AD1885_15 Datasheet, PDF (1/27 Pages) Analog Devices – AC 97 SoundMAX Codec

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AC’97 SoundMAX^® Codec
AD1885
AC’97 2.1 FEATURES
ENHANCED FEATURES
Variable Sample Rate Audio
Multiple Codec Configuration Options
External Audio Power-Down Control
Full Duplex Variable Sample Rates from 7040 Hz to
48 kHz with 1 Hz Resolution
Jack Sense Pins Provide Automatic Output Switching
AC’97 FEATURES
AC’97 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:
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™ Stereo 3D Stereo Enhancement
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
MIC1
MIC2
LINE
AUX
CD
VIDEO
PHONE_IN
MONO_OUT
HP_OUT_L
LINE_OUT_L
AD1885
0dB/
20dB
MMV
⌺
HV
MV
CHIP SELECT
JACK SENSES
AND EAPD CTRL
V_REF
PGA
16-BIT
⌺⌬ A/D
CONVERTER
PGA
16-BIT
⌺⌬ A/D
CONVERTER
G
⌺
A
M
POP
⌺
PHAT
STEREO
⌺
G GG G G
⌺
A AA A A
M MM M M
⌺⌺ ⌺ ⌺⌺
SAMPLE
RATE
GENERATORS
NC G
A
M
16-BIT
⌺⌬ D/A
⌺
CONVERTER
V_REFOUT
RESET
SYNC
BIT_CLK
SDATA_OUT
SDATA_IN
LINE_OUT_R
MV
HP_OUT_R
HV
PC_BEEP
⌺
PHAT
STEREO
⌺
POP
A
M
⌺⌺⌺ ⌺⌺
G = GAIN
A = ATTENUATE
M = MUTE
MV = MASTER VOLUME
HV = HEADPHONE VOLUME
G
A
NC M
16-BIT
⌺⌬ D/A
⌺
CONVERTER
OSCILLATOR
SoundPort is a registered trademark and PHAT is a trademark of Analog Devices, Inc.
XTL_OUT XTL_IN
REV. 0
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reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
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© Analog Devices, Inc., 2000