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Analog Devices Semiconductor Electronic Components Datasheet



AD1888

AC 97 SoundMAX Codec


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AD1888 pdf
a
AC ’97 SoundMAX®Codec
AD1888
FEATURES
AC ’97 2.3 COMPATIBLE FEATURES
6 DAC Channels for 5.1 Surround
90 dB Dynamic Range
20-Bit PCM DACs
S/PDIF Output
Integrated Stereo Headphone Amplifiers
Phone, Aux, and Line-In
High Quality CD Input
Selectable MIC Input
Mono Output
External Amplifier Power-Down Control
Double Rate Audio (fS = 96 kHz)
Power Management Modes
48-Lead LQFP and 48-Lead LFCSP Packages
ENHANCED FEATURES
Selectable Front and Rear MIC Inputs
with Preamp
Integrated PLL for System Clocking
Crystal-Free Operation
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
FUNCTIONAL BLOCK DIAGRAM
MIC1
MIC2
PHONE_IN
CD_L
CD_R
AUX_L
AUX_R
LINE_IN_L
LINE_IN_R
G
DIFF
AMP
MONO_OUT
MA
LINE_OUT_L
LINE_OUT_R
MZ A
MZ A
CENTER_OUT
LFE_OUT
MZ A
MZ A
SURR_L/
HP_OUT_L
SURR_R/
HP_OUT_R
REV. 0
HP M A
HP M A
AD1888
G
M
16-BIT -
ADC
G
M
16-BIT -
ADC
ADC
SLOT
LOGIC
PLL
GA GA
GA
GA
MM
GA
GA
M
M GA
M
GA
M
GA
M
MM
MMMMMM
G = GAIN
A = ATTENUATION
M = MUTE
Z = HIGH-Z
M GA
M GA
20-BIT -
DAC
20-BIT -
DAC
M GA
M GA
20-BIT -
DAC
20-BIT -
DAC
M GA
M GA
20-BIT -
DAC
20-BIT -
DAC
AC '97
CONTROL
REGISTERS
DAC
SLOT
LOGIC
SPDIF
TX
EAPD
JACK
SENSE
LOGIC
VOLTAGE
REFERENCE
XTAL_IN
XTAL_OUT
ID0
ID1
RESET
SYNC
BIT_CLK
SDATA_OUT
SDATA_IN
SPDIF_OUT
EAPD
JS0
JS1
VREF
VREFOUT
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 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 © 2003 Analog Devices, Inc. All rights reserved.



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AD1888 pdf
AD1888–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
1 kHz
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, or 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 AD1888
Description AC 97 SoundMAX Codec
Maker Analog Devices - Analog Devices
Total Page 30 Pages
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