CD Input with Ground Sense
Mono Output for Speakerphone or Internal Speaker
Power Management Support
48-Lead LQFP Package
ENHANCED FEATURES
Built-in Digital Equalizer Function for Optimized
Speaker Sound
Full Duplex Variable Sample Rates from 7040 Hz to 48 kHz
with 1 Hz Resolution
Jack Sense Pins Provide Automatic Output Switching
Software-Programmed V
REFOUT
Output for Microphone
Bias and External Power Amp
Split Power Supplies: 3.3 V Digital and 5 V Analog
Multiple Codec Configuration Options
SoundMAX is a registered trademark of Analog Devices, Inc.
EQ COEFF STORAGE
AC ’97 CONTROL REGISTERS
16-BIT - A/D
CONVERTER
16-BIT - A/D
CONVERTER
JACK SENSE
ANALOG
MUTE
CONTROL
LOGIC
MIC_IN
CD_L
CD_GND
CD_R
LINE_IN
HP_OUT_L
LINE_OUT_L
MONO_OUT
LINE_OUT_R
HP_OUT_R
AUX
PHONE_IN
HP A
M
A
M
HP A
M
MIC PREAMP
G
A
A
SELECTOR
SELECTOR
CD
DIFF AMP
M
GA
JS0
JS1
M
GA
M
GA
M
GA
M
GA
M
M
M
M
M
GA
M
GA
M
G
M
G
M
G
M
G
V
REFOUT
XTL_OUT XTL_IN ID1 ID0
XTAL OSCILLATOR
PLL CLOCK
GENERATOR
LINK PORT/
ID SELECT
A/D SAMPLE RATE
GENERATOR
20-BIT - D/A
CONVERTER
20-BIT - D/A
CONVERTER
16-BIT - A/D
CONVERTER
D/A SAMPLE RATE
GENERATOR
16-BIT - A/D
CONVERTER
AC ’97 LINK SIGNALS
AC ’97 SERIAL INTERFACE
SPDIF
SPDIF
AD1981A
EAPD
EAPD
SPKR
EQ
SPKR
EQ
VREF
G
M
GA
M
GA
M
GA
V
REF
KEY:
G = GAIN
A = ATTENUATE
M = MUTE
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