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AD1981B Datasheet

  • AD1981B

  • AC ’97 SoundMAX? Codec

  • 3024.00KB

  • 34页

  • AD

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a
FEATURES
AC 鈥?7 2.3 COMPATIBLE 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
Stereo Full-Duplex Codec
20-Bit PCM DAC
3 Analog Line-Level Stereo Inputs for
Line-In, AUX, and CD
Mono Line-Level Phone Input
Dual MIC Input with Built-In Programmable Preamp
High Quality CD Input with Ground Sense
AC 鈥?7 SoundMAX Codec
AD1981B
Mono Output for Speakerphone or Internal Speaker
Power Management Support
48-Lead LQFP Package, Lead-Free Available
ENHANCED FEATURES
Stereo MIC Preamps Support
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 Biasing
Microphone and External Power Amp
Split Power Supplies: 3.3 V Digital and 5 V Analog
Multiple Codec Configuration Options
庐
FUNCTIONAL BLOCK DIAGRAM
V
REFOUT
V
REF
XTL_OUT XTL_IN SPDIF
AD1981B
G
MIC PREAMP
MIC1
MS
VOLTAGE
REFERENCE
CODEC CORE
G
G
2CMIC
SPDIF
TX
MIC2
PHONE_IN
CD_L
CD_GND
CD_R
AUX_L
AUX_R
LINE_IN_L
LINE_IN_R
CD
DIFF AMP
PCM L/R
ADC RATE
RECORD
SELECTOR
PLL
ID0
G
M
16-BIT
- ADC
16-BIT
- ADC
ID1
G
M
G
G
MONO_OUT
M
A
MIX
M
M
16-BIT
- ADC
16-BIT
- ADC
AC '97 INTERFACE
ADC
AND
DAC
SLOT
LOGIC
RESET
SYNC
BIT_CLK
EQ CORE STORAGE
M
GA
20-BIT
- DAC
BYPASS
SDATA_OUT
EQ
HP_OUT_L
HP
M
A
OUTPUT SELECTOR
M
GA
GA
M
M
M
M
GA
GA
GA
GA
M
M
M
M
M
GA
GA
GA
20-BIT
- DAC
PCM FRONT
DAC RATE
BYPASS
SDATA_IN
EQ
LINE_OUT_L
MZ
A
G = GAIN
A = ATTENUATION
M = MUTE
Z = HIGH Z
LINE_OUT_R
MZ
A
AC '97
CONTROL
REGISTERS
HP_OUT_R
HP
M
A
M
ANALOG MIXING
CONTROL LOGIC
EAPD
JS0
JS1
EAPD
REV. B
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.
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
漏 2003 Analog Devices, Inc. All rights reserved.

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