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AD1885 Datasheet

  • AD1885

  • AC’97 SoundMAX Codec

  • 27頁

  • AD

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a
AC鈥?7 2.1 FEATURES
Variable Sample Rate Audio
Multiple Codec Configuration Options
External Audio Power-Down Control
AC鈥?7 SoundMAX
廬
Codec
AD1885
ENHANCED FEATURES
Full Duplex Variable Sample Rates from 7040 Hz to
48 kHz with 1 Hz Resolution
Jack Sense Pins Provide Automatic Output Switching
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 Master Volume Control
Extended 6-Bit Headphone Volume Control
Digital Audio Mixer Mode
PHAT鈩?Stereo 3D Stereo Enhancement
AC鈥?7 FEATURES
AC鈥?7 2.1-Compliant
Greater than 90 dB Dynamic Range
Stereo Headphone Amplifier
Multibit
Converter Architecture for Improved S/N
Ratio Greater than 90 dB
16-Bit Stereo Full-Duplex Codec
Four Analog Line-Level Stereo Inputs for:
LINE-IN, CD, VIDEO, and AUX
Two Analog Line-Level Mono Inputs for Speakerphone
and PC BEEP
Mono MIC Input w/Built-In 20 dB Preamp, Switchable
from Two External Sources
High Quality CD Input with Ground Sense
Stereo Line-Level Outputs
Mono Output for Speakerphone or Internal Speaker
Power Management Support
48-Terminal LQFP Package
FUNCTIONAL BLOCK DIAGRAM
ID0
ID1
JS0/EAPD
JS1
AD1885
CHIP SELECT
MIC1
MIC2
LINE
SELECTOR
JACK SENSES
AND EAPD CTRL
V
REF
V
REFOUT
0dB/
20dB
AUX
CD
VIDEO
PHONE_IN
PGA
16-BIT
A/D
CONVERTER
PGA
16-BIT
A/D
CONVERTER
RESET
SYNC
MONO_OUT
MMV
G
A
M
POP
PHAT
STEREO
NC
G
A
M
16-BIT
D/A
CONVERTER
G
A
M
G
A
M
G
A
M
G
A
M
G
A
M
AC LINK
SAMPLE
RATE
GENERATORS
BIT_CLK
HP_OUT_L
HV
SDATA_OUT
LINE_OUT_L
MV
SDATA_IN
LINE_OUT_R
MV
POP
PHAT
STEREO
G = GAIN
A = ATTENUATE
M = MUTE
MV = MASTER VOLUME
HV = HEADPHONE VOLUME
NC
A
M
G
A
M
16-BIT
D/A
CONVERTER
HP_OUT_R
HV
OSCILLATOR
PC_BEEP
XTL_OUT XTL_IN
SoundPort is a registered trademark and PHAT is a trademark of Analog Devices, Inc.
REV. 0
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
漏 Analog Devices, Inc., 2000

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