AD1981A

a AC ’97 2.2-COMPLIANT CODEC 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 16-Bit Stereo Full-Duplex Codec 20-Bit DAC Input Three Analog Line-Level Stereo Inputs for LINE-IN, AUX, and CD Mono Line-Level Phone Input Mono MIC Input with Built-In Programmable Preamp AC ‘97 SoundMAX Codec AD1981A High Quality CD Input with Ground Sense Mono Output for Speakerphone or Internal Speaker Power Management Support 48-Lead LQFP Package ENHANCED FEATURES 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 V REFOUT Output for Microphone Bias and External Power Amp Split Power Supplies: 3.3 V Digital and 5 V Analog Multiple Codec Configuration Options ® FUNCTIONAL BLOCK DIAGRAM VREF VREFOUT XTL_OUT XTL_IN ID1 ID0 AD1981A MIC_IN AUX PHONE_IN CD_L CD_GND CD_R LINE_IN CD DIFF AMP MIC PREAMP G VREF SELECTOR G XTAL OSCILLATOR LINK PORT/ ID SELECT A/D SAMPLE RATE GENERATOR G G M M 16-BIT ⌺-⌬ A/D CONVERTER 16-BIT ⌺-⌬ A/D CONVERTER 16-BIT ⌺-⌬ A/D CONVERTER 16-BIT ⌺-⌬ A/D CONVERTER 20-BIT ⌺-⌬ D/A CONVERTER 20-BIT ⌺-⌬ D/A CONVERTER PLL CLOCK GENERATOR G G M HP_OUT_L HP M A M LINE_OUT_L M A SELECTOR GA GA M M M GA M M GA GA M M M GA GA GA M D/A SAMPLE RATE GENE...