AC97 SoundMAX Codec
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AC’97 2.1 FEATURES Variable Sample Rate Audio AC’97 FEATURES AC’97 2.2 Compliant Greater than 90 dB Dynamic Range Inte...
Description
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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
AC’97 SoundMAX® Codec AD1887
ENHANCED FEATURES Full Duplex Variable Sample Rates from 7040 Hz to 48 kHz with 1 Hz Resolution Software-Enabled VREFOUT 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
FUNCTIONAL BLOCK DIAGRAM
ID0 ID1
AD1887
MIC MIC PREAMP
CHIP SELECT
VREF
VREFOUT
CD
SELECTOR
LINE_IN
PGA
16-BIT ⌺-⌬ A/D CONVERTER
PGA
16-BIT ⌺-⌬ A/D CONVERTER
RESET SYNC
GA M
GA M
GA M
GA M
GA M M GA
SAMPLE RATE GENERATORS
AC LINK
BIT_CLK SDATA_OUT
16-BIT ⌺-⌬ A/D CONVERTER
SDATA_IN
SELECTOR
HP_OUT_L
HP
M
GA
M M M G = GAIN A = ATTENUATE M = MUTE
GA
16-BIT ⌺-⌬ A/D CONVERTER
HP_OUT_R
HP
M
GA
OSCILLATOR
XTL_OUT
XTL_IN
SoundMAX is a registered trademark of Analog Devices, Inc.
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