REV. 0
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a
AD1887
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
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Fax: 781/326-8703
© Analog Devices, Inc., 2001
AC’97 SoundMAX
®
Codec
ENHANCED FEATURES
Full Duplex Variable Sample Rates from 7040 Hz to
48 kHz with 1 Hz Resolution
Software-Enabled V
REFOUT
Output for Microphones and
External Power Amp
Split Power Supplies (3.3 V Digital/5 V Analog)
Mobile Low-Power Mixer Mode
Extended 6-Bit Headphone Volume Control
Digital Audio Mixer Mode
AC’97 2.1 FEATURES
Variable Sample Rate Audio
AC’97 FEATURES
AC’97 2.2 Compliant
Greater than 90 dB Dynamic Range
Integrated Stereo Headphone Amplifier
Multibit
⌺
-
⌬
Converter Architecture for Improved S/N
Ratio Greater than 90 dB
16-Bit Stereo Full-Duplex Codec
Two Analog Line-Level Stereo Inputs for:
LINE-IN and CD
Mono MIC Input with Built-In Programmable Preamp
High-Quality CD Input with Ground Sense
Power Management Support
48-Terminal TQFP Package
FUNCTIONAL BLOCK DIAGRAM
OSCILLATOR
SELECT
O
R
XTL_OUT
XTL_IN
V
REF
SAMPLE
RATE
GENERATORS
SELECT
O
R
PGA
PGA
16-BIT
⌺
-
⌬
A/D
CONVERTER
16-BIT
⌺
-
⌬
A/D
CONVERTER
16-BIT
⌺
-
⌬
A/D
CONVERTER
GA
M
MIC
PREAMP
M
GA
M
GA
M
GA
M
GA
M
GA
GA
M
16-BIT
⌺
-
⌬
A/D
CONVERTER
M
M
GA
M
HP
GA
M
HP
CHIP SELECT
AD1887
SDATA_IN
SDATA_OUT
BIT_CLK
SYNC
RESET
V
REFOUT
ID0
ID1
MIC
LINE_IN
CD
HP_OUT_L
HP_OUT_R
G = GAIN
A = ATTENUATE
M = MUTE
AC
LINK
SoundMAX is a registered trademark of Analog Devices, Inc.
