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AD1985JST Datasheet(Fiches technique) 1 Page - Analog Devices

Numéro de pièce AD1985JST
Description  AC ’97 SoundMAX Codec
Télécharger  48 Pages
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Fabricant  AD [Analog Devices]
Site Internet  http://www.analog.com
Logo AD - Analog Devices

AD1985JST Datasheet(HTML) 1 Page - Analog Devices

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AC ’97 SoundMAX® Codec
AD1985
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
© 2004 Analog Devices, Inc. All rights reserved.
AC ’97 2.3 COMPLIANT FEATURES
6 DAC channels for 5.1 surround
Greater than 90 dB dynamic range
20-bit resolution on all DACs
S/PDIF Output
Integrated stereo headphone amplifiers
Variable rate audio
Double rate audio (fS = 96 kHz)
Line-level mono phone input
High quality CD mixer input
Selectable MIC input with preamp
AUX and line in stereo inputs
External amplifier power down (EAPD)
Power management modes
Jack sensing and peripheral enumeration/identification
48-lead LQFP package
ENHANCED FEATURES
Integrated parametric equalizer (EQ)
Stereo microphone with preamplifiers
Integrated PLL for system clocking
Variable sample rate 7 kHz to 96 kHz
7 kHz to 48 kHz in 1 Hz increments
96 kHz for double rate audio
Advanced jack sense with auto topology switching
Software enabled VREFOUT for microphones and external
power amp
Software enabled outputs for jack sharing
Auto down-mix and channel spreading
Microphone to mono output
Stereo microphone analog passthrough to outputs
Built-in stereo microphone and Center/LFE pin sharing
Selectable Center/LFE tip/ring swapping to support various
speaker products
FUNCTIONAL BLOCK DIAGRAM
PCM L/R
ADC RATE
PCM C/LFE
DAC RATE
PCM FRONT
DAC RATE
PCM SURR
DAC RATE
DAC
SLOT
LOGIC
ADC
SLOT
LOGIC
AC '97
CONTROL
REGISTERS
EAPD
ANALOG MIXING
CONTROL
JACK SENSE
PLL
SPDIF
TX
ID0
ID1
RESET
SYNC
BITCLK
SDATA_OUT
SDATA_IN
JS0 JS1 JS2 JS3
EAPD
16-BIT
16-BIT
Σ-∆ ADC
CODEC CORE
20-BIT
Σ-∆ DAC
20-BIT
Σ-∆ DAC
20-BIT
Σ-∆ DAC
20-BIT
Σ-∆ DAC
EQ
20-BIT
Σ-∆ DAC
EQ
20-BIT
Σ-∆ DAC
Σ-∆ ADC
M
G = GAIN
A = ATTENUATION
M = MUTE
Z = HIGH Z
M
G
M
Z
G
M
GA
MGA
M
GA
M
GA
M
GA
M
GA
G
G
M
GA
M
GA
M
GA
MMM
GA
M
GA
M
GA
M
GA
M
GA
M
GA
M
M
M
MIC1
MIC2
PHONE_IN
CD_L
CD_GND
CD_R
AUX_L
AUX_R
LINE_IN_L
CD
DIFF AMP
LINE_IN_R
MZ
A
LFE_OUT
MZ
A
CENTER_OUT
MZ
A
LINE_OUT_L
M
A
MONO_OUT
MZ
A
LINE_OUT_R
M
A
SURR_OUT_L/
HP_OUT_L
M
A
SURR_OUT_R/
HP_OUT_R
HP
HP
VREF
G
VREFOUT
VOLTAGE
REFERENCE
AD1985
XTL_OUT
XTL_IN SPDIF_OUT
PC BEEP
GENERATOR
Σ
Σ
Σ
M
A
Figure 1.


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