AD1887

a 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. REV. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of ...