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Analog Devices Semiconductor Electronic Components Datasheet



AD1980

AC 97 SoundMAX Codec



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AD1980 pdf
a
FEATURES
AC ’97 2.3 COMPATIBLE FEATURES
6 DAC Channels for 5.1 Surround
S/PDIF Output
Integrated Stereo Headphone Amplifier
Variable Rate Audio
Double Rate Audio (fS = 96 kHz)
Greater than 90 dB Dynamic Range
20-Bit PCM DACs
Line-Level Mono ”Phone” Input
High Quality CD Input
Selectable MIC Input with Preamp
AUX and Line_In Stereo Inputs
External Amplifier Power-Down Control
Power Management Modes
48-Lead LQFP Package
AC ’97 SoundMAX®Codec
AD1980
ENHANCED FEATURES
Integrated Parametric Equalizer
Stereo MIC Preamp Support
Integrated PLL for System Clocking
Variable Sample Rate 7 kHz to 96 kHz
Jack Sense (Auto Topology Switching)
Software Controlled VREF_OUT for MIC Bias
Software Enabled Outputs for Jack Sharing
Auto Down-Mix and Channel Spreading Modes
MC1
MC2
PHONE_IN
CD_L
CD_GND
CD_R
AUX_L
AUX_R
LINE_IN_L
LINE_IN_R
LFE_OUT
AD1980
CD
DIFF AMP
MZ A
CENTER_OUT
MZ A
LINE_OUT_L
MONO_OUT
LINE_OUT_R
MZ A
MZ A
MZ A
SURR_OUT_L/
HP_OUT_L
HP M A
SURR_OUT_R/
HP_OUT_R
HP M A
REV. 0
MIC PREAMP
G
G
FUNCTIONAL BLOCK DIAGRAM
VREFOUT
VREF
G
VOLTAGE
REFERENCE
GM
GM
CODEC CORE
PCM L/R
ADC RATE
16-BIT
-ADC
16-BIT
-ADC
XTL_OUT XTL_IN SPDIF
SPDIF
TX
PLL ID0
ID1
MG
PCM LFE
DAC RATE
20-BIT
-DAC
GA GA
GA GA
MMM
M
MM
MG
GA GA
GA GA
M MM
G = GAIN
A = ATTENUATION
M = MUTE
Z = HIGH Z
M
MM
20-BIT
-DAC
PCM FRONT
DAC RATE
MG
20-BIT
-DAC
MG
20-BIT
-DAC
M
MG
20-BIT
-DAC
M
MG
20-BIT
-DAC
PCM SURR
DAC RATE
DAC
SLOT
LOGIC
EQ
RESET
SYNC
BITCLK
SDATA_OUT
SDATA_IN
EQ
AC '97
CONTROL
REGISTERS
ANALOG MIXING
CONTROL LOGIC
EAPD
JS0 JS1 EAPD
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 © 2002 Analog Devices, Inc. All rights reserved.



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AD1980 pdf
AD1980–SPECIFICATIONS
STANDARD TEST CONDITIONS, UNLESS OTHERWISE
NOTED
Temperature
25°C
Digital Supply (DVDD)
Analog Supply (AVDD)
Sample Rate (fS)
Input Signal
3.3 V
5.0 V
48 kHz
1008 Hz
Analog Output Pass Band
20 Hz to 20 kHz
DAC Test Conditions
Calibrated
–3 dB Attenuation Relative to Full Scale
0 dB Input
10 kOutput Load LINE_OUT, MONO_OUT,
CENTER_OUT, and LFE_OUT
32 Output Load (HP_OUT)
ADC Test Conditions
Calibrated
0 dB Gain
Input –3.0 dB Relative to Full Scale
Parameter
ANALOG INPUT
Input Voltage (rms Values Assume Sine Wave Input)
LINE_IN, CD, AUX, PHONE_IN
MIC_IN with 30 dB Preamp
MIC_IN with 20 dB Preamp
MIC_IN with 10 dB Preamp
MIC_IN with 0 dB Gain
Input Impedance*
Input Capacitance*
MASTER VOLUME
Step Size (Line Out, Mono Out, Surround Out, Center, LFE)
Output Attenuation Range Span*
Mute Attenuation of 0 dB Fundamental*
PROGRAMMABLE GAIN AMPLIFIER—ADC
Step Size (0 dB to 22.5 dB)
PGA Gain Range Span
ANALOG MIXER—INPUT GAIN/AMPLIFIERS/ATTENUATORS
Signal-to-Noise Ratio (SNR)
CD to LINE_OUT
LINE, AUX, PHONE, to LINE_OUT*
MIC1 or MIC2 (Note: MIC Gain of 0 dB) to LINE_OUT*
Step Size All Mixer Inputs
Input Gain/Attenuation Range: All Mixer Inputs
DIGITAL DECIMATION AND INTERPOLATION FILTERS*
Pass Band
Pass-Band Ripple
Transition Band
Stop Band
Stop-Band Rejection
Group Delay
Group Delay Variation over Pass Band
Min
0
0.4 ϫ fS
0.6 ϫ fS
–74
Typ Max
1
2.83
0.032
0.089
0.1
0.283
0.316
0.894
1
2.83
20
5
7.5
1.5
46.5
80
1.5
22.5
90
90
90
1.5
46.5
16/fS
0
0.4 ϫ fS
± 0.09
0.6 ϫ fS
ϱ
Unit
V rms
V p-p
V rms
V p-p
V rms
V p-p
V rms
V p-p
V rms
V p-p
k
pF
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
Hz
dB
Hz
Hz
dB
sec
µs
–2– REV. 0



Part Number AD1980
Description AC 97 SoundMAX Codec
Maker Analog Devices - Analog Devices
Total Page 30 Pages
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