AD1981B Datasheet, PDF (1/28 Pages) Analog Devices – AC ’97 SoundMAX Codec

a
AC ’97 SoundMAX^® Codec
FEATURES
AC ’97 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
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
MIC1
MIC2
PHONE_IN
CD_L
CD_GND
CD_R
AUX_L
AUX_R
LINE_IN_L
LINE_IN_R
MONO_OUT
HP_OUT_L
LINE_OUT_L
LINE_OUT_R
HP_OUT_R
AD1981B
MIC PREAMP
G
G
CD
DIFF AMP
FUNCTIONAL BLOCK DIAGRAM
V_REFOUT
V_REF
G
VOLTAGE
REFERENCE
CODEC CORE
GM
GM
PCM L/R
ADC RATE
16-BIT
⌺-⌬ ADC
16-BIT
⌺-⌬ ADC
XTL_OUT XTL_IN SPDIF
SPDIF
TX
PLL
ID0
ID1
M
A
HP M
A
MZ
A
MZ
A
HP M
A
GM
GM
16-BIT
⌺-⌬ ADC
16-BIT
⌺-⌬ ADC
M GA
20-BIT
⌺-⌬ DAC
GA
GA
GA
GA
M
M
M
M
M
GA
GA
GA
GA
M
M
M
M
M GA
G = GAIN
A = ATTENUATION
M = MUTE
Z = HIGH Z
20-BIT
⌺-⌬ DAC
PCM FRONT
DAC RATE
M
ADC
AND
DAC
SLOT
LOGIC
EQ
EQ
RESET
SYNC
BIT_CLK
SDATA_OUT
SDATA_IN
AC '97
CONTROL
REGISTERS
ANALOG MIXING
CONTROL LOGIC
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.
JS0
JS1 EAPD
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: [phone]
www.analog.com
Fax: [phone] © 2003 Analog Devices, Inc. All rights reserved.