AC 97 SoundMAX Codec
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FEATURES AC ’97 2.3 COMPATIBLE FEATURES S/PDIF Output, 20 Bits Data Format, Supporting 48 kHz and 44.1 kHz Sample Rate...
Description
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FEATURES AC ’97 2.3 COMPATIBLE FEATURES S/PDIF Output, 20 Bits Data Format, Supporting 48 kHz and 44.1 kHz Sample Rates Integrated Stereo Headphone Amplifier Variable Sample Rate Audio External Audio Power-Down Control Greater than 90 dB Dynamic Range Stereo Full-Duplex Codec 20-Bit PCM DAC 3 Analog Line-Level Stereo Inputs for Line-In, AUX, and CD Mono Line-Level Phone Input Dual MIC Input with Built-In Programmable Preamp High Quality CD Input with Ground Sense
AC ’97 SoundMAX Codec AD1981B
Mono Output for Speakerphone or Internal Speaker Power Management Support 48-Lead LQFP Package, Lead-Free Available ENHANCED FEATURES Stereo MIC Preamps Support Built-In Digital Equalizer Function for Optimized Speaker Sound Full-Duplex Variable Sample Rates from 7040 Hz to 48 kHz with 1 Hz Resolution Jack Sense Pins Provide Automatic Output Switching Software Programmed VREFOUT Output for Biasing Microphone and External Power Amp Split Power Supplies: 3.3 V Digital and 5 V Analog Multiple Codec Configuration Options
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FUNCTIONAL BLOCK DIAGRAM
VREFOUT VREF XTL_OUT XTL_IN SPDIF
AD1981B
G MIC PREAMP MIC1
MS
VOLTAGE REFERENCE
CODEC CORE
G G
2CMIC
SPDIF TX
MIC2 PHONE_IN CD_L CD_GND CD_R AUX_L AUX_R LINE_IN_L LINE_IN_R CD DIFF AMP
PCM L/R ADC RATE
RECORD SELECTOR
PLL
ID0
G
M
16-BIT ⌺-⌬ ADC 16-BIT ⌺-⌬ ADC ID1
G
M
G G MONO_OUT M A
MIX
M M
16-BIT ⌺-⌬ ADC 16-BIT ⌺-⌬ ADC
AC '97 INTERFACE
ADC AND DAC SLOT LOGIC
RESET
SYNC
BIT_CLK
EQ CORE STORAGE
M
GA
20-BIT ⌺-⌬ DAC
B...
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