AD1981B Analog Devices, AD1981B Datasheet
AD1981B
Manufacturer Part Number
AD1981B
Description
AD1981B AC'97 SoundMAX® Codec
Manufacturer
Analog Devices
Datasheet
1.AD1981B.pdf
(28 pages)
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a
REV. A
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. Trademarks and
registered trademarks are the property of their respective companies.
LINE_OUT_L
LINE_OUT_R
MONO_OUT
HP_OUT_R
HP_OUT_L
PHONE_IN
LINE_IN_R
LINE_IN_L
FEATURES
AC ’97 2.3 COMPATIBLE FEATURES
S/PDIF Output, 20 Bits Data Format, Supporting
Integrated Stereo Headphone Amplifier
Variable Sample Rate Audio
External Audio Power-Down Control
Greater than 90 dB Dynamic Range
Stereo Full-Duplex Codec
20-Bit PCM DAC
3 Analog Line-Level Stereo Inputs for
Mono Line-Level Phone Input
Dual MIC Input with Built-In Programmable Preamp
High Quality CD Input with Ground Sense
CD_GND
AUX_R
AUX_L
48 kHz and 44.1 kHz Sample Rates
Line-In, AUX, and CD
CD_R
CD_L
MIC1
MIC2
HP
HP
DIFF AMP
MZ
MZ
M
CD
M
M
A
AD1981B
A
A
A
A
MIC PREAMP
G
G
GA
M
GA
M
GA
M
FUNCTIONAL BLOCK DIAGRAM
GA
M
M
V
REFOUT
GA
M
GA
M
GA
M
G
V
GA
REF
M
M
REFERENCE
VOLTAGE
Mono Output for Speakerphone or Internal Speaker Power
48-Lead LQFP Package
ENHANCED FEATURES
Stereo MIC Preamps Support
Built-In Digital Equalizer Function for Optimized Speaker
Full-Duplex Variable Sample Rates from 7040 Hz to 48 kHz
Jack Sense Pins Provide Automatic Output Switching
Software Programmed V
Split Power Supplies: 3.3 V Digital and 5 V Analog
Multiple Codec Configuration Options
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703
G = GAIN
A = ATTENUATION
M = MUTE
Z = HIGH Z
M
M
Management Support
Sound
with 1 Hz Resolution
Microphone and External Power Amp
GA
G
G
G
G
GA
M
M
M
M
AC ’97 SoundMAX
PCM FRONT
ADC RATE
DAC RATE
PCM L/R
16-BIT
16-BIT
16-BIT
16-BIT
20-BIT
20-BIT
- ADC
- ADC
- ADC
- ADC
- DAC
- DAC
CODEC CORE
© 2003 Analog Devices, Inc. All rights reserved.
REFOUT
EQ
EQ
Output for Biasing
XTL_OUT XTL_IN SPDIF
PLL
CONTROL LOGIC
ANALOG MIXING
LOGIC
SLOT
ADC
AND
DAC
JS0
AD1981B
REGISTERS
CONTROL
AC '97
JS1
SPDIF
TX
www.analog.com
®
EAPD
EAPD
Codec
ID0
ID1
RESET
SYNC
BIT_CLK
SDATA_OUT
SDATA_IN
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