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ADSP-1981BL Datasheet(PDF) 1 Page - Analog Devices

Part No. ADSP-1981BL
Description  AC 97 SoundMAX Codec
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Maker  AD [Analog Devices]
Homepage  http://www.analog.com
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ADSP-1981BL Datasheet(HTML) 1 Page - Analog Devices

 
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AC ’97 SoundMAX® Codec
AD1981BL
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.
Specifications subject to change without notice. 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 owners.
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
© 2005 Analog Devices, Inc. All rights reserved.
AC ’97 2.3 COMPATIBLE FEATURES
S/PDIF output, 20-bit data format, supporting
48 kHz and 44.1 kHz sample rates
Integrated stereo headphone amplifier
Variable sample rate audio
External audio power-down control
>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 preamplifier
High quality CD input with ground sense
Mono output for speakerphone or internal speaker
power management support
48-lead LQFP package, Pb-free available
ENHANCED FEATURES
Stereo MIC preamplifier 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 for automatic output switching
Software-programmed VREFOUT output for biasing
microphone and external power amplifier
Low power 3.3 V operation for analog and digital supplies
Multiple codec configuration options
FUNCTIONAL BLOCK DIAGRAM
A
M
MIC1
MIC2
PHONE_IN
CD_L
CD_GND
CD_R
AUX_L
AUX_R
LINE_IN_L
MIC PREAMP
MONO_OUT
HP_OUT_L
HP
MZ
LINE_OUT_L
MZ
LINE_OUT_R
HP_OUT_R
HP
G = GAIN
A = ATTENUATION
M = MUTE
Z = HIGH Z

GA

PCM FRONT
DAC RATE
M

M

PCM L/R
ADC RATE
G
LINE_IN_R
CODEC CORE
EAPD
PLL
XTL_OUT XTL_IN SPDIF
SPDIF
TX
ID0
ID1
RESET
ADC
AND
DAC
SLOT
LOGIC
SYNC
BIT_CLK
SDATA_OUT
SDATA_IN
JS0
JS1
EAPD
AD1981BL
G
G
A
M
A
A
A
M
M
GA
M
GA
M
GA
M
GA
M
GA
M
GA
M
GA
M
GA
M
M
GA
M
M
EQ
EQ
G
G

M
G
M
G
ANALOG MIXING
CONTROL LOGIC
AC '97
CONTROL
REGISTERS
VREFOUT
VREF
16-BIT
Σ-∆ ADC
16-BIT
Σ-∆ ADC
16-BIT
Σ-∆ ADC
16-BIT
Σ-∆ ADC
20-BIT
Σ-∆ DAC
20-BIT
Σ-∆ DAC
CD
DIFF AMP
VOLTAGE
REFERENCE
Figure 1.


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