AD1881

a AC’97 2.1 FEATURES Variable Sample Rate Audio Multiple Codec Configuration Options External Audio Power-Down Control AC’97 SoundMAX® 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 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 Master Volume Control Extended 6-Bit Headphone Volume Control Digital Audio Mixer Mode PHAT™ Stereo 3D Stereo Enhancement 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: 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 VREF VREFOUT 0dB/ 20dB AUX CD VIDEO PHONE_IN PGA 16-BIT ⌺⌬ A/D CONVERTER PGA 16-BIT ⌺⌬ A/D CONVERTER RESET SYNC MONO_OUT MMV AC LINK ⌺ HP_OUT_L ⌺ POP HV G A M ⌺ G A M G A M G A M G A M G A M NC SAMPLE R...